How to check caterpiller TH360B Telehandler and adjust boom wear pad clearance
Caterpillar ET 2023A, 2022A & 2019C Electronic Technician Diagnostic Software
The clearance between the wear pads and the boom
section should be checked at more frequent intervals
when the machine is operated in severe conditions.
Note: Sand or grit particles can cause accelerated wear
to the wear pads.
1. Park the machine in a clear area on level ground
and chock the wheels.
The boom can fall if a control is moved or if a hydraulic
component fails. This can cause personal injury or
death. Support the boom with stands. Do not rely on the
cylinder to hold the boom up
Raise the boom to the horizontal position and fully
extend the boom. Install a suitable stand under the
first section in order to prevent the boom from
falling unexpectedly. Do not support the second
and third sections. To properly support the boom,
use the following tools:
Stop the engine.
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3. Measure clearances (1) between the wear pads
and the side of the boom sections at each side.
4. Measure clearances (2) between the wear pads
and the top of the boom sections.
5. Raise the boom and remove the stand. Fully
retract the boom and support the boom in the
horizontal position. In order to support the boom,
install the stand under the third section or install
cribbing under the quick coupler.
6. Remove the cover from the rear of the chassis and
measure clearances (3) between the rear wear
pads and the side of the boom sections at each
side.
7. Measure clearances (4) between the rear wear
pads and the top of the boom sections.
8. The clearance at each location must not exceed 1.5
mm (0.06 inch). If the clearances are excessive,
adjustments must be made.
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8 Note: The bolts that secure different wear pads are not
identical lengths. Do not mix the bolts. Clean all used
bolts. Before installation, apply thread lock compound to
bolts that secure wear pads.
9 Loosen bolts (5) that secure the rear top wear
pads. Install sufficient shims in order to reduce the
clearance to 0.75 mm (0.030 inch). Apply 9S-3263
Thread Lock Compound to the bolts. Tighten the
bolts to a torque of 75 ± 5 Nm (55 ± 4 lb ft).
10 Remove bolts (6) that secure the rear side wear
pads. Install sufficient shims in order to reduce the
clearance to 0.75 mm (0.030 inch) at each side.
Install sufficient shims in order to produce an equal
clearance between the boom sections at each side.
It may be necessary to install more shims
11 Raise the boom sufficiently above the stand. Fully
extend the boom and lower the boom to the
horizontal position. Support the boom under the
third section.
12 4. Remove bolts (7) that secure the bottom wear
pads. Install sufficient shims in order to reduce the
clearance to 0.75 mm (0.030 inch). Apply 9S-3263
Thread Lock Compound to the bolts. Tighten the
bolts to a torque of 75 ± 5 Nm (55 ± 4 lb ft).
5. Remove bolts (8) that secure the side wear pads.
Install sufficient shims in order to reduce the
clearance to 0.75 mm (0.030 inch) at each side.
Install sufficient shims in order to produce an equal
clearance between the wear pads and the boom
sections at each side. It may be necessary to
install more shims at one side than the other side.
Apply 9S-3263 Thread Lock Compound to the
bolts. Tighten the bolts to a torque of 75 ± 5 Nm
(55 ± 4 lb ft).
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11. Fully extend and retract the boom at angles of 0
degrees, 45 degrees and 70 degrees. The boom
operation must be smooth. If the boom operation is
not smooth, operate the boom with a load of 500
kg (1100 lb) on the attachment. Fully extend the
boom and retract the boom at an angle of 45
degrees. Repeat ten times.
12 Extend the boom and lower the work tool to the
ground. Lower the boom to the ground and fully
extend the boom. Check the temperature of the
top surfaces of number 1 boom section and
number 2 boom section. Check the temperature of
the wear pads at opposite locations at positions (A)
and at positions (B). Both sides of each section
should feel the same temperature. If necessary,
increase the thickness of the shims under the rear
wear pad which is in contact with the cool side of
the boom section. Alternatively, decrease the
thickness of the shims under the front wear pad
which is in contact with the hot side of the boom
section
13 Install the cover on the rear of the boom.
