Operator’s Manual
Post Hole Digger Range
40 HP Model
50 HP Model
75 HP Model
50 HP & 75 HP Hydraulic Down
Pressure Models
ABN 48 099 851 144
ABN 92 626 598
89 Lewis Rd.
Wantirna South
Victoria 3152
22 Sunshine Ave
Te Rapa
Hamilton 2001
New Zealand
Telephone: +61 (03) 9887 2788
Facsimile: +61 (03) 9887 1035
Telephone: +64 (07) 849 6030
Facsimile : +64 (07) 849 6070
No liability can be accepted for any inaccuracies or omissions
in this publication, although due care has been taken to make it
as complete and accurate as possible.
The information, illustrations and technical data
considered to be correct at the time of preparation.
In accordance with our policy of continuous development
Silvan Australia Pty. Ltd. reserves the right to make changes
at any time without notice.
Record the details of your post hole digger here for future reference when discussing
service with your Silvan dealer, ordering parts or making a warranty claim.
About Your Warranty
Warranty Policy
Safety information
Attaching to the Tractor – Initial Assembly
Standard Models
Hydraulic Down Pressure Models
Connecting Hydraulic Hoses
Attaching Gearbox and Auger – All Models
Connecting PTO Shaft – All Models
Detaching Digger from the Tractor
Attaching Assembled Digger to the Tractor
Changing the Auger
Changing Auger Teeth and Pilot
Adjusting Slip Clutch
Safety Covers
Safe Auger Operation
Important Safe Work Practices
General Operation
Lubrication and Maintenance
Silvan Australia Pty. Ltd. is an Australian owned company specialising in the supply of equipment to
primary producers. A leader in the design of agricultural sprayers and associated equipment, the
company was established in 1962 and has grown to become the largest manufacturer and supplier of
crop protection equipment in Australia.
At Silvan we are extremely proud of our reputation for quality products backed by quality service. Your
investment in a Silvan product is an investment in quality.
This manual covers all models of Silvan three point linkage, tractor mounted, PTO driven post hole
diggers including the 40 HP, 50 HP and 75 HP models and the 50 HP and 75 HP Hydraulic down
pressure models.
Silvan post hole diggers are designed and manufactured to provide a high standard of performance and
safety. To ensure continued safe and efficient operation of your post hole digger, you need to read this
manual thoroughly and fully familiarise yourself with all aspects of the machine’s operation,
maintenance and safety procedures. Because of the unguarded auger, all post hole diggers are
inherently dangerous machines. For this reason pay particular attention to the safety
instructions contained within this manual.
Now that you are a proud Silvan owner, all our services and dealer support is available to you should
you need them. We assure you of our best attention at all times.
Interchangeable augers with welded steel flights
and forged steel boring head.
Replaceable forged steel teeth and pilot bit.
Flat or chisel teeth, plain or tungsten tipped.
Plain or tungsten tipped pilot bit.
Digging depth 1 metre.
Weight (kg)
4 inch
6 inch
8 inch
9 inch
10 inch
12 inch
15 inch
18 inch
20 inch
24 inch
Welded RHS steel construction.
Removable lower linkage pins
Category 1
All Models
All models have Category 2 bushes supplied also
Fully shielded telescopic PTO shaft.
Overload protection
Adjustable twin disc spring loaded friction clutch
6 in. dia. on 40 and 50 HP, 8 in. dia. on 75 HP
Flexible safety shields over clutch and auger to
gearbox connection.
Cast iron gearbox with heat treated bevel gears
and shafts.
Gearbox lubrication SAE 85-140 gear oil.
Weight without auger attached
40 HP
102 kg
50 HP
107 kg
75 HP
126 kg
50 HP Hydraulic
157 kg
75 HP Hydraulic
167 kg
Hydraulics (Hydraulic Down Pressure Models)
Double acting cylinder 3” dia. x 12” stroke
Two hydraulic hoses with quick release fittings.
About Your Warranty
Silvan Australia Pty. Ltd. builds equipment to a high level of specification
using components from quality suppliers. The following information is
provided to assist you with any repairs required within the warranty period.
• All warranty repairs on Silvan products are carried out by Silvan
dealers. If any warranty repairs are required on Silvan products, it is
recommended that the product be returned to the place of purchase.
• It is good practice to keep a record of equipment maintenance both
during and after the warranty period.
The following information on warranty coverage explains the extent and
limitations of your Warranty coverage on Silvan Products.
New Product Warranty
This warranty is the only warranty applicable to Silvan new products ('Products') and, to the
maximum extent permitted by law, is expressly in lieu of any other conditions or warranties
expressed or implied in relation to the Products.
Subject only to legislative obligations to the contrary, Silvan shall not be liable for incidental
or consequential damage resulting from ownership or use of a Product.
Silvan does not authorize any person to create for it any other obligation or liability in
connection with these products.
Silvan warrants its authorised Dealer, who in turn warrants the original purchaser (owner) of each
new Silvan product that it will repair or replace the product, or, pay the cost of repair or replacement,
as determined by Silvan without charge for labour or any defective or malfunctioning parts in
accordance with the warranty limitations and adjustment schedule below.
The warranty period begins on the date the product is delivered to the first retail purchaser for a
period of 12 months
This Warranty Covers
Only conditions resulting directly from defects in workmanship or material under normal use and
Warranty Exclusions
The Warranty does not cover:
Conditions resulting from misuse, use of incompatible chemicals, exceeding
machine specifications including overloading, impact damage, negligence,
accidental damage or failure to perform recommended maintenance services.
Any product which has been repaired by other than an authorised Silvan service
outlet in a way which, in the sole and absolute judgement of Silvan, adversely affect
its performance or reliability.
The replacement of maintenance items such as diaphragms, batteries, V belts and
ground engaging components, etc.
Loss of time, inconvenience, loss of use of the product liability to third parties or any
other consequential damages.
Incidental costs associated with a warranty repair including any travel costs, out of
hour’s labour charges, cleaning costs, transportation costs, freight costs or any
communication costs.
The repair of a defective product qualifying under this warranty will be performed by any authorised
Silvan service outlet within a reasonable time following the delivery of the product, at the cost of the
owner, to the service outlet’s place of business. The product will be repaired or replaced, using new
parts supplied by Silvan. Silvan, in its absolute discretion, may choose to pay the cost of
replacement or repair of the product.
The owner is responsible for the performance of regular maintenance services as specified in the
Owner/Operator Manual applicable to the product. Failure to carry out regular maintenance may
invalidate warranty
Safety Information
Before operating the post hole digger read the following safety instructions.
Failure to comply with these warnings may result in serious injury or death.
Whilst your Silvan post hole digger has been designed and manufactured to incorporate all necessary
safety features it is absolutely essential that any person who operates or works on the machine is
aware of the safety precautions that should be exercised.
S Ensure that there are no underground electrical
S Silvan post hole diggers are designed and
cables, telephone cables, gas, water, sewerage
manufactured solely for the purpose of boring
or drainage pipes in the area to be drilled. If in
holes in earth and clay materials. Under no
doubt about any of the above do not start
circumstances should they be used for any
digging until the circumstances have been fully
other purpose.
investigated and it is safe to begin.
S Before using the post hole digger carefully read
S Exercise extreme care when operating in wet or
and ensure you understand the contents of this
slippery conditions or on sloping or uneven
manual and the contents of the operators
terrain. Allow for the effect that the weight of the
manual for the associated tractor, including all
post hole digger has on the tractor’s stability.
relevant safety instructions.
Refer also to the tractor manufacturer’s
S Before operating the post hole digger read all
operating and safety instructions.
the safety warnings that are carried on the
S Do not operate the post hole digger with people
machine. Refer to the next page for the location
or animals in the vicinity where they could be
and the wording of these warnings.
caught in the mechanism or injured by the
S Ensure that all operators are fully trained and
machine. Keep onlookers at least 6 metres from
understand how to safely operate the post hole
the digger whilst in operation.
S Always operate the post hole digger from the
S Do not operate the post hole digger whilst
tractor seat.
wearing loose clothing, unrestrained long hair,
S Never clear earth away from the auger whilst it
jewellery or anything which could become
is operating or allow any helper to do so.
entangled in rotating parts or limit your vision.
S Never allow a person to pull down on the digger
S Only operate the post hole digger on a tractor
boom or attach any type of counterweight to the
fitted with a roll-over protective structure
boom to increase penetration
(ROPS), or a cab incorporating a ROPS,
complying with AS1636 or equivalent.
S Before dismounting from the tractor or allowing
any person to approach the post hole digger,
S Wear ear protection when operating the post
disengage the PTO, switch off the tractor
hole digger on a tractor that is not fitted with a
engine and apply the parking brake.
sound proofed cabin.
S Ensure the tractor engine is switched off and
S Ensure that the tractor engine power and
the parking brake is applied before performing
linkage capacity match the requirements of the
any inspection or maintenance on the digger. If
post hole digger. Refer to the tractor operator’s
it is necessary to raise the machine for such
manual for safe working loads, including any
work ensure it is properly supported. Do not rely
counter-weighting that may be required to
on the tractor hydraulics for support.
balance the weight of the post hole digger.
S Never allow any person to ride on the post hole
S Do not operate the post hole digger without all
digger or the tractor when the digger is
its safety shields and the tractor safety shields
in place.
S Relieve
S Before operating the post hole digger inspect
disconnecting hoses on hydraulic diggers. Oil
the area to be worked to ensure that you are
escaping under pressure can penetrate the
familiar with the ground conditions and that the
skin, causing serious injury. Seek medical
area is clear of tools and equipment such as
advice immediately if injured by escaping oil.
fencing wire.
S Ensure that you wear appropriate clothing,
including steel cap boots.
Safety information
Locations of Safety Warnings
The location and wording of the safety decals fitted to all Silvan post hole diggers is shown below.
It is important that all operators read and follow the information given on the decals. They should be kept
clean and legible at all times. If any are missing or unreadable they should be replaced by ordering new
from your Silvan dealer.
DEC 122
Both sides
DEC 124
Both sides
DEC 123
Both sides
Both sides
DEC 122
DEC 48
DEC 122
DEC 122
399 14 100
Both sides
DEC 123
DEC 124
Both sides DEC 122
DEC 123
Both sides
Both sides
DEC 122
DEC 124
399 14 100
399 14 100
While supporting the boom, swing the digger frame
up so that the connecting bolt can be installed in
the boom bracket. Tighten the locknut on the
connecting bolt so the fit is snug but free to pivot.
Three holes are provided in the bracket to facilitate
fitment to different tractors. Use the hole that
positions the linkage frame nearest to vertical.
Pivot Pin
If necessary adjust the sway chains on the tractor
linkage to centralise the digger and prevent any
sideways movement.
Refer to the next page for information on fitting the
gearbox pivot pin and PTO shaft.
2. Hydraulic Down Pressure Model
At the time of delivery the linkage frame with boom
attached, PTO shaft, hydraulic cylinder with hoses
connected, and gearbox with auger attached are
supplied as separate items. The following
instructions apply for the first installation.
Fit Boom to
upper linkage
Linkage clevis of tractor
The Hydraulic digger is fitted with bolt-on Category
2 linkage pins. If it is necessary to fit it to a
Category 1 tractor, change the pins to Category 1
and use a spacer in the pin hole of the upper link
bar to reduce its diameter. Category 1 pins and
spacers are available from Silvan dealers. The
upper linkage pin and three lynch pins from the
tractor are required to complete the installation.
Attaching to the Tractor - Initial Assembly
1. Standard Models
At the time of delivery the linkage frame, boom,
PTO shaft, and the gearbox with auger attached
are supplied as separate items. The following
instructions apply for the first installation.
The lower linkage pins can be installed at three
alternative heights and the upper link bar can be
set to four lengths. These adjustments are used to
position the rear member of the linkage frame as
near to vertical as possible. As supplied, the
linkage pins are in the middle location and the
upper link bar in the shortest position.
Gearbox and
Auger Assembly
Place the linkage frame and boom assembly
behind the tractor. Disable the tractor draft control
and lower the linkage arms so they can be fitted
over the digger linkage pins. If necessary
reposition the pins to a more convenient height. Fit
a lynch pin in each linkage pin to secure the arms.
Before performing any installation
ensure that the tractor engine is
turned off and the parking brake is
firmly applied.
All models are fitted with Category 1 lower linkage
pins. Two Category 2 bushes are also provided. If
it is necessary to fit the linkage frame to a
Category 2 tractor, slide the bushes over the
Category 1 pins. This will increase the pin diameter
to suit. The upper linkage pin and three lynch pins
from the tractor are required to complete the
Remove the locking bolt from the upper link bar
and swing the linkage frame up so the rear
member is vertical. Adjust the length of the link bar
(to the nearest hole) so it can be fitted into the
tractor upper linkage clevis. Refit the locking bolt
and nut to the link bar. Install the upper linkage pin
and secure with a lynch pin. It may be necessary to
adjust the height of the tractor arms so the holes
align to enable installation of the upper pin.
Position the linkage frame of the digger behind the
tractor. Disable the tractor draft control
mechanism, fully lower the tractor linkage arms
and connect the digger linkage pins. Install a lynch
pin in each linkage pin to secure the arms.
Once the Hydraulic digger is fitted to the tractor the
linkage cannot be raised or lowered and the digger
height is then controlled by the hydraulic cylinder.
If necessary adjust the sway chains on the tractor
linkage to centralise the sub-frame and prevent
any sideways movement.
Fit the inner end of the boom into the upper linkage
clevis of the tractor, install the tractor linkage pin
and secure it with a lynch pin.
Gearbox Oil Level
The post hole digger is shipped from the factory
without oil in the gearbox and it is the dealer’s
responsibility to add it before delivering the
machine. However, before starting the digger for
the first time the oil level should be checked and if
necessary fill to the level plug with a good quality
SAE 85-140 gear oil.
Pivot Pin
Check the oil level each day before starting the
digger and top up if necessary. It is not necessary
to change the gearbox oil periodically.
Attaching the Gearbox and Auger – All Models
Lower the digger boom fully. Position the gearbox
and auger assembly behind the boom and align
the pivot pin holes. Install the pivot pin and secure
with the split pin provided. Make sure that the input
shaft of the gearbox is facing towards the tractor,
so that the PTO shaft can be fitted.
Raise the boom to full height to allow the auger to
hang vertically then lower it so the end of the auger
rests on the ground.
Linkage Frame
rear member
Connecting the PTO Shaft – All Models
Clean and grease the splines on the tractor and
digger PTO stub shafts, fit the friction clutch to the
gearbox then install the PTO shaft making sure
that the spring loaded locking pins engage in the
grooves of both stub shafts. If A PTO cover chain
is fitted, ensure the loose end is clipped to the
eyelet attachment welded to the boom ensuring
not to leave any chain slackness.
Adjust length of
Upper Link Bar
so rear member of
Linkage Frame
is vertical
Ensure that the PTO stub shaft master guard is
fitted to the tractor.
Install the hydraulic cylinder between the lugs on
the linkage frame and boom using the pins
supplied. Connect the hoses to the tractor, see
below for further details.
Check that the PTO shaft is of the correct length,
as follows. On Standard digger models set the
linkage so the ends of the two stub shafts are
closest. Install the PTO shaft then depress the
locking pin at the gearbox end and pull the shaft
back to check there is at least 25mm of telescopic
travel remaining. Refit the PTO shaft and raise and
lower the digger to check that the telescopic tubes
overlap by approximately 1/3rd their length, and
not less than 150mm, in all positions. On the
Hydraulic Down Pressure model check these
dimensions in the fixed operating position. Refer
diagram on next page.
Connecting the Hoses – Hydraulic Model
Relieve all hydraulic pressure
before connecting or disconnecting
hoses. Oil escaping under pressure
can penetrate skin, causing serious
injury. Seek immediate medical
treatment if injured by escaping oil.
Before attaching or removing the hydraulic hoses
ensure that the quick release connections are
clean to avoid contaminating the system.
If the PTO shaft has to be shortened cut equal
amounts from both male and female shafts and
safety covers. Carefully remove all burrs and swarf
then clean and relubricate before reassembling.
Plug the digger hoses into the tractor remote
outlets. For safety reasons it is desirable to always
fit the hoses in the same pattern to ensure that the
direction of the control to apply downward pressure
will always be the same. This can be achieved by
marking the hoses with tags. Ensure the hoses are
well supported and clear of the tractor wheels.
To remove the auger, raise the boom to allow the
auger to hang vertically then lower until the end of
the auger is about 100mm above the ground. Stop
the tractor engine and apply the parking brake.
Remove the two attaching bolts from the upper end
of the auger and pull down so that it slides off the
gearbox shaft. If the auger is tight on the shaft
loosen it by sharply striking the auger tube with a
hammer where it overlaps the gearbox shaft. If it is
necessary to strike the auger longitudinally on the
flighting to drive it off the shaft place a piece of
timber on the flighting to avoid damage.
Clean and lightly grease the gearbox output shaft
and the inner tube of the new auger. Align the bolt
holes and slide the auger onto the gearbox shaft.
Install and securely tighten the two attaching bolts.
Detaching the Digger from the Tractor
Changing Auger Teeth and Pilot
When worn the teeth and/or pilot bit on the auger
head should be replaced to maintain good digging
Stop the tractor engine and apply
the park brake before physically
handling any part of the post hole
digger and auger.
Two types of teeth are available and both can be
supplied as plain forgings or with tungsten carbide
tips for longer life. Flat teeth are used for normal
ground conditions. Chisel teeth can be fitted for
drilling in rocky ground. Tungsten tipped teeth
provide long life in abrasive conditions but can
become chipped if used in very rocky conditions.
Plain or tungsten carbide tipped pilot bits are also
available. The same teeth and pilots fit all augers.
Raise the boom to allow the auger to hang
vertically then lower it until the end rests on the
Remove the PTO shaft, and on hydraulic diggers
disconnect the hydraulic hoses. Move the tractor
slowly forward whilst lowering the boom until the
digger gearbox rests on the ground. Stop the
tractor and fully lower the linkage. Disconnect the
upper linkage pin then the lower pins. It may be
necessary to use a hoist to take the weight of the
When fitting chisel teeth to double toothed augers
it is normal to only fit chisels to the inner position
and retain the flat teeth in the outer position.
Chisels are rarely required in both positions.
Alternatively the digger can be removed with the
PTO still attached to the gearbox by drilling the
auger into the ground.
The teeth are located in the socket of the auger
head by their U-shaped profile and are held in
place by a rubber retainer which is wedged
between the tooth and the socket. To remove the
tooth, place a small punch on the rear corner and
strike it sharply with a hammer to drive it out of the
socket, refer diagram below.
Attaching Assembled Digger to the Tractor
Position the digger with the PTO shaft removed
and gearbox and auger on the ground behind the
boom. Back the tractor into position, disable the
draft control and lower the linkage. Connect the
tractor arms to the digger pins, swing the digger
frame up and fit the boom to the tractor upper hitch
clevis, or connect the hitch post on a hydraulic
digger. Install the PTO shaft. Connect the hydraulic
hoses, if applicable.
Always fit new teeth in pairs and use new retaining
rubbers. Teeth and rubbers are sold in sets. Push
the rubber through the hole in the socket and
position it centrally. Align the U-shape of the tooth
with the socket and hammer it into position with a
soft-headed hammer, or place a piece of timber
between the hammer and tooth.
Changing the Auger
Interchangeable augers of various diameters are
available for all Silvan post hole diggers. Augers
for all models have double cutting teeth and range
from 6 to 24 inches in diameter. Refer to the
Specifications section for the list of auger
diameters available. All augers are of the same
length and are attached in the same way by two
bolts through the gearbox output shaft.
The pilot bit is located on the stub of the auger
head and is driven by an interlocking tongue and
slot. A single bolt and locknut secure it.
Remove tooth with
hammer and punch
Flexible Safety Guard
Pilot Bit
Bolt and
Adjusting Nut
Clutch Spring
Flat Tooth
If the post hole digger has not been used for some
time and the clutch cannot be made to slip, it may
be seized due to sticking plates. In this case, fully
slacken each of the clutch bolts and run the digger
for about 30 seconds with the auger in the ground
to free the clutch plates and clean the surfaces.
Then re-tighten the spring bolts evenly to achieve
the required slip setting. This can be done by
compressing the springs fully and then backing off
two turns.
Install new
Retaining Rubber
Insert Tooth
and drive home with
soft-headed hammer
Chisel Tooth
Safety Guards
All post hole diggers have factory fitted safety
guards over the input and output shafts of the
gearbox and a telescopic cover fully enclosing the
PTO drive shaft.
Double tooth auger shown
Adjusting the Slip Clutch
All post hole diggers are fitted with an adjustable
friction clutch, which slips under heavy load to
prevent damage to the auger or driveline, such as
when encountering rocks or heavy tree roots.
Never operate the machine without these covers
being correctly fitted and in good condition. Worn
or damaged covers do not provide adequate
protection and must be replaced before operating
the machine.
The slip clutch is factory set and should not need
adjustment under normal use. If it is necessary to
adjust the clutch, remove the PTO shaft and turn
each of the nuts on the clutch spring bolts by one
half turn. Turning the nuts clockwise increases
spring loading and reduces clutch slip. Turning the
nuts anti-clockwise loosens the clutch.
It is important that you keep spare covers on
hand as immediate replacements so as not to
compromise the ongoing safety of operators.
Replacement covers may be obtained through your
Silvan dealer.
The open ends of drive line covers
may still allow entry of objects.
Hair and clothing is especially
vulnerable to be drawn in by
factors such as static electricity or
windy conditions
It is extremely important that close physical
contact with the machine whilst in operation is
avoided at all times without fail.
After adjusting the clutch, operate the digger and
check whether slipping continues. It is important
that adjustment is made evenly and in small
increments. Over-tightening may result in damage
to the PTO shaft, gearbox or auger, so care needs
to be taken. Under no circumstances should the
post hole digger be operated with the clutch
tightened to an extent where it is locked.
Auger Operation – Safe Work Practice
A properly selected post hole digger should
achieve satisfactory penetration if maintained
Stand a minimum 6 metres away
from the post hole digger when in
operation at all times.
Failure to do so may cause serious
injury or death.
Penetration difficulty is usually due to the cutting
blades requiring replacement or the machine not
being suitable for the conditions.
Two people should be on the worksite while
operating the post hole digger.
No person, worker or bystander, should be
allowed to approach the machine while it is in
operation. Stand a minimum 6 metres clear of
operating area.
The practice of standing or sitting on the
frame of the post hole digger to increase
penetration must not be allowed.
The operator, or assistant, should not shovel,
or otherwise remove, soil from the auger area
while it is in operation.
On hitting a hard object such as a rock or tree
root, the auger may jump out of the hole and
swing outwards.
Remove all fence wire, wire netting, etc. a
minimum of 5 metres from the vicinity of the
post hole.
Nicks, rust or mud on the auger flighting or
shaft can catch and pull hair or clothing in and
physically draw the operator in.
The correct cutter points to suit digging
conditions must be used and maintained in
good condition.
The manufacturer’s safety guards must be
fitted to the machine and maintained in good
The post hole digger must be serviced and
repaired to maintain optimum operating ability.
Operation of a correctly selected and maintained
post hole digger should not require additional
weight to be added to the machine.
Entrapment or being struck by the
auger could cause serious injury or
death. Entrapment in any part of
the PTO driveline could also cause
serious injury or death. All specified
safety procedures must be adhered
to at all times without fail.
Augers are inherently dangerous. Be aware of
the following:
Do not shovel soil from the auger whilst in
operation (see above).
Keep all tools and equipment such as fencing
wire and posts a minimum of 5 metres away
from the hole being dug.
Never allow anyone to sit, stand,
or hang on the post hole digger
frame to increase penetration.
Failure to do so may easily result
in serious injury or death.
Important Safe Working Practices
To ensure the safe operation of a post hole digger
the following procedures must be adhered to:
Train all operators prior to use of the machine.
Never allow a minor to operate or be in the
vicinity of a post hole digger in operation.
Ensure that the operator has read the
operating manual.
Limit work hours to minimise fatigue.
Operators must have long hair secured by a
cap or other means.
Operators must not wear loose clothing, or
clothing having a drawstring.
Always operate the digger from the tractor
General Operation
Before operating the digger for the first time carry
out the lubrication checks shown in the Lubrication
and Maintenance section. Read all the safety
information contained in this manual and on the
decals attached to the machine. Carefully inspect
the area to be dug.
Transporting the Post Hole Digger
Before travelling with the digger attached to the
tractor, swing the auger up and forward and secure
it with the chain provided. On Standard models
fully raise the tractor linkage arms.
Loop the supplied chain around the lower end of
the auger and connect the loose end to the body of
the chain with the bolt and locknut provided. Attach
the upper end of the chain to the digger boom in
the same way. Ensure that the chain is securely
attached at both ends.
Do not start the tractor with the PTO in gear.
Position the tractor with the auger hanging vertical
and touching the ground at the spot where the hole
is to be dug. Use the tractor linkage to raise or
lower the digger boom on Standard models. On
the Hydraulic model use the hydraulic cylinder to
raise or lower the boom.
Travel slowly at a speed that is safe for the
particular ground or road conditions. If travelling on
a public road ensure that the tractor is equipped
with all the necessary lights and signs to comply
with local regulations.
Disengage the tractor draft control and set the
tractor engine speed to a fast idle so that the auger
will revolve in the range of 50 to 100rpm. The most
appropriate auger speed will depend upon the
available tractor power, the diameter of the auger
and the ground conditions. The larger the diameter
of the auger the slower the speed should be.
Engage the PTO drive and allow the action of the
auger to penetrate the surface.
On Standard models, slowly lower the tractor
linkage to follow the penetration of the auger.
On the Hydraulic model apply down-pressure with
the hydraulic cylinder to increase penetration but
limit the pressure to ensure that the tractor wheels
are not lifted off the ground.
At every 300 to 500mm of depth lift the boom to
spin the earth off the auger flighting, then continue
drilling. When raising or lowering the auger, move
the tractor forward or backward to keep the auger
vertical and compensate for the arc of the boom.
If the safety clutch slips reduce the down pressure
and if necessary inspect the hole for obstructions.
Before inspecting the hole or when the required
depth has been reached raise the auger from the
hole and disengage the PTO drive. Move the
tractor away from the hole and lower the auger so
that the end rests on the ground. Stop the tractor
engine, apply the parking brake and dismount to
inspect the hole.
Lubrication and Maintenance
General Inspection
After the first hour of operation and then before
starting each day, check that all hardware is tight,
in particular the auger attaching bolts and auger
pilot attaching bolt.
Grease Gearbox Pivot
Shaft every 20 hrs
Hydraulic Model only
Inspect for any damaged components and replace
before starting operation.
PTO Shaft
Grease the PTO shaft with multi-purpose grease at
the locations shown before starting the post hole
digger for the first time and then at the intervals
shown. This is the amount of lubrication
recommended for normal operation. More frequent
inspection and lubrication may be needed under
very dusty conditions.
Pivot Shafts – Hydraulic Model Only
On Hydraulic models grease the nipple on the
gearbox pivot shaft and the 4 nipples on the boom
pivot shafts approximately every 20 hours
Grease (2) Frame Pivots
both sides every 20 hrs
Hydraulic Model only
PTO Shaft
See opposite
paragraph for
Hydraulic model shown
Standard model has no pivot shaft grease fittings
ABN 48 099 851 144
89 Lewis Rd.
Wantirna South
Victoria 3152
Telephone: +61 (03) 9887 2788
Facsimile: +61 (03) 9887 1035
22 Sunshine Ave.
Te Rapa
Hamilton 2001
Telephone: +64 (07) 849 6030
Facsimile: +64 (07) 849 6070
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