Toro Backhoe, Dingo Compact Utility Loader User manual

Toro Backhoe, Dingo Compact Utility Loader User manual
Form No. 3321-518
Backhoe
Sitework Systems Attachment
Model No. 22412—990001 & Up
Operator’s Manual
English (CE)
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Decals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stability Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loose Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .
Greasing the Backhoe . . . . . . . . . . . . . . . . . . . . . .
Installing the Backhoe on the Traction Unit . . . . .
Installing a Bucket . . . . . . . . . . . . . . . . . . . . . . . . .
Adjusting the Seat . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Backhoe from the Traction Unit . . .
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Checklist . . . . . . . . . . . . . . . . . . . . . . . .
Backhoe Overview . . . . . . . . . . . . . . . . . . . . . . . . .
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the Backhoe . . . . . . . . . . . . . . . . . . . . . .
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Interval Chart . . . . . . . . . . . . . . . . . . . . . .
Greasing and Lubrication . . . . . . . . . . . . . . . . . . . .
Changing the Bucket Orientation . . . . . . . . . . . . . .
Changing the Boom Speed . . . . . . . . . . . . . . . . . . .
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For your convenience, write the product model and serial
numbers in the space below.
Page
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Model No:
Serial No.
The warning system in this manual identifies potential
hazards and has special safety messages that help you and
others avoid personal injury, even death. DANGER,
WARNING and CAUTION are signal words used to
identify the level of hazard. However, regardless of the
hazard, be extremely careful.
DANGER signals an extreme hazard that will cause
serious injury or death if the recommended precautions
are not followed.
WARNING signals a hazard that may cause serious injury
or death if the recommended precautions are not followed.
CAUTION signals a hazard that may cause minor or
moderate injury if the recommended precautions are not
followed.
Two other words are also used to highlight information.
“Important” calls attention to special mechanical
information and “Note” emphasizes general information
worthy of special attention.
The left and right side of the machine is determined by
standing in the normal operator’s position.
Introduction
Safety
We want you to be completely satisfied with your new
product, so feel free to contact your local Authorized
Service Dealer for help with service, genuine replacement
parts, or other information you may require.
Improper use or maintenance by the operator or owner
can result in injury. To reduce the potential for injury,
comply with the safety instructions in the traction unit
operator’s manual and always pay attention to the
safety alert
symbol, which means CAUTION,
WARNING, or DANGER—“personal safety
instruction.” Failure to comply with the instruction
may result in personal injury or death.
Whenever you contact your Authorized Service Dealer or
the factory, always know the model and serial numbers of
your product. These numbers will help the Service Dealer
or Service Representative provide exact information about
your specific product. You will find the model and serial
number on a plate located on the product.
The Toro Company – 1999
8111 Lyndale Ave. South
Bloomington, MN 55420–1196
All Rights Reserved
2
Printed in the USA
DANGER
WARNING
POTENTIAL HAZARD
• There may be buried power, gas, and/or
telephone lines in the work area.
POTENTIAL HAZARD
• When going up or down hill, the machine could
overturn if the heavy end is toward the
downhill side.
WHAT CAN HAPPEN
• Electric shock, death, or explosion may occur.
WHAT CAN HAPPEN
• Someone may be pinned or seriously injured by
the machine if it overturns.
HOW TO AVOID THE HAZARD
• Have the property or work area marked for
buried lines and do not dig in marked areas.
HOW TO AVOID THE HAZARD
• Operate up and down slopes with the backhoe
uphill.
DANGER
CAUTION
POTENTIAL HAZARD
• There may be overhead power lines in the work
area.
POTENTIAL HAZARD
• The tires of the traction unit can be slippery.
WHAT CAN HAPPEN
• Electric shock or death may occur if a power
line is touched by the backhoe.
WHAT CAN HAPPEN
• If the tires are used as a step to climb on to or
off of the backhoe, the operator could slip and
fall, causing injury.
HOW TO AVOID THE HAZARD
• Survey and mark the area where there are
overhead power lines, and dig with caution
under power lines, to ensure that you do not
touch them with the backhoe.
HOW TO AVOID THE HAZARD
• Use the step provided when climbing on to or
off of the backhoe and not the traction unit
tires.
Safety Decals
2
3
5
4
6
8
7
16
1
9
# 100–4132
1
11
10
# 100–4136
15
12
13
# 100–4133
14
Figure 1
1. Crushing hazard—whole
body
2. Keep bystanders away
3. Safety alert symbol
4. Read the operator’s manual
5. Explosive hazard
6. Electric shock hazard
7. Do not dig in areas with
underground utilities
8. Do not allow the backhoe to
contact overhead power lines
9. Crushing hazard—foot
10. Crushing hazard—hand
11. Keep hands and feet away
from moving stabilizers
12. Secure the boom before
leaving the machine
13. Tipping hazard
3
14. Do not move the traction unit
while seated on the backhoe
15. Lower the stabilizers before
beginning work
16. Use the counterweight
4
1
3
2
# 100–4134
# 100–4135
# 100–4137
Figure 2
1. Secure the boom before
transporting the backhoe
2. Install and secure the side
bars before operating the
backhoe
3. Tipping hazard
4. Do not move the traction unit
while seated on the backhoe
Specifications
Note: Specifications and design are subject to change without notice.
Width
34.5 inches (87.6 cm)
Length
112.5 inches (286 cm)
Transport height
84 inches (213 cm)
Fully raised height
115 inches (292 cm)
Weight
710 lbs (322 Kg)
Digging depth (maximum)
79 inches (200.6 cm)
Bucket rotation
135 degrees
Swing arc
151 degrees
Stabilizer spread (working)
130 inches (330 cm)
Stability Ratings
Orientation
To determine the degree of slope you can traverse with the
backhoe installed on a traction unit, find the stability
rating for the hill position you want to travel in the
following table, then find the degree of slope for the same
rating and hill position in the Stability Data section of the
traction unit operator’s manual.
Front Uphill
Rear Uphill
WARNING
POTENTIAL HAZARD
• Exceeding the maximum recommended slope
can cause the traction unit to tip.
Side Uphill
WHAT CAN HAPPEN
• If the traction unit tips, you or bystanders could
be crushed.
HOW TO AVOID THE HAZARD
• Do not drive the traction unit on a slope steeper
than the maximum recommended slope, as
determined in the following table and the
traction unit operator’s manual.
Stability Rating
C
D
C
IMPORTANT: If your traction unit has a rear
operator’s platform, the counterweight must be used
on the platform while using the backhoe, or the
traction unit will become unstable.
4
Installation
Loose Parts
Note: Use the chart below to identify parts for assembly.
DESCRIPTION
QTY.
Side bar bracket
2
Back-plate
2
Bolt
6
Nut
6
Side bar
2
Long tilt cylinder pin
1
Cotter pin
2
Linch pin
2
Link
2
Bucket, 9, 12, or 16 inch (23, 30, or 41 cm)
1
USE
Install the side bar brackets and attach to the
backhoe.
Replace the tilt cylinder pin and connect to the
backhoe.
Install on the backhoe. Must be purchased
separately.
Initial Assembly
1
Installing the Side Bar Bracket
1. Remove the traction unit manual holder and relocate it
under the control panel (models 22305 and 22305TE
only).
3.5 in. (8.9 cm)
2. Remove the battery from the traction unit. Refer to
your traction unit operator’s manual.
m–4560
Note: If you have a four-wheel drive, diesel traction unit,
you do not need to remove the battery; however, you do
need to remove the loader arm cylinder and exhaust cover
plate on the right side of the machine. To remove the
loader arm cylinder, you need to raise the loader arms and
install the cylinder lock on the left side before removing
the right cylinder. Replace the cylinder and plate when
finished installing the side bar bracket.
3.2 in. (8.1 cm)
Figure 3
1. Side bar bracket
2. 3.2 in. (8.1 cm)
4. Drill three, 0.568 in. (1.43 cm) diameter holes through
the side of the traction unit at the marked locations.
5. Secure the side bar bracket to the side of the traction
unit using the back-plate, three carriage bolts, and
three nuts.
3. Line up the side bar bracket as illustrated in Figure 3
and mark the centers of the three holes.
5
Greasing the Backhoe
3
Before using the backhoe for the first time, grease all of
the fittings; refer to Greasing and Lubrication, page 13.
2
Installing the Backhoe on the
Traction Unit
4
1
IMPORTANT: Before connecting any attachments to
the traction unit, ensure that the mount plates are free
of any dirt or debris.
m–4586
Figure 4
1. Side bar bracket
2. Back-plate
1. Start the engine.
3. Carriage bolt
4. Nut
2. Tilt the attachment mount plate forward.
3. Drive forward, positioning the mount plate into the
upper lip of the receiver plate (Fig. 7).
6. Torque the nuts to 75 ft-lbs (102 N·m).
IMPORTANT: You must center the mount plate in the
receiver plate so that the gaps on the sides are equal. If
you do not center the plates, you may not be able to
install the side bars.
7. Repeat steps 3–6 for the other side of the traction unit.
Changing the Tilt Cylinder Pin
1. Remove the bolt securing the upper tilt cylinder pin
(Fig. 5).
1
2. Using a hammer and punch, remove the tilt cylinder
pin.
2
2
3
1
m–4055
m–4562
Figure 7
Figure 5
1. Tilt cylinder
2. Tilt cylinder pin
1. Mount plate
2. Receiver plate
3. Bolt
4. Tilt the mount plate back until the receiver plate
contacts the mount plate
3. Apply a generous coating of grease to the new pin.
5. Engage the attachment lock pins (Fig. 8).
4. Install the new pin into position and secure it with two
cotter pins (Fig. 6).
1
Note: Leave the new pin installed, even when the backhoe
is removed.
1
2
m–4056
m–4563
Figure 8
Figure 6
1. New tilt cylinder pin
1. Attachment lock pins (shown in engaged position)
2. Cotter pin
6. Tilt the backhoe part of the way back.
6
7. Stop the engine.
Note: You may need to move the attachment tilt lever to
line up the holes in the links with the pins.
8. Move the auxiliary hydraulic lever forward, backward,
and back to the neutral position to relieve hydraulic
pressure at the hydraulic couplers.
4
4
IMPORTANT: Ensure that all foreign matter is
cleaned from hydraulic connections before making
connections.
1
2
9. Remove protective covers from hydraulic couplers on
the traction unit. Connect covers together to prevent
contamination during operation.
3
m–4130
Figure 9
10. Slide the collars back on the hydraulic couplers and
connect the attachment couplers to the machine
couplers.
1. Tilt cylinder pin
2. Backhoe link pin
3. Link
4. Linch pin
15. Install the side bars on each side as illustrated in
Figure 10.
WARNING
POTENTIAL HAZARD
• Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
16. If the bars do not fit snuggly, remove them, loosen the
jam nut, and thread the compound side bar together or
apart as needed to ensure that they fit as tight as
possible (Fig. 10). Tighten the jam nut when finished.
WHAT CAN HAPPEN
• Fluid accidentally injected into the skin must be
surgically removed within a few hours by a
doctor familiar with this form of injury or
gangrene may result.
Note: If you have a four-wheel drive, diesel traction unit,
you may need to loosen the hood and slide it up in the
mounting slots to ensure that the hood does not interfere
with the side bars.
HOW TO AVOID THE HAZARD
• Keep body and hands away from pin hole leaks
or nozzles that eject high pressure hydraulic
fluid.
• Use cardboard or paper to find hydraulic leaks,
never use your hands.
2
4
11. Confirm that the connection is secure by pulling on the
hoses.
3
12. Start the engine.
1
m–4561
13. Tilt the backhoe all the way back.
Figure 10
1. Side bar
2. Pin
CAUTION
POTENTIAL HAZARD
• Tilting the backhoe can can pinch hands.
3. Hairpin cotter
4. Jam nut
Installing a Bucket
WHAT CAN HAPPEN
• You could pinch and/or crush your hand when
adjusting the seat.
The backhoe does not come with a bucket installed
because several sizes of buckets are available for you to
choose from. Install your bucket as follows:
HOW TO AVOID THE HAZARD
• Keep away from the moving backhoe when
tilting.
1. Install the backhoe onto the traction unit and raise the
dipperstick above the ground.
2. Remove the bolts and nuts securing each of the two
bucket pins to the dipperstick (Fig. 11).
14. Slide the two links on each end of the tilt cylinder pin
and the backhoe link pin and secure them with two
linch pins (Fig. 9).
3. Remove the pins.
7
4. Align the pin holes in the bucket with the mounting
holes in the dipperstick (Fig. 11).
5. Secure the bucket with the pins, bolts, and nuts
removed previously (Fig. 11).
1
4
4
2
1
2
3
3
m–4589
Figure 12
Figure 11
1. Dipperstick
2. Bucket pin
m–4547
1. Seat
2. Knobs
3. Bolt
4. Nut
3. Pin and hairpin cotter
5. When you have the proper height, install the pin and
hairpin cotter to secure the seat.
Adjusting the Seat
Removing the Backhoe from
the Traction Unit
CAUTION
POTENTIAL HAZARD
• The seat mounting bracket has several pinch
points.
1. With the backhoe secured in the transport position
(refer to Preparing for Transport, page 12), move the
backhoe to a level storage area and stop the engine.
WHAT CAN HAPPEN
• You could pinch and/or cut your fingers when
adjusting the seat.
2. Remove the hairpin cotters and pins securing the side
bars and remove the side bars.
3. Pin the side bars in the storage positions as illustrated
in Figure 13.
HOW TO AVOID THE HAZARD
• Take care to keep your fingers away from the
seat mounting bracket when moving the seat up
and down and when lowering the seat into
position.
1. Stop the engine.
2. Tilt the seat forward.
3. Loosen the knobs on the bottom of the seat (Fig. 12)
and slide the seat forward or back as needed.
m–4590
4. To adjust the seat height, remove the hairpin cotter and
pin from the seat stand (Fig. 12) and raise or lower the
seat as required.
Figure 13
4. Start the engine.
5. Remove the linch pins securing the links and remove
the links.
Note: You may need to adjust the tilt lever slightly to
loosen the links.
8
Operation
6. Secure the links and two linch pins for storage on the
pins on the backhoe and the other two linch pins on the
traction unit tilt cylinder pin.
Note: Always use the traction unit to lift and move the
attachment.
7. Tilt the backhoe forward slowly until the storage
supports on the backhoe receiver plate and the bucket
contact the ground.
Operation Checklist
To ensure safe, effective use of the backhoe, ensure that
you complete the following activities before, during, and
after operating the backhoe:
CAUTION
POTENTIAL HAZARD
• If the backhoe is removed from the traction
unit without a bucket installed on the
dipperstick, the backhoe will be unstable.
Note: For detailed descriptions of these procedures, refer
to Installing the Backhoe on the Traction Unit (page 6)
and Operating the Backhoe (page 10).
Before Operation:
WHAT CAN HAPPEN
• The backhoe could tip over injuring you or
other bystanders and damaging the backhoe.
• Locate and mark underground utilities.
• Install the counterweight on the traction unit.
HOW TO AVOID THE HAZARD
• Do not remove the backhoe from the traction
unit without first installing a bucket onto the
backhoe.
• Install the links between the backhoe and the tilt
cylinder pin on the traction unit.
• Install the side bars between the backhoe and the
traction unit frame.
8. Stop the engine.
• Install the hydraulics lever clamp over the traction unit
controls.
9. Move the auxiliary hydraulic lever forward, backward,
and back to the neutral position to relieve hydraulic
pressure at the hydraulic couplers.
• Lower the stabilizer arms before digging.
10. Slide the collar back on hydraulic couplers and
disconnect them.
During Operation:
Only operate the backhoe from the backhoe seat.
11. Install protective covers onto the hydraulic couplers on
the traction unit.
Only move the traction unit from the traction unit
operator’s position and not from the seat of the backhoe.
12. Connect the attachment hoses together to prevent
hydraulic system contamination during storage.
After Operation:
13. Disengage the attachment lock pins by turning them to
the outside.
Install the pins securing the boom from moving up and
down and side to side (Figs. 17 and 18) before leaving the
backhoe unattended.
14. Start the engine.
15. Tilt the mount plate forward and back the traction unit
away from the backhoe.
9
Backhoe Overview
You can also move the boom control lever into an
intermediate position (i.e., forward and left, forward and
right, rearward and left, or rearward and right) to swing
the boom at the same time as you raise or lower it.
Figure 14 illustrates the backhoe. Familiarize yourself
with all of the components listed in Figure 14.
2
Dipperstick/Bucket Control Lever
3
4
Move the dipperstick/bucket control lever forward to
extend the dipperstick and rearward to retract the
dipperstick. Move the dipperstick/bucket control lever to
the right to dump the bucket and move it left to load the
bucket.
1
7
You can also move the dipperstick/bucket control lever
into an intermediate position (i.e., forward and left,
forward and right, rearward and left, or rearward and
right) to extend or retract the dipperstick at the same time
as you load or dump the bucket.
5
6
m–4587
Figure 14
1.
2.
3.
4.
Operating the Backhoe
5. Bucket
6. Stabilizer
7. Speed adjustment valve
Seat
Controls
Boom
Dipperstick
Preparing the Backhoe
1. Drive to the work location.
2. If your traction unit has a parking brake, engage it.
3. Pull the auxiliary hydraulics lever to the operator grip
and install the hydraulics lever clamp by pushing it
over the hand grip and sliding it right so that the pin
through the clamp slides under the right hand grip
(Fig. 16).
Controls
Familiarize yourself with all of the controls listed in
Figure 15 before you operate the backhoe.
1
2
1
2
3
3
m–4546
Figure 15
1. Stabilizer control levers
2. Boom control lever
m–4641
3. Dipperstick/bucket control
lever
Figure 16
1. Hydraulics lever clamp
2. Pin
Stabilizer Control Levers
3. Auxiliary hydraulics lever
4. Push the stabilizer control levers forward to lower both
stabilizers until they touch the ground and the front
wheels of the traction unit come off of the ground
slightly.
Move the stabilizer control levers forward to lower the
stabilizers and rearward to raise the stabilizers.
Boom Control Lever
5. Remove the two pins locking the boom in place (Figs.
17 and 18) and place them in the storage positions
(Fig. 19).
Move the boom control lever forward to lower the boom
and rearward to raise the boom. Move the boom control
lever to the right to swing the boom to the right and move
it left to swing the boom to the left.
Note: One pin prevents the boom from swinging side to
side (Fig. 17) and the other prevents the boom from
moving up and down (Fig. 18).
10
A
1
2
m–4548
Figure 17
1. Pin
B
2. Linch pin
C
2
1
m–4550
Figure 18
1. Pin
m–4554/4555/4556
2. Linch pin
Figure 20
To empty the bucket you swing it to the left or right and
extend the dipperstick and uncurl bucket, dumping the
load (Fig. 21).
A
1
B
m–4557/4558
2m–4549
Figure 19
1. Pin
2. Linch pin
Figure 21
Digging a Hole
The distance you extend the dipperstick and bucket and
the size of bite you take will vary greatly with the soil
type, moisture content of the soil, and obstructions in the
soil, such as tree roots and rocks.
Using a backhoe with precision and proficiency takes time
and practice. In general you dig a hole by extending the
dipperstick and bucket, lowering them into the ground,
and then pullback on the dipperstick while raising the
boom and curling the bucket rearwards (Fig. 20).
Spend some time practicing with the backhoe to get the
feel for how it operates and how to best use it in the
conditions in which you work. Please read and use the
following tips when operating the backhoe:
11
• Do not dig too close to the backhoe body or stabilizers.
The backhoe could undercut the stabilizers or traction
unit causing the machine to fall into the hole.
CAUTION
WARNING
POTENTIAL HAZARD
• If you do not secure the boom, it could swing or
lower during transport.
WHAT CAN HAPPEN
• The traction unit could become unstable
causing loss of control and you or bystanders
could be injured.
POTENTIAL HAZARD
• If you dig too close to the backhoe, the backhoe
could fall into the hole.
WHAT CAN HAPPEN
• The backhoe and traction unit could tip on top
of you into the hole causing severe injury.
HOW TO AVOID THE HAZARD
• Always secure the boom before transport with
the traction unit of on a trailer.
HOW TO AVOID THE HAZARD
• Ensure that you do not dig within three feet of
the backhoe or stabilizers.
5. Remove the hydraulics lever clamp (Fig. 16).
6. Secure the clamp under the backhoe seat by inserting
the end of the pin in the clamp into the hole in the seat
support (Fig. 22).
• Do not take large bites of soil. Instead, sweep the
bucket through the soil using the swinging motion of
the dipperstick a few inches deep at a time.
• If the bucket catches in the soil, uncurl the bucket,
raise the boom slightly, and continue digging.
• If your traction unit has a speed selector, set it to the
fast position (rabbit) while you are learning how to
operate the backhoe (this will slow the backhoe down).
Set it to the slow position (turtle) once you feel you
have mastered the use of the backhoe.
2
• If your traction unit has a flow divider, set it to the 11
o’clock position.
1
3
m–4644
Figure 22
Preparing for Transport
1. Pin
2. Clamp
1. Fully raise the boom, retract the dipperstick, and curl
the bucket rearward (Fig. 14). Ensure that you center
the boom locking pin holes as much as possible.
3. Hole in seat support
7. Slowly transport the backhoe as needed.
2. Pull the stabilizer levers rearward until the stabilizers
are fully raised.
Maintenance
3. Stop the engine and remove the key.
4. Secure the boom using the two pins removed prior to
operation (Figs. 17 and 18).
CAUTION
POTENTIAL HAZARD
• If you leave the key in the ignition switch,
someone could start the engine.
WHAT CAN HAPPEN
• Accidental starting of the engine could seriously
injure you or other bystanders.
HOW TO AVOID THE HAZARD
• Remove the key from the ignition switch before
you do any maintenance.
12
Service Interval Chart
Service Operation
8
Storage
Hours Service
Grease fittings
X
Chipped surfaces–paint
X
X
Greasing and Lubrication
Service Interval/Specification
Grease all fittings every 8 operating hours (Fig. 23). Note
that in most cases the grease fittings are located in the
center of every pivot pin. Grease all fittings immediately
after every washing.
m–4587
Grease Type: General-purpose grease
How to Grease
1. Stop the engine and remove the key.
2. Clean the grease fittings with a rag.
3. Connect a grease gun to each fitting.
4. Pump grease into the fittings until grease begins to
ooze out of the bearings.
m–4552
5. Wipe up any excess grease.
Figure 23
Changing the Bucket
Orientation
You can change the angle that the bucket is mounted on
the dipperstick to a position that allows you to dig more
vertically. This will allow you to dig very close to a
foundation, or dig a square sided hole. To change the
orientation, complete the following procedure:
1. Remove the bolts and nuts securing the upper bucket
pin (Fig. 24).
2. Remove the pin.
3. Swing the bucket up, aligning the second set of holes
with the mounting holes on the dipperstick (Fig. 24).
4. Secure the bucket with the pin, bolt, and nut removed
previously.
13
m–4589
The two valves that control the left and right swing of the
boom are located inside of the controls access panel
(Fig. 26). To access these valves, remove six locknuts and
the panel. Adjust both valves equally. Replace the access
panel when finished.
1
4
4
5
1
2
3
Figure 24
4. Nut
5. Second set of holes
1. Dipperstick
2. Upper bucket pin
3. Bolt
m–4587
Figure 26
1. Controls access panel
Changing the Boom Speed
You can change the speed that the boom moves up and
down and left and right by changing the setting of three
speed adjustment valves. The valve that controls the up
and down movement is located on top of the boom (Fig.
14).
To adjust the valves, complete the following procedure
and refer to Figure 25.
1. Loosen the set screw located on the side of the knob
on the valve.
2. To increase the speed of the boom, turn the knob
counter-clockwise.
3
3. To decrease the speed of the boom, turn the knob
clockwise.
1
4. Tighten the set screw.
4
Storage
5
1. Before long term storage wash the attachment with
mild detergent and water to remove dirt and grime.
2
m–4551
2. Apply grease to all grease fittings.
Figure 25
1. Speed adjustment valve
2. Knob
3. Set screw
3. Check and tighten all bolts, nuts, and screws. Repair or
replace any part that are damaged or worn.
4. Slow
5. Fast
4. Paint all scratched or bare metal surfaces. Paint is
available from your Authorized Service Dealer.
5. Store the attachment in a clean, dry garage or storage
area. Cover it to protect it and keep it clean.
14
Troubleshooting
PROBLEM
Backhoe does not operate
Backhoe is operating slowly
Backhoe fails to hold up
p a load (all
(
loads will
ill normally
normall settle down
do n
over a long period of time)
Hydraulic
y
oil leakage
g
POSSIBLE CAUSES
CORRECTIVE ACTION
1. Hydraulic coupler not
completely connected
1. Check and tighten all couplers.
2. Auxiliary hydraulics valve on
the traction unit is not fully
engaged.
2. Engage the valve.
3. Transport pins were not
removed.
3. Remove the pins.
4. Hydraulic fluid level is low.
4. Fill the traction unit hydraulic
tank.
5. Damaged hydraulic coupler
5. Check couplers and replace
any that are defective.
6. Obstructed hydraulic hose
6. Find and remove the
obstruction.
7. Pinched hydraulic hose
7. Replace the hose.
8. Auxiliary hydraulic valve on the
traction unit is not opening.
8. Repair the valve.
9. Hydraulic coupler not
completely connected
9. Check and tighten all couplers.
10.Bent piston rod
10.Contact your Authorized Toro
Dealer.
1. Hydraulic oil is cold.
1. Allow the engine to warm the
oil before operating.
2. Engine speed is too slow.
2. Increase the throttle speed of
the traction unit.
3. Speed adjustment valve is set
too slow.
3. Adjust the speed adjustment
valve to obtain the desired
speed.
4. Pinched hydraulic hose
4. Replace the hose.
5. Speed adjustment valve is
leaking oil.
5. Contact your Authorized Toro
Dealer.
6. Damaged cylinder
6. Contact your Authorized Toro
Dealer.
7. Damaged hydraulic pump
7. Contact your Authorized Toro
Dealer.
1. Damaged hydraulic hose
1. Replace the hose.
2. Damaged cylinder
2. Contact your Authorized Toro
Dealer.
3. Damaged control valve
3. Contact your Authorized Toro
Dealer.
1. Damaged hydraulic hose
1. Replace the hose.
2. Damaged hydraulic system
2. Contact your Authorized Toro
Dealer.
15
PROBLEM
POSSIBLE CAUSES
CORRECTIVE ACTION
Swing cylinder malfunctioning
1. Damaged cylinders, swing
restrictors, or cross-over relief
valve
1. Contact your Authorized Toro
Dealer.
Control valve sticking
g or working
g
hard
1. Dirty hydraulic oil
1. Change the hydraulic oil.
2. Damaged or dirty valve
2. Contact your Authorized Toro
Dealer.
3. Damaged cylinder
3. Contact your Authorized Toro
Dealer.
1. Hydraulic fluid level is low.
1. Fill the traction unit hydraulic
tank.
2. Air in the hydraulic system
2. Extend the cylinders as far as
possible and hold them in an
extended position for several
seconds.
3. Hydraulic oil is cold.
3. Allow the engine to warm the
oil before operating.
4. Pinched hydraulic hose
4. Replace the hose.
Backhoe operation is spongy or
jjerkyy
16
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