Grove
Published 01-14-2021 Control # 707-01
7-33
TMS9000-2 SERVICE MANUAL
POWER TRAIN
7
Clutch Adjustment Procedure
Remove the inspection plate from the bottom of the clutch
housing and make the following inspections and adjustments
if required.
The release levers of new or factory exchange cover
assemblies are properly adjusted and locked at assembly
and will not require further adjustment. However, after the
transmission has been securely attached to the engine, the
release sleeve must be adjusted until the correct distance
between the surface of the release bearing housing and the
front brake disc is obtained.
1.
Clutch brake squeeze should begin 25.4 mm (1.0 in)
above the pedal stroke. This is controlled by adjusting
the rod end bearings evenly at each rod end. Lengthen
the rod to squeeze closer to end of pedal stroke.
2.
Visually check the travel of the release bearing after
working the pedal several times. Release travel should
be 12.7 to 14.3 mm (0.5 to 0.5625 in).
3.
Make internal clutch adjustment for proper clearance as
follows.
a.
Insert a 3/4 inch socket (12 points) or a 3/4 inch box
end wrench through the inspection hole and
depress the square headed bolt to adjust the clutch.
b.
Turning the bolt 2-1/3 rotations changes the
adjustment 3.175 mm (0.125 in). The Kwik-Adjust
will re-engage at a quarter of a turn. The flat of the
bolt will align with the flat edge of the bracket.
4.
Set the clutch pedal free travel to 25.4 to 38.1 mm (1.0 to
1.5 in) using the adjusting screw on the clutch pedal
adjusting lever.
5.
After all adjustments are made, tighten all jam nuts to
lock rod end bearings to the control rods and pivot arms.
6.
Install the inspection plate on the bottom of the clutch
housing and road test the crane for proper clutch
operation.
Clutch Adjustment Inspection Procedure
1.
Remove the inspection plate from the bottom of the
clutch housing.
2.
Depress the clutch pedal several times and check for the
9.525 to 12.7 mm (0.375 to 0.5 in) release bearing
travel. Readjust if necessary.
3.
Check the clutch pedal for 38.1 mm (1.5 in) of free travel.
Readjust if necessary.
4.
Install the inspection plate on the bottom of the clutch
housing and road test the crane for proper clutch
operation.
General Maintenance
1.
Never underestimate the necessity of perfect clutch
balance. For example, just 3 ounces of clutch unbalance
at 300 RPM is enough to fracture a crankshaft!
2.
Pressure plates dished as much as 0.060 inch (1.5 mm)
are re-ground by some rebuilders! Not enough metal
remains to dissipate heat. That means quick failure.
3.
You should never wait for a clutch to slip before
adjusting! Regular inspection of the release bearing
clearance insures proper adjustment.
4.
Misalignment will cause chatter, grab, drag, or
vibration... or all four! Alignment of clutch and all other
drive-line parts should be checked before taking crane
off dead-line.
GEARSHIFT
Description
The remote location of the transmission from the shift lever in
the cab requires a mechanical linkage between the cab and
transmission case.
A master control unit is attached to the bottom of the
gearshift lever under the cab floor and is mechanically
connected by a universally jointed rod to a slave shifter unit
on top of the transmission case. All of the motions of the
gearshift lever are, in this way transmitted to the shift fingers
that engage the shift bars and locks of the transmission
case.
NOTE:
Range shifts for the transmission, are controlled by
air operated master and slave valves.
Fo
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Reference
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