PT 26D
Operator´s manual
Chapter 1:Introduction ................................................. 3
Congratulations ........................................................ 3
Driving and Transport on Public Roads ................... 3
Towing ..................................................................... 3
Use ........................................................................... 4
Proper Service ......................................................... 5
Serial Number .......................................................... 6
Chapter 2:Symbols and Decals ................................... 7
Chapter 3:Safety Instructions.................................... 11
General Use ........................................................... 11
Driving on slopes ................................................... 16
Children .................................................................. 18
Maintenance .......................................................... 19
Transport ................................................................ 25
Environment protection .......................................... 26
User responsibility .................................................. 28
Chapter 4:Presentation .............................................. 29
1-2. Speed control .................................................. 34
3. Parking brake ..................................................... 35
4. Control panel ...................................................... 35
5-9. Seat ................................................................ 35
10. Steering wheel and steering wheel console ..... 37
11. Differential Lock ............................................... 38
12. Adjusting the cutting height .............................. 38
13. Fuelling ............................................................ 39
21-37. Controls on the control panel ...................... 40
21. Control lever hydraulics ................................... 40
22. Switch for operation of cutting unit ................... 42
23. Switch for extra hydraulic function
(hydraulic kit option) ............................................... 42
24. Push button for horn (traffic kit option) ............. 43
25. Indicators (traffic kit option) .............................. 43
26. Starter switch ................................................... 44
27. Headlight .......................................................... 44
28. Throttle control .................................................45
29. High speed .......................................................45
30. Weight transfer .................................................46
31. Rotating warning light (traffic kit option) ...........46
32. Parking lights (traffic kit option) ........................47
33. Spare ................................................................47
34-35.Power outlet .................................................47
36. Chronometer ....................................................48
40-51. Warning lamps ............................................48
49. Lever for steering wheel console angle ............49
Adjusting the steering wheel setting .......................49
Cooling system .......................................................50
Cutting unit .............................................................54
Accessories ............................................................55
Towing ....................................................................55
Chapter 5:Driving........................................................ 57
Mowing Tips ..........................................................57
Before Starting .......................................................59
Starting the engine .................................................61
Driving the machine ................................................66
Braking ...................................................................68
Cutting the engine ..................................................69
Bleeding in the event of fuel stoppage. ..................70
Engine stop ............................................................70
Chapter 6:Maintenance .............................................. 71
Maintenance Schedule ...........................................71
Cleaning .................................................................77
Removing the machine’s covers ............................79
Checking radiatorgrilles ..........................................79
Cleaning the radiator's heat exchanger ..................80
Adjusting the pump and generator drive belts ........80
Replacing the pump and generator drive belts .......81
Checking and adjusting the throttle control ............81
Checking the exhaust system ................................82
Adjusting the parking brake ....................................83
Servicing the air filter ..............................................84
Cleaning the cyclone filter ......................................84
Replacing the air filter .............................................85
Bleeding the fuel system ........................................86
Servicing the fuel filter ............................................87
Checking the Tyre Pressures .................................88
Servicing the battery ...............................................89
Fuses ......................................................................90
Checking the Safety System ..................................92
Replacing the bulb in the headlight ........................93
Light setting ............................................................94
The Cutting Unit Components ................................95
Attaching and removing the cutting unit .................95
Side shifting the cutting unit ...................................96
Setting the cutting height and tilt angle ..................99
The Cutting Unit’s Service Position ......................101
Cutting Unit Model ................................................103
Checking the Blades ............................................104
Replacing the power take-off belts .......................105
Adjusting the power take-off belts ........................106
Replacing the cutting unit belt ..............................107
Removal of BioClip Plug .......................................109
Chapter 7:Lubrication...............................................111
Lubrication Schedule ............................................111
General .................................................................112
Lubricating the cables ..........................................112
Accessories ..........................................................113
Lubricating in Accordance with the Lubrication
Schedule ..............................................................113
Chapter 8:Trouble Shooting Guide .........................127
Chapter 9:Storage.....................................................133
Winter Storage .....................................................133
Service .................................................................135
Chapter 10:Electrical system...................................137
Chapter 11:Hydraulic System ..................................138
Chapter 12:Fuel system ...........................................141
Technical Data...........................................................143
Design standards ......................................................149
Failure to observe the safety instructions or
operating instructions can result in serious injury
to the operator or others. The machine’s owner
must understand the importance of these
instructions and only allow operators who are
trained on the machine and who understand the
instructions to handle the machine. The operator
must, with full judgement, handle the machine with
care and must not be under the influence of alcohol,
drugs or medication that affects judgement.
Chapter 1: Introduction
Thank you for purchasing a Husqvarna PT 26D. Husqvarna PTs have been designed according to a unique concept
with a front mounted cutting unit and Husqvarna's unique rear wheel steering. The machine is built to give maximum
efficiency even in small and difficult areas. Collected controls and a hydrostatic transmission controlled by pedals
also contribute to the machine’s performance.
This Operator’s Manual is a valuable document. Following the instructions (use, service, maintenance, etc.) can
considerably increase the service life of your machine and even increase its resale value.
When you sell your machine, make sure to give the operator’s manual to the new owner.
A service journal is available for the machine. Ensure that service and repair work is documented. A well-kept
service journal reduces service costs for the season-based maintenance and affects the machine’s resale value.
Take the service journal along when the machine is taken to the workshop for service.
Driving and Transport on Public Roads
Check applicable road traffic regulations before driving and transport on public roads. You should always use
approved load retainers during transport and ensure that the machine is well secured.
The PT 26D is equipped with hydrostatic transmission and a bypass valve must be used when towing.
This machine is designed to mow grass on ordinary lawns and other open and level ground surfaces without
obstacles such as stones, stumps and the like. All other types of use are incorrect. The manufacturer’s instructions
with regard to driving, maintenance and repair must be followed precisely, even when the machine is equipped with
special accessories supplied by the manufacturer for which operating instructions accompany the delivery.
This machine should be operated, serviced and repaired only by persons who are familiar with its particular
characteristics and who are acquainted with the relevant safety instructions.
Accident prevention regulations, other general safety regulations, occupational safety rules, and traffic regulations
must be observed.
Unauthorised modifications to the design of the machine may absolve the manufacturer from liability for any
resulting personal injury or property damage.
Proper Service
Husqvarna’s products are sold all over the world and only by specialised retail traders offering complete service.
This ensures that you as a customer receive only the best support and service. Before the product is delivered, the
machine has, for example, been inspected and adjusted by your dealer, see the certificate in the Service Journal.
When you need spare parts or support concerning service, warranty issues, etc., please consult the following
This operator’s manual belongs to the
machine bearing serial number:
Serial Number
The serial number can be found on the printed plate attached on the right-hand side under the seat. The plate
includes the following information:
The machine’s type designation.
The manufacturer's type number.
The machine’s serial number.
Please state the type designation and serial number when ordering spare parts.
The engine’s serial number is on the engine block above the injection pump.
Please state this when ordering spare parts.
The hydraulic pump and hydraulic motors are equipped with rating plates that indicate type designation and serial or
manufacture numbers.
Please state these when ordering spare parts.
Symbols and Decals
Chapter 2: Symbols and Decals
These symbols are found on the machine and in the operator’s manual. Symbols for control units and warning lamps
are displayed in chapter “Presentation”, see page 42 and following pages.
Study them carefully so you understand their significance.
Read the
operator's manual
Engine off
Use hearing
Use protective
Use protective
Hazardous to
Starting instructions:
Activate the parking brake
Read the operator’s manual
Hydrostat pedals in neutral
CE conformity
Oil level
Danger. Keep your hands and
feet away
Noise emission to
surroundings in
accordance with the
directive of the
European Community.
The machine’s
emission is indicated in
chapter and on the
Symbols and Decals
Parking brake
Risk of the
Drive very
without the
cutting unit
Never carry
on the
or on its tools.
544 39 16 - 01
Read the
Operator's manual
Do not insert
your hands
or feet under
Only for
the cover
when the
cutting unit engine is
Pedal forwards
Pedal backwards
Differential lock
across a
Never use the
machine if
there are
children, or
pets, in the
Symbols and Decals
Xxxxxx x xxxx xxxxx xxxxx xxxxx Xxxxxxxxxxx xxx
xxxxxx. Xxxx xxxxxxx xxx xx xxxx
Used in this publication to notify the reader of a risk of serious personal injury, particularly if the reader should
neglect to follow instructions given in the manual.
Symbols and Decals
Xxx xxx xxxx xxxxxxxxx xxx xxxxx xxx xxxx xx
xxxxx xx xxxxx. Xxx xxxxxxxx xx x x xxxxxxx xx
xxxx xxxx.
Used in this publication to notify the reader of a risk of material damage, particularly if the reader should neglect to
follow instructions given in the manual. Used also when there is a potential for misuse or misassembly.
Avoid hosing the decals with high pressure washers. Replace damaged decals before the machine is used.
Safety Instructions
Chapter 3: Safety Instructions
These instructions are for your safety. Read them
General Use
Read all instructions in this operator’s manual and
on the machine before starting it. Ensure you
understand them and then observe them.
Learn how to use the machine and its controls
safely and learn how to stop quickly. Also learn to
recognise the safety decals.
If you get into a situation where you feel unsure
about how to progress, stop and seek expert
advice. Contact your Husqvarna retailer, service
agent or an experienced user. Avoid all usage that
you consider to be beyond your capability.
Only allow the machine to be used by adults who
are familiar with its use.
Make sure nobody else is in the vicinity of the
machine when you start the engine, engage the
drive, or run the machine.
Read the operator’s manual before starting the machine
Safety Instructions
Clear the area of objects such as stones, toys,
steel wire, etc. that may become caught in the
blades and thrown out.
Beware of the rear ejector and do not point it at
any one.
Stop the engine and prevent it from starting before
you clean the cutting unit.
Remember that the driver is responsible for
dangers or accidents.
Clear the area of objects before mowing
Never carry passengers. The machine is only
intended to be used by one person.
Always look down and behind before and during
reversing manoeuvres. Keep watch for both large
and small obstacles.
Slow down before turning.
Never take passengers
Safety Instructions
Shut down the blades when not mowing. The
blades must only be running when the cutting unit
is lowered and active when used for mowing.
Be careful when rounding fixed objects, so that the
blades do not hit them. Never run the machine
over foreign objects.
Never drive close to objects or other machines.
Remember that “Brake pedal reflex” from driving a
car has the opposite effect if you press on the
forward pedal.
Shut down the blades
Safety Instructions
Engine exhaust, some of its constituents and certain
vehicle components contain or emit chemicals
considered to cause cancer, birth defects or other
reproductive impairment. The engine emits carbon
monoxide, which is a colourless, poisonous gas. Do
not use the machine in enclosed spaces.
Only use the machine in daylight or in other well-lit
conditions. Keep the machine at a safe distance
from holes or other irregularities in the ground. Pay
attention to other possible risks.
Never use the machine if you are tired, if you have
consumed alcohol, or if you are taking other drugs
or medication that can affect your vision,
judgement, or co-ordination.
Beware of traffic when working near or crossing a
Keep children away from the work area
Safety Instructions
Never leave the machine unsupervised with the
motor running. Always stop the blades, apply the
parking brake, stop the engine and remove the
keys before leaving the machine.
Never allow children or other persons not trained
in the use of the machine to use or service it. Local
laws may regulate the age of the user.
You must use approved personal protective
equipment whenever you use the machine. Personal
protective equipment cannot eliminate the risk of
injury but it will reduce the degree of injury if an
accident does happen. Ask your dealer for help in
choosing the right equipment.
Use hearing protection to minimise the risk of
hearing impairment.
Wear approved protective goggles or a full visor
when driving.
Personal protective equipment
Safety Instructions
Never use the machine when barefoot. Always
wear protective shoes or protective boots,
preferably with steel toes.
Make sure that you have first aid equipment close
at hand when using the machine.
Driving on slopes
Driving on slopes is one of the operations where the
risk of the driver losing control of the machine or of it
overturning is the greatest; this can result in serious
injury or death. All slopes demand extra care. If you
cannot reverse up a slope or if you feel unsure, do not
mow it.
Do not drive down slopes with the unit raised.
Control can be reduced due to the changed centre of
Do as follows
Remove obstacles such as stones, tree branches, etc.
Mow up and down, not side-to-side.
Mow upwards and downwards on slopes, not sideways.
Safety Instructions
The differential lock should also be used on
Never drive the machine on terrain that slopes
more than 10°.
Avoid starting or stopping on a slope. If the tyres
start to slip, stop the blades and drive slowly down
the slope.
Always drive evenly and slowly on slopes.
Make no sudden changes in speed or direction.
Avoid unnecessary turns on slopes, and if it proves
necessary, turn slowly and gradually downward, if
Watch out for and avoid driving over furrows,
holes, and bumps. It is easier for the machine to
overturn on uneven ground. Tall grass can hide
Drive slowly. Do not turn the wheel sharply.
Be extra cautious with any additional equipment,
which can alter the machine’s stability.
Do not mow near verges, ditches, or banks. The
machine can suddenly overturn if one wheel
comes over the edge of a steep slope or a ditch, or
if an edge gives way.
Be extra cautious when driving on slopes
Do not mow wet grass. It is slippery, and tyres can
lose their grip so that the machine skids.
Safety Instructions
Try not to stabilise the machine by putting a foot on
the ground.
When cleaning under the machine, it may never be
driven near verges or ditches.
Serious accidents may occur if you fail to be on
guard for children in the vicinity of the machine.
Children are often attracted to the machine and
mowing. Never assume that children will stay put
where you last saw them.
Keep children away from the mowing area and
under close supervision by another adult.
Keep an eye out and shut off the machine if
children enter the work area.
Before and during a reversing manoeuvre, look
backward and downward for small children.
Never allow a child to ride with you. They can fall
off and seriously injure themselves or be in the
way for safe manoeuvring of the machine.
Never allow children to operate the machine.
Be particularly careful near corners, bushes, trees
or other objects that block your view.
Never allow children to operate the machine
Safety Instructions
Stop the engine. Remove the ignition key before
making any adjustments or carrying out
Never fill the fuel tank indoors.
Only store fuel in clean containers approved for
the purpose.
Never remove the fuel cap or fill the fuel tank with
fuel while the engine is running.
Allow the engine to cool before refuelling. Do not
Handle oil, oil filters, fuel and the battery carefully,
of environmental considerations. Observe
applicable recycling regulations.
Do not allow compressed air to come into contact
with skin. If compressed air penetrates the skin,
seek medical advice immediately.
Seek medical advice immediately if skin comes into
contact with fuel, which that is under high pressure.
The combustible material in some of the engine’s
components (e.g. certain seals) can be very
dangerous if ignited. Never allow burnt material to
come into contact with skin or eyes.
Never fill the fuel tank indoors
Safety Instructions
Do not remove the filler cap or any other
component on the cooling system when the engine
is hot or under pressure, as hazardous hot coolant
can spray out.
The engine, exhaust system, cooling system and
hydraulic system components become extremely hot
during operation. Risk of burn injuries if touched.
Wear protective gloves
If leaks arise in the fuel system, the engine must
not be started until the problem has been resolved.
Store the machine and fuel in such a way that
there is no risk of leaking fuel or fuel vapour
leading to damages.
Check the fuel level before each use and leave
space for the fuel to expand, because the heat
from the engine and the sun may otherwise cause
the fuel to expand and overflow.
Tank with level window
Safety Instructions
Avoid overfilling. In the event of spilling fuel on the
machine, wipe it up before starting the engine. If you
spill petrol on your clothing, change your clothing.
Material that has been contaminated by fuel must be
moved to a fire proof and environmentally safe place.
Allow the machine to cool before taking any
actions in the engine room.
The battery contains lead and lead compounds,
chemicals that are considered to cause cancer, birth
defects, and other reproductive system damage.
Wash you hands after touching the battery. Use
protective goggles when working with the battery.
Sparking can occur when working with the battery
and the thick cables in the starter motor circuit.
This can cause the battery to explode, fire or eye
Sparking in the circuit can not occur once the
battery's power connection cable (usually the
black negative cable) has been disconnected.
Risk of sparking
Safety Instructions
Avoid sparking and its consequences by:
Wearing protective glasses.
Make sure that the fuel cap is fitted and that no
flammable liquids are stored in an open container.
Do not work on the starter motor circuit in the vicinity of
spilt fuel.
Disconnect the battery's power connection cable (usually
the black negative cable) first and connect it last.
Exercise care with tools so that short circuiting does
not occur.
Do not short circuit across the starter relay's
connections to run the starter motor.
Be especially careful when handling battery acid.
Acid on the skin can cause serious corrosive
injuries. In the event of spillage on the skin wash
immediately with water.
Safety Instructions
Acid in the eyes can cause blindness, contact a
doctor immediately.
Be careful when servicing the battery. Explosive
gases form in the battery. Never perform
maintenance on the battery while smoking or in the
vicinity of open flames or sparks. This can cause
the battery to explode and cause serious injuries.
Make sure all nuts and bolts are tightened correctly
and that the equipment is in good condition.
Do not modify safety equipment. Check regularly to be
sure it works properly. The machine must not be driven
if protective plates, protective covers, safety switches or
other protective devices are not fitted or are defective.
Do not change the settings of governors and avoid
running the engine with overly high engine speeds. If
you run too fast, you risk damaging the machine
Never use the machine indoors or in spaces lacking
proper ventilation. Exhaust fumes contain carbon
monoxide, an odourless, poisonous and highly
dangerous gas.
Stop and inspect the equipment if you run over or into
anything. If necessary, make repairs before starting.
Never make adjustments with the engine running.
Do not smoke when carrying out maintenance
Never drive the machine in an enclosed space
Safety Instructions
The machine is tested and approved only with the
equipment originally provided or recommended by the
The blades are sharp and can cause cuts and gashes.
Wrap the blades or wear protective gloves when
handling them.
Check the parking brake’s functionality regularly.
Adjust and maintain as required.
The mulching unit should only be used where better
quality mowing is required and in known areas.
Reduce the risk of fire by removing grass, leaves
and other debris that may have fastened in the
machine. Allow the machine to cool before putting
it in storage.
Do not turn over the engine by hand without
preventing the engine from starting, which can be
done in different ways:
a. Remove the glow plug, no compression the engine
can therefore be easily turned over.
b. Loosen a pressure pipe connection on each jet
pipe a 1/2 turn.
c. Secure the injection pump stop arm in position for
zero supply.
Clean the machine regularly
Safety Instructions
The parking brake is not sufficient to lock the
machine during transport. Ensure you secure the
machine firmly to the transporting vehicle.
The machine is heavy and can cause serious crushing
injuries. Be extra cautious when it is loaded on or
unloaded from a vehicle or trailer.
Use an approved trailer to transport the machine.
Activate the parking brake and secure the machine
using approved fasteners, such as straps, chains
or ropes when transporting.
Check and comply with laws and regulations when
driving on public roads, a traffic kit is available as
an option. This can be retrofitted on PT 26D.
Front securing eyelets
Safety Instructions
Environment protection
Take care of the environment, there are numerous
environmental risks especially when performing
maintenance on the machine. This particularly applies
when dealing with engine oil, hydraulic oil, fuel, oil
filters, hydraulic filters and fuel filters. You must be
attentive to ensure spillage does not occur when you
open a system that contains oil or fuel.
Always wipe up spillage. When using cloths,
sawdust or oil absorbents, these should be treated
as environmental hazardous waste. Follow local
Choose an area, preferably with a concrete floor,
when you handle or store oils and fuel so that you
can clear up any spillage without it penetrating into
the ground.
Avoid spillage, use a funnel and fill carefully.
When draining, ensure that a suitably sized
container is placed correctly. Remember that the
oil does not always run straight down.
Transfer the waste oil into a sealed container and
hand in for destruction. Remember to follow local
regulations. Generally you can deposit waste oil at
workshops or petrol stations that handle waste oil.
Safety Instructions
Replaced oil and fuel filters are environmental
hazardous waste, handle them as waste oil.
Do not spill fuel when refuelling. One litre of diesel
fuel can, according to the Swedish Rescue
Services Agency, destroy up to one million litres of
drinking water. Spilt fuel is a fire risk.
Wash your hands thoroughly when the job is done.
Coolant is poisonous and sweet. Ensure that
animals do not come into contact with open
containers or pools of fluid.
Bear in mind the risk of grass fire when working in
dry vegetation. Never operate a machine with a
modified or damaged muffler, as sparks from the
exhaust fumes can set dry grass on fire.
Safety Instructions
User responsibility
Study and follow the safety instructions, see
“Safety Instructions” on page 11.
Follow the maintenance schedule for care, see
“Maintenance Schedule” on page 71, lubrication
chart, see “Lubrication Schedule” on page 111 and
the instructions for operating the machine, see
“Presentation” on page 29 and “Driving” on
page 57.
Follow the maintenance instructions, see
“Maintenance” on page 71, lubrication, see
“Lubrication” on page 111 and storage, see
“Storage” on page 133.
Chapter 4: Presentation
Congratulations on your choice of an exceptionally
high quality product. This operator's manual describes
Husqvarna PT 26D.
It is fitted with a Perkins 3 cylinder diesel engine
developing 26 horse power.
PT 26D is equipped with hydraulic steering and
attachment lift. They are supplied with pressure from a
pump on the engine.
The machine is all wheel drive in low speed mode.
PT 26D
The power transmission from the engine is hydrostatic.
It is supplied with pressure by a pump under the
driver’s seat. A shaft with two flexible couplings
powers the pump. Flow and direction are regulated
with the pedals, so that forward and reversing speeds
are variably controlled. One pedal to drive forwards (1)
and one pedal to reverse (2). The pump drives four
hydraulic motors in parallel, one for each wheel.
The power transmission is also used as service brake.
There are low and high speeds for driving. High or low
speed is selected using a switch.
Speed control
The machine is equipped with an electro-hydraulic
differential lock, which is controlled by a pedal. The
differential lock only works longitudinally, which means
that you can turn the machine with the differential lock
The differential lock does not work in high speed.
Rear light, horn, direction indicators and rotating
warning lights are optional equipment (traffic kit).
Differential lock pedal
The cutting unit takes power from the engine by means
of an electromagnetic clutch, two V-belts, apower takeoff shaft, a propeller shaft and a bevel gear.
Placement of controls
Speed control for driving forwards page 34
Speed control for reversing page 34
Parking brake page 35
Control panel page 32
Knob for the backrest rake page 36
Catch for seat folding page 35
Knob for the lumbar support page 37
Lever for lateral seat adjustment page 36
Knob for seat suspension page 36
Steering wheel console page 33
Pedal for differential lock page 38
Cranks for setting cutting height page 38
Fuel tank cover page 39
Control panel
Control lever hydraulics page 40
Switch for operating the cutting unit page 42
Switch for 2nd hydraulic function (option) page 42
Horn switch (option) page 43
Turn signal lights switch (option) page 43
Starter switch page 44
Switch for the lights page 44
Throttle control page 45
Switch for high and low speed page 45
Switch for weight transfer page 46
Rotating warning light (option) page 46
Parking lights (option) page 47
Power outlet page 47
Mains switch power outlet page 47
Chronometer page 48
Steering wheel console
Warning lamp Battery charging page 48
Warning lamp Differential lock page 48
Warning lamp Coolant temperature page 48
Warning lamp Glow plug heating page 48
Warning lamp Engine oil pressure page 48
Warning lamp Cutting unit operation page 48
Warning lamp Parking brake page 48
Warning lamp High speed page 48
Warning lamp Right-hand indicator page 48
Lever for tilting the steering wheel console page 49
Warning lamp Full beam page 48
Warning lamp Left-hand indicator page 48
1-2. Speed control
The speed of the machine is variably controlled using
two pedals. Pedal (1) is used to travel forwards and
pedal (2) to reverse.
Make sure that no branches can interfere with the
pedals when mowing under bushes.
Speed control
3. Parking brake
Apply the parking brake by moving the handle forward.
Release the parking brake by moving the handle back.
4. Control panel
There are controls and switches on the control panel
on the right-hand side of the driver that are used when
operating the machine. The lower section of the panel
is equipped with a cover over the machine’s fuses and
relays. See “21-37. Controls on the control panel” on
page 40.
Parking brake
5-9. Seat
The seat has a hinged mounting on the front edge and
can be folded forwards.
To fold the seat forward, the steering wheel console
must be folded forwards and the lock (6) for the seat
Seat lock
Do not adjust the seat whilst driving. Risk of unsafe
Lateral adjustment and adjusting suspension
The seat can also be adjusted lengthways:
When making adjustments, the lever (8) under the
left-hand side of the seat is moved to the left, after
which the seat can be moved backwards or
forwards to the desired position.
The seat’s suspension can be adjusted by turning
the knob (9) under the front edge of the seat. A
scale indicates the setting.
There are two knobs on the sides of the backrest:
Backrest tilt is adjusted using the knob (5) on the
right-hand side of the seat.
Adjusting the backrest tilt
Lumbar support is adjusted using a knob (7) on the
left-hand side of the backrest.
10. Steering wheel and steering wheel console
Knob for the lumbar support
The position of the steering wheel can be adjusted
vertically. The mounting for the steering unit in the
steering column can be adjusted vertically.
Depress the lever (49) and fold the steering wheel
console to one side to facilitate entering the driver’s
seat. The steering wheel console can be adjusted
See “40-51. Warning lamps” on page 48.
The headlights are set using the knob in the position
closest to the driver. In the second position the range
of the lighting will decrease.
Steering wheel and steering wheel console
11. Differential Lock
The differential lock is electro-hydraulic. It is operated
by a pedal controlled switch. The differential lock only
works longitudinally, it ensures operation on at least
one front wheel and one rear wheel. This means that
you can turn the machine with engaged differential
lock without causing any interruptions in the power
transmission or damage to the lawn.
As the differential lock is not mechanical, it can be
engaged or disengaged without limitation, even when the
machine freewheels or in the event of wheel spin. When
the pedal is released, the differential lock disengages
without the driver having to carry out any other
operations. The differential lock only works at low speed
and is active both up and down slopes.
Differential lock pedal
12. Adjusting the cutting height
The cutting height adjustment allows the cutting height
to be adjusted in seven different positions 25.4 mm 127 mm (1” - 5”).
In order to obtain an even cutting height, it is important
that the settings are in the same positions and the air
pressure is the same in the front wheels, 100 kPa /
1.0 bar / 14.5 PSI and in the cutting unit’s pivot wheels
150 kPa / 1.5 bar / 21,7 PSI
When the adjustments have been made, the cranks
should be released using the button in the crank and set
to a position that does not catch on any bushes or similar.
Front cutting height adjustment
13. Fuelling
The fuel level in the tank is indicated in the sight glass.
Do not fill the tank completely, leave an area of at least 2.5 cm (1").
Fill the fuel tank with diesel. Do not use petrol under
any circumstances.
Use fuel with a cetane rating of above 45. Max RME
mixture 5 % in mineral oil based fuels. Aviation kerosene
(JP5, JP8 and Jet-A) can be used if lubricant additives
are used, but the starting ability may be affected. JP4 is
not recommended. Unmixed RME can be used.
Do not smoke when filling the tank with fuel.
Tank with level window
Diesel is less flammable than petrol at normal temperatures, but becomes very flammable if heated to the flash
point. This varies depending on the type of diesel but is normally higher than +50 °C (120 °F).
Observe fuel hygiene. The diesel engine’s fuel injection system is very sensitive and can be damaged by
contaminants, which may be so small that they cannot be seen with the naked eye. Only use clean containers
(closed + dust-free funnel). Wipe away any dust before removing the fuel tank filler cap. There is a filter to protect
the fuel injection system, however if it becomes blocked operational malfunctions may occur. Rectifying damage,
operational malfunctions, filter replacement caused by poor hygiene are not repairs that are covered under warranty
Remember the environmental risks. See “Environment protection” on page 26.
Wipe up any spillages. Material that has been contaminated by fuel must be moved to a safe place.
If you spill fuel on your clothes, change to prevent skin irritations.
Winter fuel and paraffin precipitation
Malfunctioning can occur when driving in extremely
cold conditions on account of paraffin precipitation,
which can occur if using standard fuel. To avoid this,
winter fuel, diesel with additives to prevent precipitation,
is sold in relevant climates. In certain regions different
types of summer and winter fuels are sold, in other
regions. winter fuel is sold all year round. Ask you fuel
supplier and only use winter fuel below 0 °C (+32 °F).
21-37. Controls on the control panel
The control panel is prepared for optional extras,
which are sold as accessories for PT 26D. Therefore,
some of the following control units may not be included
with your machine.
21. Control lever hydraulics
The lifting lever is used to put the cutting unit in either
the transport or mowing position when hydraulic
pressure is available.
Lifting the cutting unit (transport position)
Stop the blades by pressing in the switch for driving
the cutting unit (22).
Raising the cutting unit with the lifting lever
Pull the lever backward to engage the transport position.
The unit is then raised.
The cutting unit can be raised slightly with the blades
in operation. This is to facilitate work when cutting in
extremely tall grass or on uneven surfaces. The
machine is, however, equipped with an automatic
blade stop function, which is activated when the
cutting unit reaches the transport position. If the
automatic blade stop is activated, the switch (22) must
be pressed in and pulled out to restart.
Lowering the unit (mowing position)
Move the lifting lever forwards to engage the cutting
position. The unit is then lowered. The lever does not
need to be held in position, allow it to spring back to
the zero position when the unit has been lowered.
The blades are started with the switch for driving the
cutting unit (22).
Weight transfer can be activated, which means the cutting
unit follows the ground contour and unevenness on the
lawn more precisely. See “Weight transfer” page 46
Other functions (option)
When the lever is moved laterally, the oil pressure is
operated to the 2nd hydraulic function, the terminals
are under the foot plate hatch.
Mowing Position
22. Switch for operation of cutting unit
The cutting unit can only be started when the driver is sitting in
the seat.
Pull out the switch to engage cutting unit
Press in the switch to disengage cutting unit
If the safety circuit trips cutting unit operation, the
switch must be pressed in and pulled out again.
The safety circuit trips and the cutting unit stops:
When the cutting unit is raised to the uppermost
When the driver leaves the seat. There is a brief delay to
prevent stoppages should the driver bounce in the seat
When high gear is engaged.
When the starter is activated.
Switch for operation of cutting unit
23. Switch for extra hydraulic function
(hydraulic kit option)
The switch is used, among others, when steering the
folding plough for individual control of the left or righthand plough-blades. Operate the plough blade using
the lever (21).
Switch for extra 12 V outlet
24. Push button for horn (traffic kit option)
Switch for horn
25. Indicators (traffic kit option)
Press for the left-hand or right-hand indicator. Blinkers
are switched off automatically after approximately
30 seconds or manually by pressing in the same
direction. A new 30 second period is activated if you
press after the blinkers have been switched off.
Pressing in the opposite direction while flashing,
activates the blinkers for the opposite side for
30 seconds.
Switch for indicators
26. Starter switch
Three positions:
All functions switched off. The engine is stopped. The
parking light can be switched on (traffic kit option).
Normal operating position.
Start and Preheating
Keep the switch in the glow plug mode, when glow
plug heating is complete the starter is engaged.
During glow plug heating, light (43) on the indicator
panel comes on. Non-locking to position ON.
Turning again within 2 seconds gives starting
without glow plug heating.
Starter switch
27. Headlight
Three positions, clockwise in the following order:
Dipped beam
Full beam
If the switch is moved to the Dipped beam position
automatic dipped beam mode, dipped beam is
switched on when the engine is running.
Switch for headlight
28. Throttle control
The accelerator is used to control the speed of the
engine and thereby also the rotation speed of the blades.
In order to increase or decrease the engine speed, the
control is moved forwards or backwards respectively.
29. High speed
Throttle control
Activated switch. This switch is used to select either
high or low speed.
The speed must drop to zero before the machine shifts
to low speed if high speed is actuated.
If the differential lock is actuated, the machine will not
shift to high speed until the pedal is released.
Front wheel drive is engaged in high speed mode.
All wheel drive is engaged in low speed mode.
The differential lock and cutting unit only work in low
speed mode.
High speed
30. Weight transfer
Weight transfer is activated using this switch, transfers
a proportion of the unit’s weight to the machine. This
causes greater ground pressure on the machine’s
front wheels and lower ground pressure on the unit’s
pivot wheels.
It is recommended to use weight transfer when lawn
mowing and sweeping. When snow clearing or
changing tools, the function should be off so that the
lifting arms can be lowered.
This function works when the lower position is
selected with control lever (21).
Weight transfer
31. Rotating warning light (traffic kit option)
Observe any local traffic laws when using the warning
Rotating warning light
32. Parking lights (traffic kit option)
Can be lit using the switch even if the ignition switch is
not switched on. The battery will be completely
drained in approximately 20 hours.
The parking light is lit automatically when the engine is
running, even if the switch is not switched on.
33. Spare
34-35.Power outlet
A seat heater or mobile phone charger are examples
of articles that can be connected to the power socket (34).
The power outlet is switched on and off using power
switch (35) on the control panel.
Parking lights
The electrical outlet socket is fuse protected by its own
fuse FU11 (max. 10 A), which is located behind a
cover on the outside of the control panel.
Power outlet with switch
36. Chronometer
The chronometer shows how many hours the engine
has been running. Any time when the engine is not
running but the ignition is switched on is not registered.
The last digit shows tenths of an hour (6 minutes).
40-51. Warning lamps
On the steering wheel console under the steering wheel
there are warning lamps for battery charging (40),
differential lock (41), coolant temperature (42), glow
plug heating (43), oil pressure (44), cutting unit
operation (45), parking brake (46), high speed (47), full
beam (50) and indicators (48, 51).
During start-up all lights come on for function checks.
The most important lights are coolant temperature and
oil pressure. The engine stops automatically if any of
these light up.
The lamp for the coolant temperature flashes at
approximately 100oC and lights constantly at
approximately 110oC when the engine stops.
Reduce the load to lower the temperature if the lamp
The warning lamps are LEDs, which cannot be
replaced separately. The entire indication panel must
be replaced in the event of a fault.
Warning lamps
49. Lever for steering wheel console angle
When the lever is activated, the angle of the steering
wheel console can be adjusted for a more comfortable
driving position or to facilitate entering the driver’s
seat. The lever is sprung.
Adjusting the steering wheel console angle and steering
Do not adjust the steering wheel angle or whilst
driving. Risk of unsafe operation.
Adjusting the steering wheel setting
The mounting for the steering unit in the steering
column can be adjusted vertically. Undo the screws
that hold the casing and remove the screws, on both
sides of the column, that hold the mounting in the
column. Adjust the mounting to the correct height,
screw the mounting into place in the column and fit the
Adjusting the steering column vertically.
Cooling system
Coolant must be a mixture of 50 % antifreeze fluid
and 50 % soft water. Anticorrosion agent in the
coolant will be diluted if a reduced mixture is used.
A higher mixture can negatively influence the cooling
capacity. Salt water or water with a high lime content
can cause corrosion or deposits in the cooling system.
Coolant filling
The engine is water cooled. In the event of a high engine coolant temperature being indicated, check the coolant
level first.
Also check that the radiator grille behind the driver's seat is not clogged. See “Checking radiatorgrilles” on page 79.
The correct engine coolant level is important for the cooling system to function properly. Therefore, the engine
coolant level should be checked regularly. See warnings on the next page. The coolant must be visible when the
filler cap is removed.
Continuous coolant losses mean that there is a leak. In such a case, the cooling system should be checked by a
qualified technician. It is not sufficient to only top up the coolant. If the engine overheats, the coolant drops. Allow the
engine to cool before filling.
The cooling system must not be filled with salt water, this causes corrosion damage to the engine.
Change the coolant if it is discoloured or dirty. The cooling system must then be thoroughly flushed.
Do not open the cap quickly when the engine is hot,
first release the overpressure with the cap partially
slackened off. Risk of burns. Use protective gloves
and protective goggles.
Coolant draining engine block
The antifreeze fluid and coolant are hazardous to
health. Store them in marked containers that are
inaccessible to children and animals.
When draining the cooling system, both the taps must
be opened.
Coolant draining lower hose
Never fill a hot engine with cold coolant. Risk of
extensive engine damage.
Only fill antifreeze and water ready mixed in a 50/50 ratio.
Check the level when the engine has been driven for a few minutes after filling. There could have been air in the
system which has now been released.
Only use a glycol based antifreeze that is approved by the applicable norms BS 6580:1992 or ASTMD 3306-89 or
AS 2108-1977 (indicated on the packaging).
The antifreeze agent must be intended for use with light alloy engines.
Your Husqvarna supplier can provide the correct type of antifreeze agent.
If you use the incorrect type or mix different types of
antifreeze agents, a chemical reaction may occur,
which causes overheating and severe engine damage.
These are not covered by the warranty.
Use antifreeze agent all year round and even in
climates that do not have a risk of frost. The antifreeze
agent contains additives that protect the engine
cooling system against corrosion.
Freezing point
60 %
40 %
- 47 °C
50 %
50 %
- 37 °C
40 %
60 %
- 25 °C
Mixing table
Cutting unit
PT 26D can be equipped with cutting unit, Combi 132
with a 132 cm cutting width or Combi 155 with a
155 cm cutting width.
The cutting unit is driven by a v-belt, a power take-off
shaft and a propeller shaft from the engine. It is
engaged by an electro magnetic clutch, which is
located in front of the engine’s flywheel.
The Combi unit functions as a BioClip unit when a
BioClip plug is fitted under the unit cover, but can be
set to rear ejection by removing the BioClip plug.
Cutting unit Combi 155
The unit’s BioClip function finely chops the grass
several times before returning it to the lawn as
fertiliser. The rear ejector ejects the clippings behind
the unit without finely chopping them.
Cutting unit Combi 155 can be mounted 8 cm (3 1/8")
laterally to the side in relation to the machine.
If necessary, the cutting unit can be turned to the
service position to be able to clean the underneath of
the cover for example.
Service position
The accessories are described in separate operator’s
manuals. Contact your dealer if you require an
Examples of original accessories available for
Husqvarna PT 26D:
Traffic kit: Lighting with direction indicators, parking
light and rotating warning lamp
Accessory hydraulic kit; Hydraulic valves, quick
couplings,hydraulic hoses, switch and cable
V blade
Bucket with hydraulic emptying
Catalytic converter.
Towing must be avoided. Only damaged machines that
cannot be driven may be towed in the event of being
recovered or loaded onto vehicles.
The bypass valve must be loosened by 2-4 turns when
towing. Lift the driver’s seat and unscrew the bypass
valve. Remember to retighten the valve.
Unscrew the bypass valve when towing
Chapter 5: Driving
Mowing Tips
Use ear protection.
Clear the lawn of stones and other objects that can
be thrown out by the blades.
Locate and mark plants, rocks and other fixed
objects in order to avoid collisions.
Begin with a high cutting height and reduce it until
the desired mowing result is attained.
The mowing result will be best with a high engine
speed (the blades rotate rapidly) and low speed
(the machine moves slowly). If the grass is not too
high and thick, the driving speed can be increased
without noticeably depreciating the mowing result.
Mark objects if necessary
Never drive the machine on terrain that slopes more
than 10°. Mow upwards and downward on slopes,
never sideways. Avoid sudden directional changes.
Max 10° in all directions
The finest lawns are obtained by mowing often.
Mowing will be more even and the clippings will be
more evenly distributed across the area. Mowing
time will not be longer as higher driving speeds
can be selected without impairing the mowing
Avoid cutting wet grass. The mowing result is often
worse as the grass clippings lump together more
easily and the ground is more easily damaged.
Clean the underneath of the cutting unit after use.
When cleaning, the cutting unit should be moved
into the service position. If water is used, lower the
cutting unit and let the blades rotate a few minutes
to drive any water out of the bearings and belts.
Service position
It is important to mow frequently when mowing
with the mulching function.
Use the differential lock if there is a risk of wheel
spin. The differential lock can be engaged during
operation and turns can be made with it engaged.
Before Starting
The air intake grille behind the driver's seat must not
be blocked by, for example, clothing, leaves, grass or
dirt. Impaired cooling of the engine. Risk of major
engine damage.
Differential lock pedal
Start gas or ether must not be used for this engine.
Read section “Safety Instructions” on page 11 and
“Presentation” on page 29.
Air intake
Carry out daily maintenance according to
“Maintenance Schedule” on page 71.
Adjust the seat to the desired position. See “5-9.
Seat” on page 35.
Adjust the steering wheel and steering wheel
console to the desired position.
See “10. Steering wheel and steering wheel
console” on page 37.
Select the required cutting height (1-7) using the
cutting height settings. Move the knob to the
horizontal position so that it does not catch on
bushes or similar.
Cutting height setting
Cutting height settings
Starting the engine
1. Apply the parking brake by moving the handle
The engine cannot be started if the parking brake
is applied or if a driving pedal is pressed.
Check that the switch for the cutting unit drive is
depressed. If the engine starts with the switch
pulled out, it must be pushed in and pulled out
again in order for the cutting unit to work.
Apply the parking brake.
2. Move the speed control to the max speed position
so the injection pump is set to full feed mode.
Engine speed control in max. speed position
3. Turn the ignition key to the glow plug heating
position and keep it there until the warning light on
the steering wheel console goes out and the
starter motor engages. Glow plug heating is
dependent on the engine temperature. If you
require an extend glow plug heating period, you
must wait in the OFF or ON position for 4 seconds.
If the glow plug heating lamp does not come on
and the starter is not engaged, check that the
parking brake is engaged and that the drive pedals
are not actuated. Starting without glow plug
heating (warm engine) is possible if you turn the
ignition key to glow plug mode, back to ON and to
glow plug heating again within 2 seconds.
Ignition key, glow plug heating and start position
Do not run the starter motor for more than
15 seconds at a time. If the engine does not start, wait
about 30 seconds before trying again.
4. When the engine starts, immediately release the
ignition key back to the intermediate position.
Starter key, intermediate position (ON)
Never run the engine indoors, in enclosed or badly
ventilated areas. Engine exhaust fumes contain
poisonous carbon monoxide and carcinogenic
5. Set the desired engine speed (even idle) using the throttle
Engine speed control in idling mode
Allow the engine to run at a moderate speed, for
3-5 minutes before loading it heavily.
Starting in cold conditions
If the engine does not start due to cold conditions,
repeat glow plug heating and try starting again.
Start gas or ether must not be used.
Start gas or ether must not be used
Starting with a weak battery
Lead-acid batteries produce explosive gases. Avoid
sparks, open flames and smoking close to batteries.
Always wear protective glasses in the vicinity of
If the battery is too weak to start the engine, it should
be recharged.
If jump leads are used for emergency starting, follow
the procedure below:
Your Rider is equipped with a 12-volt system with
negative earth. The other vehicle must also have a 12volt system with negative earth. Do not use your lawn
mower battery to start other vehicles.
Connecting jump leads:
Connect each end of the RED lead to the
POSITIVE terminal (+) on each battery, and take
care not to short-circuit an end against the chassis.
Connect one end of the BLACK lead to the
NEGATIVE terminal (-) on the battery that is fully
Connect the other end of the BLACK lead to a
good CHASSIS EARTH, away from the fuel tank
and battery.
Remove the leads in reverse order:
The BLACK cable is removed from the chassis
and then the fully charged battery.
Finally the RED cable from both batteries.
Jump starting
Driving the machine
1. Release the parking brake by pulling the handle
Parking brake
2. Select high or low speed with the switch on the
control panel.
Speed selector
3. Carefully press down one of the pedals until the
required speed is attained.
Pedal (1) is pressed down to travel forwards and
pedal (2) to reverse.
Driving pedals
4. Lower the cutting unit to the ground using the
lifting lever. Move the lifting lever forwards.
Lifting lever lowering position
5. Activate weight transfer if desired using the switch (30)
on the control panel. The weight transfer position
must always be activated when driving up slopes
and deactivated when driving down slopes.
6. Start the cutting unit as necessary using the switch
for power take-off (22) on the control panel.
The cutting unit can only be started in low speed. If
the switch has already been pulled out and the unit
does not start, press it in and pull it out again
(See safety circuit on page 42).
Switch for power take-off and weight transfer
Release the drive pedals. The machine slows and is stopped by
the drive system. Do not use the parking brake as the drive
Quicker braking is possible if you press down the drive pedal for
the opposite direction.
Cutting the engine
If the engine has been worked hard, it is preferable to
let the engine idle for a minute so it is running at its
normal working temperature when it is stopped.
1. Switch off the cutting unit if it is running.
2. Lift the cutting unit using the lifting lever.
Switch off the cutting unit
3. Move the throttle control to the “MIN” position. Turn
the ignition key to “OFF”.
Stop position
4. Apply the parking brake, when the machine is
stationary, by first pulling up the lock handle (36)
on the control panel and then press down the
parking brake pedal (3).
Bleeding in the event of fuel stoppage.
See the chapter, Maintenance “Bleeding the fuel
system” on page 86.
Engine stop
If the engine stops, it is still possible to steer, but the
wheel is heavy to turn. As the transmission is
hydrostatic the machine stops immediately.
Parking brake
Chapter 6: Maintenance
It is good practice to always check for leaks and loose components after use. Also check the machine and listen for
knocking sounds. During hard use and in extreme conditions, the service intervals should be reduced.
Check the cooling system’s antifreeze before the Winter.
Maintenance Schedule
The following is a list of maintenance procedures that must be performed on the machine. Paragraphs that are
marked with footnote number 4, see an authorised service workshop.
● = Described in this manual
❍ = Not described in this manual.
Daily maintenance
befor after
Check for fuel and oil leaks
Check the safety switch, seat
Check the safety switch pedal
system, neutral position
Check the engine oil level (at every
Check the hydraulic oil level
Maintenance interval hours
● = Described in this manual
❍ = Not described in this manual.
Daily maintenance
befor after
Maintenance interval hours
Check the coolant level
Check/clean the engine’s cooling air
intake, radiator mesh and radiator
Check fastenings (screws, nuts, etc.)
Start the engine and blades, listen for
unusual sounds
Clean under the cutting unit and belt
Check for damage
Check the air pressure in the tyres
(100 kPa)
Clean thoroughly around the engine
Clean thoroughly around the
● = Described in this manual
❍ = Not described in this manual.
Daily maintenance
befor after
Maintenance interval hours
Lubricate according to lubrication chart3
Clean the air filter and empty the
particle trap
Check the blades
Change the engine oil and filter1
Replace hydraulic oil filter and check
the oil level4, 5
Check the tension and condition of
the belts (generator belt, power takeoff belt, cutting unit belt)
Check the condition of the battery,
clean if necessary
Check the oil level in the bevel gear,
top up if necessary
● = Described in this manual
❍ = Not described in this manual.
Daily maintenance
befor after
Maintenance interval hours
Check the wheel nuts
Check the parking brake, adjust if
Check the safety function
Check/adjust the cutting unit settings.
(tilt angle)5
Replace the air filter and clean the
cyclone filter
Replace the belts (power take-off belt
and cutting unit belt)
Check the condition of the hydraulic
Replace fuel filter and check hoses4
Adjust the power take-off belts5
● = Described in this manual
❍ = Not described in this manual.
Daily maintenance
befor after
Maintenance interval hours
Adjust the valves and check the
engine speed4
Replace the pump and generator belt
Change the hydraulic oil and filter4
Change the oil in the bevel gear
Change the coolant4
Check all hoses with connections to
the engine and the engine’s
Replace the diaphragm for the closed
crankcase ventilation4
Check cables and terminals in the
electrical system4
● = Described in this manual
❍ = Not described in this manual.
Daily maintenance
befor after
Maintenance interval hours
Check generator and starter motor4
Pressure test the fuel injection
Check the coolant pump4
1. First change after 25 hours. When operating with a heavy load or at high ambient temperatures,
replace the engine oil every 125 hours.
2. Maintenance and replacement are required more often in dusty
3. With daily use, the machine shall be lubricated twice weekly.
4. Performed by authorised service workshop.
5. After the first 25 hours.
No service operations may be performed on the
engine or cutting unit unless:
The engine is stopped.
The parking brake is on.
The ignition key has been removed.
Clean the machine directly after use. It is much easier
to wash off grass cuttings before they dry.
Oily dirt can be removed using a cold degreasing
agent. Spray a thin layer and wait a few minutes.
Rinse at normal water pressure. Do not direct the jet
towards electrical components or bearings.
Do not rinse hot surfaces, for example, the engine and
exhaust system.
Clean the machine immediately after use
Avoid using a high pressure washer or a steam cleaner.
Lubricate the machine if necessary after cleaning.
Carry out extra lubrication when the bearings have
been exposed to a degreaser or a water jet. There is a
major risk of water penetrating into bearings and
electrical connections. Corrosion attack, which will
lead to running problems. Cleaning additives generally
aggravate the damage.
Check and clean if dirt collects in the area for the
circuit card and on the circuit card. Clean using a dry
method, i.e. with a vacuum cleaner or compressed air.
Do not blow directly on the circuit card. Do not rinse
with water. There is a risk of damaging the circuit card.
Removing the machine’s covers
Engine cover
1. Open the engine covers on both sides.
2. Remove the screws holding the engine cover.
3. Lift off the engine cover.
Assemble in the reverse order.
Checking radiatorgrilles
Engine cover’s mounting screws
Clean the radiator grille behind the driver's seat:
Fold the driver's seat up.
Check that the radiator grille is free of leaves, grass,
and dirt.
A clogged radiator grille impairs the cooling of the
engine, which may result in engine damage.
If necessary, remove the radiator grille and clean it.
Check when the grille has been removed whether the
heat exchanger is dirty. Clean if necessary.
See “Cleaning the radiator's heat exchanger” on
page 80.
Radiator grilles
Cleaning the radiator's heat exchanger
Remove the radiator grille. If the dirt is mixed with oil,
first spray cold degreasing agent and wait
approximately 5 minutes. Then flush the radiator with
water jets from the engine compartment. Dirt mixed
with oil, can be due to a leaking hydraulic oil cooler.
Contact an authorised service workshop for repair.
Adjusting the pump and generator drive belts
1. Slacken off the adjustment screw 1/2 turn.
The radiator's heat exchanger
2. Pry out the generator using a screwdriver or
similar until the belt can be pressed in
approximately 1 cm (3/8”) with moderate thumb
pressure between the pump and generator.
Slacken off, if necessary, the generator’s lower
mounting screw if the belt cannot be tensioned.
Caution: Do not pry against the generator housing,
pry against the bearing shield, see image.
3. Tighten the adjustment screw.
4. Check tighten the generator’s mounting screw.
Adjusting the generator drive belt
Replacing the pump and generator drive belts
1. Release the belt tension for the pump and
generator drive belts completely and pry off the
belts. If necessary, slacken off the generator’s
lower mounting screw slightly if the generator is
securely fastened.
2. Install a new belt.
3. Adjust the pump and generator belts as above.
Checking and adjusting the throttle control
Do not adjust the stop screws on the regulator
housing, the engine’s warranty may become invalid.
If doubts arise, contact a Husqvarna service workshop.
Checking the exhaust system
Check regularly that the muffler is complete and
secured correctly. Check that the pipe is not cracked
or leaks.
Temperature variations and vibrations can mean that
the tightening torque for the screws drops. The screws
should be checked when servicing to guarantee the
correct torque. The tightening toque should be about
20 Nm. Never use a defective muffler.
The muffler gets very hot in use and remains so for a
short time afterwards. Contact can result in burns.
Remember the risk of fire.
Adjusting the parking brake
Brake adjustment should be carried out by a
Husqvarna workshop.
Parking brake control
A poorly adjusted parking brake can result in
reduced braking ability.
1. Raise the machine so that the wheels rotate freely.
2. When the parking brake has been released, check
that partial braking of the front wheels does not
3. Check that the braking effect is even and that the
wheels stop with normal pedal travel.
4. Check that the pedal can be locked in the applied
position with normal pedal force.
5. Adjust as necessary using the wires' adjuster
screws (R and L).
Servicing the air filter
If the engine seems to lack power or does not run
smoothly this may be because the air filter is clogged.
When driving with a dirty air filter, the engine does not
receive enough air, which does not meet the
environmental demands, and the engine does not
operate at full efficiency.
It is important to replace the air filter regularly (see
See “Maintenance Schedule” on page 71 for the
proper service interval).
Emptying the particle trap
Compress so that the rubber tabs open and any
particles can drop out.
Particle trap on air filter
Cleaning the cyclone filter
Remove the cover held in position by two brace locks
and clean the inside of the cover. Wash with soap
water and blow dry using compressed air after
removing the cover.
It is important that the particle trap is turned
straight down when installing the cover.
Cyclone filter
Replacing the air filter
Remove the cover held by two brace locks. Pull the air
filter cartridge straight out and remove it.
Wipe the inside of the air filter housing dry. If
necessary, dampen the cloth with white spirit or fuel.
Water or compressed air must not be used.
Install a new air filter cartridge with the hole inwards
and press into position. It is important that the particle
trap is turned straight down when installing the cover.
Air filter cartridge
Do not use compressed air to clean the paper filter.
Do not wash the paper filter.
Do not oil the paper filter.
Bleeding the fuel system
If you have run out of fuel, the fuel system must be
bled. Facilitatebleeding by pumping using a hand
pump. Remove the fuel tank filler cap and check the
return fuel to the tank. When bubble free fuel flows to
the tank, the engine can be started.
Carry out full bleeding as follows:
1. Slacken off the bleed screw on the fuel filter holder
at least 1/2 a turn.
2. Pump using the hand pump until clean fuel,
without air bubbles, exits the drain hole. Tighten
the screw moderately.
Hand pump
3. Slacken off the bleed screw on the injection pump
at least 1/2 a turn. Pump using the hand pump until
clean fuel, without air bubbles, exits the drain hole.
Tighten the screw moderately.
4. Rotate the engine with the starter motor for a
maximum of 15 seconds. Wait 30 seconds before
the next start attempt.
Bleed screw on fuel filter holder
Servicing the fuel filter
All action taken in the fuel system requires utmost
cleanliness to prevent damaging the injection pump.
Use a qualified technician. Damage caused by poor
hygiene is not covered by the warranty.
The fuel filter must be replaced regularly, for intervals
see Maintenance schedule, page 71, or if the feed
pressure, has dropped below the permitted value due
to a blocked filter. Low feed pressure can also be due
to poor fuel hygiene, e.g. defective excess flow valve.
The fuel filter should be replaced by a qualified
technician, there is a risk of damaging the injection
pump if carried out incorrectly. Contact your
Husqvarna workshop.
Fuel filter
Used fuel filters areare environmentally hazardous
Checking the Tyre Pressures
The tyre pressure must be 100 kPa / 1.0 bar / 14.5 PSI
for the front and rear wheels.
The air pressure in cutting unit's pivot wheels should
be 150 kPa / 1.5 bar / 21.8 PSI.
Different air pressure in the front tyres or pivot
wheels will result in the blades mowing the grass at
different heights.
Tyre pressures
Servicing the battery
The machine is equipped with a sealed “maintenancefree” battery. The battery has an inspection hole that
displays different colours:
• Green = OK.
• White = Charge the battery.
• Red = Replace the battery.
What to do in case of contact with battery acid:
- External: Rinse thoroughly with water.
- Internal: Drink large quantities of water or milk.
Contact a doctor as soon as possible.
- Eyes: Rinse thoroughly with water.
Contact a doctor as soon as possible.
The battery emits explosive gases. Sparks, flames,
and cigarettes must not be present in the vicinity of
the battery.
Clean the battery and holder with soap water solution. Discarded / replaced batteries must be handled as
environmentally hazardous waste.
The machine’s electrical system is fused by three
different types of fuse:
1. Automatic fuses; These reset automatically after a
short-circuit in the circuit. No corrective action
required by the operator.
2. Fusible link of the high output type; Replaced by
the operator.
FU12 is located in a box on a bracket behind the battery
and FU13 in a box on the top of battery's positive pole.
FU12 50 A Supply fuse for the printed circuit board.
FU13 125 A Main fuse.
If FU12 blows only the indicator panel works.
If FU13 blows the entire machine will be dead.
Replacing fuses: Open the box cover and replace the
fuse, which is secured by two nuts.
3. The fusible links are of the flat pin type. Replaced
by the operator.
These fuses are located in two places. One fuse
behind the battery:
10 A Red
Control circuit (max. 10A).
If FU3 blows the entire machine will be dead.
Fuses FU3, FU12
The circuit fuses are located on the circuit board under
a cover on the control panel’s right-hand side. If any of
these fuses trip, only the relevant circuit has no power.
10 A Red
Power take-off’s magnetic clutch
10 A Red
Solenoid valves hydraulic system
10 A Red
Indicators, signal, hazard warning lights
10 A Red
Extra voltage outlet 2
20 A Yellow
Cooling fan
10 A Red
Extra voltage outlet 1
20 A Yellow
Starter motor engagement
10 A Red
FU10 7,5 A Brown
Lighting traffic kit
FU11 10 A Red
Power outlet 12 V
Circuit fuses, location
Do not use any other type of fuse when replacing.
A blown fuse is indicated by a burnt connector. Pull the fuse outwards when replacing. A tool is hung on a cable
behind the cover.
The fuses are there to protect the system. If it blows again shortly after replacement, it is due to a short circuit, which
must be fixed before the machine can be put into operation again.
Checking the Safety System
PT 26D is equipped with a safety system that prevents
starting or driving under the following conditions.
The engine can only be started when the parking
brake is applied and the drive pedals are unactuated.
If the cutting unit is connected, it is disengaged and
must be re-engaged.
The driver does not need to be seated in the driver’s
The engine and cutting unit must stop if the driver
leaves the driver’s seat when the parking brake is not
applied or if any driving pedal is affected. There is a
small delay to prevent stoppages should the driver
bounce in the seat.
If you attempt to drive without releasing the parking
brake the machine stops.
If the safety system is deployed, the switch for
operating the cutting unit must be pressed in and
pulled out again for the cutting unit to work.
Make daily inspections to ensure that the safety
system works by attempting to start the engine or drive
when one of the conditions to start or operate is not
met. Change the conditions and try again.
Replacing the bulb in the headlight
Applies to the headlight lamp.
For information about the bulb type, see “Technical
When the plastic covers are removed, the unit with
warning lamps is released. Do not damage it.
1. Remove the plastic covers (41+43) surrounding
the steering wheel console.
2. Disconnect the cable (Caution! plastic hooks) and
carefully lift off the unit with warning lamps (39).
3. Remove the headlight console (34) from the
steering wheel console, 4 x screws. (If the
headlight insert is removed from its mounting
frame, the headlight must be realigned.)
4. Disconnect the electrical terminal from the bulb.
Headlight, parts
Do not touch the bulb glass with your fingers. Finger
prints evaporate and mark the reflector.
5. Fold the wire loop for headlight lamp to one side
and replace the bulb.
6. Assemble in the reverse order.
Light setting
Place the machine at least 5 m from a wall. The
machine must stand flat.
The steering wheel console must be in the rear
Switch on the headlights.
The low beam's upper limit line must fall 1 cm for each
metre distance to the wall, measure from the centre of
the headlight.
Adjust with the screws (36) if necessary. These are
accessible once the rear plastic cover around the
steering wheel console has been removed.
The Cutting Unit Components
The components mentioned are:
A Pin
B Link joint
C Cutting unit mountings
D Cutting height settings
E Propeller shaft with quick couplings
F Service handle
G Drive belt with cover
H Bevel gear
The Cutting Unit Components
Attaching and removing the cutting unit
Exercise caution. Risk of crush injuries. Wear
protective gloves
See “Side shifting the cutting unit” on page 96.
Side shifting the cutting unit
Cutting unit, Combi 155, can be side shifted 8 cm to
the left or be centrally positioned on the machine.
1. Stop the engine. Switch off the weight transfer switch.
Never leave the propeller shaft on the machine with
one end detached. If the engine starts, damage might
Remove the propeller shaft
2. Remove the propeller shaft completely. Pull the
ring to release the quick connector and to be able
to pull the propeller shaft from the shaft journal.
3. Start the engine and raise the cutting unit to the
transport position.
4. Stop the engine.
5. Remove the pins on both sides.
6. Lower the cutting unit to the mowing position.
When the engine has stopped: Ignition switch in
the ON position and the lever in the lowered
position within 3 seconds, otherwise turn the
ignition switch again.
Remove the pins
7. Remove the pins from the shafts and remove the
shafts from the link joints.
8. Remove the screws for the bearing brackets.
9. Remove the adjustment screw from its mounting.
TIP! Measure where the lock nut is located on the
adjustment screw.
Release the link joints
10. Move the cutting unit sideways to the new position.
11. Screw in the adjustment screw for the tilt angle a
few turns. Left-hand position green, right-hand
position red, see figure.
12. Move the dampers to the new position. Left-hand
position green, right-hand position red, see figure.
13. Install the bearing brackets. Left-hand position
green, right-hand position red, see figure. The
right-hand bearing bracket must be installed in the
mounting in the cover to prevent movement
against the underneath of the unit mounting’ s
Position L green, Position R red
14. Continue to screw in the adjustment screw for tilt
15. Install the shaft for the link joint and its pins on both
16. Start the engine and raise the cutting unit to the
transport position.
17. Stop the engine.
Adjustment screw tilt angle
18. Install the pins on both sides.
19. Lower the cutting unit to the mowing position.
(Ignition switch, see point 6)
20. Fit the propeller shaft.
21. Check and adjust the cutting unit tilt angle. See
“Tilt angle” on page 100.
Install the pins on both sides
Setting the cutting height and tilt angle
When a new cutting unit is attached, you need to
adjust the tilt angle and cutting height.
Adjustment must be made in the stated order.
Starting position:
Check the air pressure in the tyres 100 kPa / 1,0 bar /
14,5 PSI and 150 kPa / 1.5 bar / 21.7 PSI for the pivot
The cutting unit must be lowered on a flat surface.
Right-hand cutting height adjustment
When replacing the cutting unit, you must readjust
the tilt angle and cutting height.
Cutting height
1. Release the cutting height setting handle.
2. Set the same height at all three setting points.
3. Tighten the cutting height handle by hand.
Left-hand cutting height adjustment
4. Set the handle for cutting height setting. Release
the handle by pressing in the button and turning it
to the horizontal position, so that it does not catch
on bushes etc.
The height interval is between 25 - 127 mm (1”- 5”),
7 positions.
Tilt angle
The machine must be on a flat surface.
1. Check the tyre pressures 100 kPa / 1.0 bar / 14.5 PSI
and 150 kPa / 1.5 bar / 21.7 PSI for the pivot wheels.
2. Measure the distance between the ground and the
front and rear edges of the unit.
Rear cutting height adjustment
3. The rear edge of the cutting unit should be 6 - 9 mm
(1/4” - 3/8”) higher than the front edge of the unit.
4. Unscrew the lock nut and turn the adjustment
screw. Extend the stay in order to raise the rear
edge of the cutting unit.
5. Then tighten the lock nut to the mounting.
Ground pressure
The ground pressure is hydraulically governed in the floating
position. With weight transfer engaged, a lower ground
pressure on the unit's pivot wheels is obtained while the
ground pressure on the machine's front wheels is increased.
Can only be adjusted by an authorised workshop.
Adjusting the tilt angle
The Cutting Unit’s Service Position
In order to provide good accessibility for cleaning,
repair and servicing, the unit can be set in the service
position. The service position means that the unit is
raised and locked in the vertical position.
Placing in the Service Position
1. The cutting unit must be in the lowered position
and the engine off.
2. Disconnect both quick couplings for the propeller
shaft under the service hatch and remove the
propeller shaft.
Service position
Never leave the propeller shaft on the machine with
one end detached. If the engine starts, damage might
3. Start the engine and raise the cutting unit to the
transport position.
4. Stop the engine.
Propeller shaft
5. Remove the pins on both sides.
6. Tilt the cutting unit.
7. Secure the cutting unit with the pin in the service
handle. Keep track of the hairpin spring.
8. The cutting unit in the service position.
Releasing the Service Position
Images, see “Placing in the service position”.
1. Remove the pin from the service handle and lower
the cutting unit.
Right-hand side pin
2. Install the pins on both sides.
3. Lower the cutting unit to the mowing position.
When the engine has stopped, the ignition switch
must be in the ON position and the lever in the
lowered position within 3 seconds, otherwise turn
the ignition switch again.
4. Fit the propeller shaft and close the service hatch.
Fit the cover screw.
The propeller shaft only fits one way.
Securing in the service position
Cutting Unit Model
PT 26D can be equipped with two different types of
cutting unit:
Combi 132
Combi 155
The digits indicate the cutting width in cm.
Older types of cutting unit cannot be attached.
Combi 155 can be mounted 8 cm (3 1/8") to one side
in relation to the machine.
Combi 132
Check that the blades’ securing screws are tightened
with the torque:
Combi 132 and 155: 75 - 80 Nm / 53 - 56 lbft.
Combi 155
Checking the Blades
Protect your hands with gloves when working with
the blades. Risk of cutting.
Sharpening blades
It is important that the blades are undamaged and
well-ground to give the best mowing result.
Replacement or sharpening of the blades should be
carried out by an authorised service representative.
The blades should be balanced after sharpening.
Damaged blades should be replaced when hitting
obstacles that result in a breakdown. Let the servicing
dealer judge whether the blade can be repaired/
ground or must be discarded.
Balancing blades
If the blades are cracked, whether caused by poor
repair or other damage, they could break while being
used. Cracked and defective blades must always be
replaced. The risk increases if the blades are poorly
Replacing the power take-off belts
Always replace the belts in pairs.
1. Remove the driver's seat.
2. Remove the protective cover above the hydraulic
pump's drive shaft.
3. Remove the ignition keys from the machine.
4. Release (1) the drive shaft from the hydraulic
pump and remove the spacer ring (2) from the
Drive shaft spacer ring
5. Undo the locking nut (3) and the lower screw (4) for
the belt tensioner. Remove the belt tensioner.
6. Do not unscrew the centre bolt in the drive shaft.
Remove the rear bearing bridge’s screws (5) and
the spacer washer (6).
7. Cut off the old belts.
8. Insert the new belts through the gap between the
spacer ring and the hydraulic pump and then
through the gap between the bearing bridge and
the mounting. First position one of the belts on the
pump pulley and then on the lower pulley. Repeat
the same procedure with the other belt.
Belt tensioner and spacer washer
9. Fit the spacer washer (6) for the bearing bridge
and the spacer ring against the pulley with the
accompanying screws (5).
10. Fit the belt tensioning screws with springs and
sleeve. Tighten the screws until the sleeve touches
the frame mounting (4). Tighten the locking nut (3).
11. Check the tension of the belts 25 hours after
changing the belts.
Adjusting the power take-off belts
Tighten the screws until the sleeve touches the frame
mounting (4). Tighten the locking nut (3).
Fitting new power take-off belts
Replacing the cutting unit belt
Protect your hands with gloves when working with
the blades. There is a risk of crush injuries when
working with the belt.
Replacing the belt on the Combi unit
Relieving the spring
On these cutting units with “collision-proof” blades, the
blades are driven by one V-belt. Do as follows to
replace the V-belt:
1. Dismantle the cutting unit. See “Side shifting the
cutting unit” on page 96.
2. Remove the screws for the covers. Lift off the
protective covers from over the belts.
3. Pry off the old belt from the belt pulleys. Use a pry
bar if necessary to offload the spring and release
the belt tension.
Belt tightening
4. Slacken off two screws and remove the three
others for the gear housing. Turn the gear housing
so that the belts can be moved under the pulley.
5. Check that the belt tensioning equipment is not
jammed or binding and replace the spring.
6. Position the new belt and reinstall the gear
7. Attach the new belt.
The belt position decal is on the cutting unit under
the protective cover.
8. Install the protective covers.
9. Attach the cutting unit to the machine. See “Side
shifting the cutting unit” on page 96.
Gearbox turned
Removal of BioClip Plug
To change a Combi unit from the BioClip function to a
cutting unit with rear ejection, remove the BioClip plug,
which is located under the unit.
1. Put the unit in the service position. See “The
Cutting Unit’s Service Position” on page 101.
2. Remove the screws holding the BioClip plug, and
remove the plug.
Tip: Fit the fully threaded screws
M8x15 mm in the screw holes to protect the threads.
Removal of BioClip Plug
3. Return the unit to the normal position.
Fit the BioClip plug in the reverse order.
Chapter 7: Lubrication
Lubrication Schedule
When in daily use, the weekly lubrication (40 h) schedule should be carried out twice a week.
= Filter replacement
The position numbers for the lubrication points refer to
the lubrication instructions on the following pages.
= Oil Change
Remove the ignition key to prevent unintentional
movements during lubrication.
= Brush
= Level check
= Grease nipple
When lubricating with an oilcan, it ought to be filled
with engine oil. When lubricating with grease, unless
otherwise stated, grease 503 98 96-01 or another
chassis or ball bearing grease offering good corrosion
protection shall be used.
Symbols on the lubrication chart
With daily use, the machine shall be lubricated twice
A. Radiator grille, See “Checking radiatorgrilles” on
page 79.
Wipe away excess grease after lubrication.
B. Pump and alternator belt, See “Replacing the
pump and generator drive belts” on page 81.
Lubricating the cables
C. Power take-off belts, See “Replacing the power
take-off belts” on page 105.
Grease both ends of the cables and move the controls
to end stop positions when lubricating. Re-attach the
rubber covers on the cables after lubrication. Cables
with sheaths will jam if they are not lubricated
regularly. A jammed cable may cause malfunction,
such as the parking braking being applied.
= Oil can
D. Coolant, See “Cooling system” on page 50.
E. Cutting unit belt, See “Replacing the cutting unit
belt” on page 107.
F. Air filter, See “Servicing the air filter” on page 84.
G. Fuel filter, See “Servicing the fuel filter” on
page 87.
Maintenance actions on the lubrication chart
Lubrication or other maintenance of optional
equipment or accessories, see “Accessories” on
page 55, is not described in this manual. This
equipment too, naturally, requires maintenance. See
the manuals for the respective accessories for
Lubricating in Accordance with the
Lubrication Schedule
The numbers in the following headings refer to the
lubrication points as described in “Lubrication
Schedule” on page 111 and
“General” on page 112.
Pivot wheel bearings
1. Pivot wheel bearings
4 nipples (wheels and pivot shaft bearing), lubricate
using a grease gun until grease is forced out.
2. Handle for cutting height setting
Lubricate the front and rear handles using the oil can.
Cutting height setting handle
3. Cutting unit’s bevel gear
Sight glass on the plug on the front of the bevel gear.
Check the level when the cutting unit is in the lower
position. When filling, raise the cutting unit to the
transport position and remove the plug with the sight
Fill with transmission oil SAE 80.
Changing the oil
Drain the bevel gear through the sight glass with a
suction hose equipped with a plastic hose, which
reaches the bottom of the housing.
Cutting unit’s bevel gear
Alternatively; remove the cutting unit and plastic
covers. Place the cutting unit on its top edge and drain
the bevel gear through a plug.
Fill the bevel gear with 0.6 litres of oil.
4. Propeller shaft’s joints
The propeller shaft joint’s 2 nipples, one nipple on the
front and rear joint. Remove the propeller shaft (See
“Side shifting the cutting unit” on page 96.) and
lubricate using a grease gun until grease is forced out.
Also lubricate the telescopic joint on the propeller shaft
with grease.
Propeller shaft’s joints
5. Lift cylinder
2 nipples, one at each end of the cylinder. Lubricate
using a grease gun until grease is forced out.
Lift cylinder
6. The power take-off shaft’s front support bearing
Lubricate using a grease gun until grease is forced out.
The power take-off shaft’s front support bearing
7. Engine Oil
Viscosity and quality
Use engine oil viscosity as illustrated, class API CH4
or ACEA E5 or higher.
5W 20
10W 30
The engine holds 2.5 litres of oil excluding the filter
(including filter 2.7 litres).
15W 40
20W 50
-20 -10
-4 -14
Viscosity chart
30 40 50 C
86 104 122 F
Checking the oil level
Check the oil level in the engine when the machine is standing
horizontally with the engine switched off.
Remove the dipstick and wipe it clean. Then insert the
dipstick again.
Take the dipstick out again and read the oil level.
The engine dipstick
The oil level should be between the markings on the
dipstick. If the level is approaching the “ADD” mark,
lower notch, top up the oil to the “FULL” mark, upper
notch on the dipstick.
Dipstick marking
Filling engine oil
The oil filler opening is on the valve cover. Never fill
above the “FULL” mark (upper notch on the dipstick).
Fill the oil slowly. Reinstall the dipstick before starting
the engine. Start and run the engine at idling speed for
approx. 30 seconds. Turn off the engine. Wait 30 seconds
and check the oil level. If necessary fill so that the oil
comes up to the “FULL” mark on the dipstick.
Changing the Engine Oil
The engine oil should be changed the first time after
25 hours running time. It should then be changed after
every 250 hours of running time.
Engine oil can be very hot if it is drained directly
after stopping the engine. Allow the engine to cool
somewhat first.
Change the oil when the engine is at a temperature
hot enough for any dirt to flow out easier.
Oil filler opening
Used engine oil is a health hazard and must not be
disposed of on the ground or in nature; it should
always be disposed of at a workshop or appropriate
disposal location.
Avoid skin contact; wash with soap and water in case
of spills.
1. Position the wheels fully to the left.
Drain plug
2. Place a vessel underneath the drain plug.
3. Remove the dipstick. Remove the drain plug on
the oil pan and allow the oil to run into the vessel.
4. Clean and install the drain plug and tighten.
5. Replace the oil filter if necessary. See
“7. Replacing the engine’s oil filter” on page 120.
6. Fill with oil. See “Filling engine oil” on page 118.
7. Run the engine to operating temperature, then
check that there is no leakage from the oil plug or
oil filter.
8. Check the oil level, top up if necessary.
7. Replacing the engine’s oil filter
Risk of spray and burn injuries. The engine’s oil
filter may be very hot immediately after stopping.
Allow the engine to cool somewhat first.
Engine oil filter
Replaced filters must be handed in to the workshop
or other allotted place for disposal.
Avoid skin contact; wash with soap and water in case
of spills.
1. Remove the oil filter. If necessary, use a filter
2. Clean the oil filter’s mounting.
3. Wipe new, clean engine oil onto the seal for the
new filter.
4. Fit the filter by hand until it mates + 3/4 turns.
5. Run the engine warm, then check that there are no
leaks around the oil filter seal.
6. Check the oil level in the engine, top up if
necessary. The oil filter holds 0.2 litres of oil.
8. Hydraulic oil
Viscosity and quality
Hydraulic oil ISO VG.
Viscosity 46 cSt.
Local regulations may affect the choice of hydraulic oil
due to environmental reasons, consult your
Husqvarna workshop at the relevant location.
Inspection off the oil level
Open the right-hand engine cover and check the level
against the level marking. The level should be between
the MAX and MIN line.
Filling hydraulic oil
Remove the engine cover. See “Engine cover” on
page 79. Fill with hydraulic oil to approximately 60 mm
(2 1/4”) below the strainer’s upper edge.
Changing hydraulic oil
Used hydraulic oil is a health hazard and must not be
disposed of in the ground or in nature.
Replaced filters must be handed in to the workshop
or other allotted place for disposal.
Avoid skin contact; wash with soap and water in case
of spills.
Hydraulic oil and filters should be changed by an
authorised Husqvarna workshop.
Oil level, hydraulic tank
8. Hydraulic oil filter, change
Hydraulic oil filters should be changed by an
authorised Husqvarna workshop.
9. Cutting unit mounting
Lubricate ball joints and shafts with the oil can.
Cutting unit mounting
10. Lifting arm’s rear bearings
2 nipples, one on each side. Lubricate using a grease
gun until grease is forced out.
Rear storage bearing
11. Driver’s Seat
Tilt the seat back.
Lubricate the lengthways adjustment mechanism with
the oilcan.
Lubricate the lengthways adjustment runners with
grease. Pull the seat back and forth and lubricate on
both sides.
Driver’s Seat
12. Parking brake cables
See “Lubricating the cables” on page 112.
Lubricate the upper ends of the cable.
Remove the cable’s rubber casing (R and L) when
Lubricate the cable with an oil can, apply the parking
brake a few times and lubricate again.
Parking brake cables
13. Control cylinder
2 nipples, one at each end of the cylinder, lubricate
using a grease gun until grease is forced out.
Control cylinder
Trouble Shooting Guide
Chapter 8: Trouble Shooting Guide
Check the machine refer to this guide before contacting your service workshop.
The engine will not start.
Fuel tank empty
Incorrect fuel type
Air in fuel system
The glow plug system is not working (Fuse FU7)
Serious engine damage
Glow plugs do not heat up
The pedals are affected
Brake not applied
Hydrostat pedals not in the neutral position
Discharged battery
Poor contact affecting the battery terminal cable
connections, starter switch, or starter motor
Blown fuse on or by the battery (check 3)
Defective starter switch
Faulty starter
Starter does not turn the engine
Trouble Shooting Guide
The engine runs erratically
Air in fuel system
Defective excess flow valve
Blocked fuel filter
Low feed pressure
Clogged air filter
Blocked fuel tank ventilation
Disconnected fuel line (diffuser jet)
Defective injector
Defective injection pump
Defective feed pump
Incorrect fuel type
Serious engine damage
Trouble Shooting Guide
Abnormal exhaust smoke
Black smoke:
Incorrect fuel quantity from injection pump
Defective injector
Incorrect timing of injection pump
Clogged air filter
Blue smoke:
Engine oil level too high
Serious engine damage
White smoke:
Defective cylinder head gasket
Cracked cylinder head
Engine oil level too high
Trouble Shooting Guide
The engine lacks power
Air in fuel system
Clogged air filter
Fuel filter blocked
Defective excess flow valve
Low feed pressure
Defective feed pump
Incorrect timing of injection pump
Serious engine damage
Engine overloaded
Coolant level too low
Air intake or radiator blocked with grass or dirt
Fan damaged or not working
Too little or no oil in the engine
Defective radiator cap
Broken coolant pump drive belt
Engine overheating
Trouble Shooting Guide
Battery does not charge
One or more battery cells faulty
Poor contact on the battery terminal cable connectors
Defective generator
Generator drive belt broken or slipping
Breakage on cables to the generator
Insufficient battery maintenance
Sulphated battery
The blades are loose
Damaged universal joint
The engine is loose
The hydraulic pump is loose
Damaged support bearings for power take off shaft
The bevel gear is loose
The engine is not running on all cylinders
Pulley loose or bearings worn in cutting unit
One or more blades imbalanced, caused by damage
or poor balancing after sharpening
The machine vibrates
Trouble Shooting Guide
Uneven mowing results
Blades blunt
Cutting unit set incorrectly
Long or wet grass
Grass build-up under the cover
Different air pressure in the right and left tyres
Different air pressures in the tyres on the pivot wheels
Driving speed too high
Engine speed too low
The belt in the cutting unit slips
Power take-off belt slips
Too low cutting height
Chapter 9: Storage
Winter Storage
At the end of the mowing season, the machine should
be readied for storage (or if it will not be in use for a
long period).
There is less of a risk of corrosion damage if the
machine is cleaned and stored in a dry environment.
Diesel is stable and can be stored until next season.
Fill the fuel tank up to prevent condensation. If the
machine is to be used during the winter, for snow
clearing for example, the tank should be filled with
winter fuel.
Ensure that any leaking fuel or oil cannot run into floor
Ensure that the cooling system has sufficient
antifreeze. If the cooling system is drained, you must
ensure that both the engine block and radiator do not
contain water when there is a risk of freezing.
Never store an engine with fuel in the tank in poorly
ventilated spaces where fuel vapour can come in
contact with open flames, sparks, or a pilot light such
as in a boiler, hot water tank, clothes drier, etc.
Handle the fuel with care. Careless use can cause
serious personal injury and property damage. Never
use petrol for cleaning. Use a degreasing agent and
warm water instead.
To ready the machine for storage, follow these steps:
1. Thoroughly clean the machine, especially under
the mower deck. Touch up damage to the paint to
prevent rust.
2. Inspect the machine for worn or damaged parts
and tighten any nuts or screws that may have
become loose.
3. Change the engine oil; dispose of properly.
4. Lubricate all grease nipples, joints, and shafts.
5. Remove the battery. Clean, charge, and store in a
cool place. Maintenance charging is
recommended. An inappropriate charger will
destroy the battery. Contact your Husqvarna
dealer for suitable chargers.
6. Store the machine in a clean, dry place and cover
it for extra protection.
A protective canvas cover is available as an
accessory from your Husqvarna supplier.
Low season is the most suitable time to perform a
service or overhaul of the machine in order to ensure
high function safety during high season.
When ordering spare parts, please specify the
purchase year, model, type, and serial number.
Always use genuine Husqvarna spare parts.
An annual check-up at an authorised service
workshop is a good way to ensure that your machine
performs its best the following season.
Ready for next season?
Electrical system
Chapter 10: Electrical system
1. Headlight
2. Indicator panel
3. Control panel
4. Circuit board
5. Circuit fuses
6. Starter
7. Generator
8. Sensor engine temperature (2)
9. Oil pressure sensor
10. Fuses and main relay
11. Main fuse
12. Battery
13. Magnetic coupling for
power take-off
Electrical system, component locations
Hydraulic System
Chapter 11: Hydraulic System
Hydraulic System, Component Locations
Quick couplings, see diagram
Lift cylinder
Control cylinder
Control unit
Valve block working hydraulics
Valve block transmission
Wheel motors
Hydraulic pump Control and air system
Hydraulic pump Drive system
Inlet strainer
Hydraulic cooler
Hydraulic filter
Hydraulic tank
Hydraulic System
Hydraulic diagram
Hydraulic System
Keep the hydraulic system clean. Remember to:
Thoroughly clean before the top-up cap is opened
or any connector loosened.
Use clean containers when topping up the oil.
Only use pure oil that has been stored in a sealed
Do not reuse drained oil.
Change the oil and filter according to the intervals
specified in “Maintenance Schedule” on page 71.
In order for a hydraulic system to function without
problem, it must be free from foreign objects. When
used, the system produces particles, which can cause
both wear and abnormal function. In order to remove
these particles, the system contains filters. The filters
are sized so as to capture the produced particles, but if
contaminants are introduced from outside the system,
the filters can quickly become clogged and fail to
function as intended. If there are contaminants in the
system, further contamination will be produced in a
self-propagating cycle. The result will be operating
disruptions and much work to clean the system.
Fuel system
Chapter 12: Fuel system
Fuel system with in-line pump has excellent
operational reliability as long as the fuel is kept clean.
If contaminated fuel is filled or enters the system in the
incorrect manner, the risk of malfunction or wear/
damage to the injection pump increases.
Contaminants include dust particles or in the form of
liquid, such as water or petrol.
The fuel in the tank is drawn up by the feed pump and
pushed through the fuel filter to the injection pump’s
fuel chamber. The feed pump supplies a greater
quantity of fuel than the injection pump requires.
Consequently, there is an overflow pipe on the
injection pump, which leads off surplus fuel and
maintains the feed pressure in the fuel chamber. The
excess is routed away via the injector’s leak oil line
back to the tank.
There is a hand pump on the fuel filter, which is used
to bleed the fuel system.
The injection pump pumps fuel to the injectors, which
are opened by the pressure and then spray the fuel
into the prechambers, where it is ignited by the
compression heat.
Hand pump
Fuel system
Fuel system
Technical Data
Technical Data
PT 26D
Excluding cutting unit
Length, base machine
2070 mm / 6.79 ft
Width, base machine
1170 mm / 3.83 ft
1300 mm / 4.26 ft
Operating weight, base machine
600 kg / 1322 lb
1180 mm / 3.87 ft
Tyre dimensions
Tyre pressure, machine
100 kPa / 1.0 bar / 14.5 PSI
Tyre pressure, pivot wheel
150 kPa / 1.5 bar / 21.7 PSI
Precombustion chamber diesel, 3-cylinder in-line engine
26/19.7 hp/kW @ 3000 rpm
Technical Data
PT 26D
1131 cm3
min 45 Cetane
2.0 - 4.5 cSt @ 40 °C
0.835 - 0.855 kg/l
Sulphur< 0.2 w%
Tank volume
37.5 liters/9.9 US Gal
Viscosity see page116
Class API CH4 or ACEA E5
Oil volume
2.5 litres/2.6 US qt
Oil volume including filter
2.7 litres/2.9 US qt
Electric start
Cooling system
Water cooled
approximately 5 litres
Antifreeze fluid
BS6580-1992, ASMD3306-89, AS2108-1977
Electrical system
12 V, negative grounded
Technical Data
PT 26D
12 V, 40 Ah
Main fuse
125 A
Supply fuse circuit board
50 A
Fuse Yellow
Flat pin 20 A
Fuse Red
Flat pin 10 A
Fuse Brown
Flat pin 7.5 A
Bulb headlight
12 V H4
Hydraulic System
Max. working pressure
210 bar/3050 PSI
Power steering circuit max. working pressure
120 bar/1740 PSI
Manufacturer and type
Pump Danfoss LPV25 25 cc variable annular piston
Front Sauer-Danfoss OEMV 160 cc
Rear Sauer-Danfoss OEMV 125 cc
ISO VG 46 cSt
Oil volume, total including hydraulic system
13 litres
Technical Data
PT 26D
Maximum speed
Forwards, high speed
18 km/h
Forwards, low speed
13 km/h
Reverse, low speed
13 km/h
Max inclination, all directions
Cutting unit
Combi 155
Cutting width
1550 mm/61"
Cutting heights
25.4 - 127 mm / 1" - 5"
Blade length
560 mm/22"
1610 mm / 5.28 ft
113 kg / 248 lb
Length machine with unit
approximately 2800 mm / 9.19 ft
Bevel gear, oil volume
0.6 litres
Cutting unit
Combi 132
Cutting width
1300 mm / 51.2"
Technical Data
PT 26D
Cutting heights
25.4 - 127 mm / 1" - 5"
Blade length
490 mm/19.3"
1340 mm / 52.8"
approximately 100 kg / 29.3lb
Length machine with unit
approximately 2730 mm / 8.96 ft
Bevel gear, oil volume
0.6 litres
Noise emissions with unit C155
Measured noise level
103 dB(A)
Guaranteed noise level
104 dB(A)
Noise emissions with unit C132
Measured noise level
102 dB(A)
Guaranteed noise level
102 dB(A)
Technical Data
When this product is spent and is no longer used it
should be returned to the dealer or other authority
for recycling.
In order to introduce improvements the specification
and design are subject to alteration without prior
Note that no legal demands whatsoever can be made
with the support of the information in this operator’s
Only use original spare parts with repairs. The use of
other parts invalidates the warranty.
Design standards
Design standards
EU Declaration of Conformity (only applies to Europe)
Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: +46-36-146500, declare under sole responsibility that the
Husqvarna PT26D, from 2006’s serial numbers and onwards (the year is clearly stated in plain text on the rating
plate with subsequent serial number), conforms with the requirements of the COUNCIL’S DIRECTIVE:
of June 22, 1998 “relating to machinery” 98/37/EC, annex IIA.
of December 15, 2004 ”relating to electromagnetic compatibility” 2004/108/EG.
of May 8, 2000 “relating to noise emissions into the surroundings” 2000/14/EC.
Information regarding noise emissions and the cutting width, see “Technical Data”.
The following harmonised standards have been applied: EN292-2, EN836.
Registered body 0404, SMP Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden has
issued reports with numbers:
01/901/ 079, 01/901/080 regarding the assessment of conformity according to annex VI to the COUNCIL’S
DIRECTIVE of May 8, 2000 “relating to the emission of noise to surroundings” 2000/14/EC.
Huskvarna January 7, 2009
Claes Losdahl, Development Manager/Commercial Lawn and Garden
Design standards
Diverse design standards
The electrical system is designed to conform to requirements of insurance companies regarding the risk of fire. The
electrical system has an electrical main circuit breaker and max. 10 A in the control circuit. All electrical cables are
protected by a protective hose. The electrical system must not be modified as this can disregard the requirements of
the insurance companies.
The electrical system is designed to satisfy the requirements made by insurance companies on machines with a
price exceeding 2 base amounts.
Accessories 53, 111
Adjusting the steering wheel setting 47
Air filter 82, 83
Air filter cartridge 83
Air intake grille 57
Air pressure 86
Antifreeze 131
Antifreeze agent 50
Automatic dipped beam mode Automatic dipped beam 42
Backrest tilt 34
Battery 87
Battery acid 20
Battery charging 46
Belt position diagram 106
Belt replacement 105
Bevel gear 28, 112
BioClip 52
BioClip plug 107
Bleed screw 84
Bleeding 84
Braking 66
Bulb 91
Cables 110
Catch 33
Cetane rating 37
Children 16
Chronometer 46
Circuit fuses 89
Cleaning 75
Cold 61
Combi 101
Combi unit 52
Contamination 138
Control cylinder 123
Control panel 33
Coolant draining 49
Coolant filling 48
Coolant level 48
Coolant temperature 46
Cooling air intake 77
Cooling system 18, 48
Cutting height 36, 55
Cutting height adjustment 36, 97, 111
Cutting unit 40, 52, 93, 121
Cutting unit belt 105
Cutting unit model 101
Cutting unit operation 46
Cutting unit switch 40
Cyclone filter 82
Dealers 3
Decals 5
Diesel 37, 131
Differential Lock 23, 28, 36, 46
Dirt 138
Drain plug 117
drive shaft 103
Driver’s Seat 120, 122, 139
Driving pedals 32, 65
Electrical system 135
Electro magnetic clutch 28
Emergency starting 62
Engine coolant temperature 48
Engine cover 77
Engine Oil 114
Engine running hours 46
Engine speed 61
Engine starting 59
Environment protection 24, 119
Environmentally hazardous 85
Environmentally hazardous waste 87
Ether 57
EU declaration of Conformity 147
Excess flow valve 139
Exhaust system 80
Extra lubrication 76
Feed pressure 85
Feed pump 139
Filling hydraulic oil 120
Filter 138
Fuel 17, 37
Fuel filter 24, 85, 139
Fuel hygiene 37
Fuel level 37
Fuel system 18, 84, 139
Full beam 46
Fuses 88
Generator drive belt 78
Glow plug heating 42, 46
Glow plug heating position 60
Glycol 50, 131
Ground pressure 98
Hand pump 84, 139
Headlight 42
Heat exchanger 78
High speed 43, 46
Horn 41
Hydraulic lift 38
Hydraulic oil 119
Hydraulic oil filter 121
Hydraulic System 136, 137
Hydrostatic 27
Idling 67
Indicators 41
Injection pump 139
Injectors 139
Inspection hole 87
Oil pressure 46
Oily dirt 75
Ordering spare parts 4
Jump leads 63
Parallelism 98
Parking brake 33, 46, 81
Parking brake cables 122
Parking lights 45
Particle trap 82
Passengers 10
Pedal 32
Pivot wheel bearings 111
Power outlet 45
Power take-off belt 103
power take-off belts 104
Power take-off shaft 28, 113
Power transmission 27
Propeller shaft 28, 94
Propeller shaft’s joints 112
Protective equipment 13
Lift cylinder 113
Lubrication schedule 109
Lumbar support 35
Main fuse 88
Maintenance 17
Maintenance work 24
Measurement gauge 115
Mixing table 51
Modification 2
Mowing Position 39
Mowing result 55, 102
Mowing Tips 55
Muffler 80
Mulching 22, 57
Oil filler opening 116
Oil filter 24, 118
Oil level 115, 120
Oil mixed dirt 78
Radiator grilles 77
Refuelling 37
Risk of freezing 131
Running 64
Safety 9
Safety circuit 40
Safety System 90
Seat 33
Serial Number 4
Service position 99
Sharpening the blades 102
Side shifting 94
Sight glass 37
Slopes 14, 56
spacer ring 103
Spare parts 133
Sparking 19
Speed control 32
Start throttle 57
Starter switch 42
Starting 59
Steering Wheel 35
Steering wheel console 35
Steering wheel console angle 47
Stopping 67
Storage 131
Support bearing 113
Symbols 5
Throttle control 43, 79
Towing 1, 53
Traffic kit 28
Transport 1, 23
Transport Position 38
Type designation 4
Tyre air pressure 86
Tyre pressure 86
Use 2, 9
User responsibility 26
V-belt 28
Viscosity 114, 119
Warning lamps 46
Waste oil 24
Weak battery 62
Winter fuel 38, 131
Winter storage 131
115 15 26-26
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