Manitowoc Grove TMS800E - Maintenance

8-41
TMS800E SERVICE MANUAL UNDERCARRIAGE
8
GROVE
Published 01-29-2014, Control # 496-00
Maintenance
Removal
1. Disengage the pull pawl. Use a screwdriver or
equivalent tool to pry the pull pawl at least 0.8 mm (1/32
inch) to disengage the teeth from the actuator.
2. Use a wrench to turn the manual adjusting nut clockwise
until the brake shoes are fully retracted, and the lining
clears the drum.
3. Remove both clevis pins, retainer clips or cotter pins.
Move the slack adjuster away from the clevis. Discard
the retainer clips and cotter pins and replace with new
ones.
Disassembly
1. Use a punch and hammer to tap the metal boot retaining
ring from the slack adjuster housing.
2. Remove the boot from the housing. Pull the actuator
assembly from the housing (Figure 8-52).
3. Use a small screwdriver to push down on one side of the
piston retaining ring to force the ring out of the groove
(Figure 8-53).
4. Extend the coils of the ring. Use pliers to unwind the ring
and pull it out of the groove. Use a new ring when you
assemble the slack adjuster (Figure 8-53).
5. Pull the actuator rod, piston and pin from the actuator.
6. If necessary, remove the pin from the rod and piston
(Figure 8-54).
7. Inspect the clevis bushing in the slack adjuster arm for
wear or damage. Replace a worn or damaged bushing.
Check the bushing’s diameter to ensure it does not
exceed 13.5 mm (0.531 in) (Figure 8-55). If the
bushing’s diameter exceeds 13.5 mm (0.531 in), replace
the bushing.
8. Use a small screwdriver to remove the grease seal from
around the worm bore (Figure 8-56). Discard the seal.
Install a new seal when you assemble the slack adjuster.
CAUTION
You must disengage a pull pawl before rotating the
manual adjusting nut, or you will damage the pawl teeth. A
damaged pawl will not allow the slack adjuster to
automatically adjust brake clearance.
CAUTION
When you remove a clevis pin that has S spring, hold the
spring with pliers. The spring can disengage from the
clevis with enough force to cause serious personal injury.
FIGURE 8-52
6600-1
FIGURE 8-53
6600-2
Pull ring out
Push ring down
6600-3
Pin
Piston
Actuator Rod
FIGURE 8-54
6600-4
FIGURE 8-55
Bushing
Reference Only