General Maintenance; Gearshift; Description; Maintenance - Manitowoc Grove TMS800E Service And Maintenance Manual

POWER TRAIN
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.
SYMPTON
Excessive lever travel or sloppy feel
when shifting.
Hard shifting.
Transmission locked in gear or in
neutral gearshift lever moves freely; no
detent feel.
Gearshift lever positions do not
correspond to transmission gear
ranges.
7-44

General Maintenance

1.
2.
3.
4.

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:

Maintenance

Troubleshooting
PROBABLE CAUSE
Setscrews loose in control shaft
universal joints or shift fingers.
Bent shift bar in
transmission. Damaged cross shaft or
bushings in master or slave unit.
Shift control shaft broken, U-joints
loose or disconnected, cross shaft in
slave unit broken or shift fingers loose.
Lever in master unit and cross shaft in
slave unit out of phase.
Published 01-29-2014, Control # 496-00
TMS800E SERVICE MANUAL
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!
Pressure plates dished as much as 1.5 mm (0.060 inch)
are re-ground by some rebuilders! Not enough metal
remains to dissipate heat. That means quick failure.
You should never wait for a clutch to slip before
adjusting! Regular inspection of the release bearing
clearance insures proper adjustment.
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.
Range shifts for the transmission, are controlled by
air operated master and slave valves.
Tighten or replace setscrews.
Disassemble and repair as necessary
Disassemble and repair as necessary.
Shift transmission to neutral.
Disconnect U-joints at shift control
slave unit; place gear shift lever in
neutral position. Connect U-joints and
tighten setscrews.
SOLUTION