Manitowoc Grove TMS800E Service And Maintenance Manual page 325

TMS800E SERVICE MANUAL
10. Check to ensure that the ring is installed correctly in the
groove. You cannot pull the piston out of the actuator if
the retaining ring is installed correctly.
11. 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.
12. Make sure the pull pawl is disengaged, and install the
actuator assembly into the housing so that the actuator
slides along the worn splines.
13. Fill the boot with grease and slip it over the actuator rod.
Do not seal the boot to the tapered part of the actuator
rod. The top of the boot must fit into the groove.
14. Press the boot metal ring into the slack adjuster housing.
15. Remove the screwdriver or equivalent tool from the pull
pawl. The pull pawl will re-engage automatically.
16. Use a grease gun to lubricate the slack adjuster through
the grease fitting. If necessary, install a camshaft into the
slack adjuster gear to minimize the grease flow through
the gear holes.
17. Apply lubrication until new grease purges from around
the camshaft splines and from the pawl assembly.
Adjust the Brakes
NOTE: For more information on the brakes, refer to
Volume 2 - Service Maintenance Manual or the
Arvinmeritor web site.
Measure Free Stroke
When performing preventive maintenance on the brakes,
check both the free stroke and adjusted chamber stroke.
Free stroke sets the clearance between the linings and
drum. The free stroke may be slightly longer than 12.7 to
15.9 mm (0.5 to 0.625 in). This is acceptable if the adjusted
chamber stroke is within the limits outlined in the brake
manufacturer's maintenance manual.
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. Replace damaged
pawls before putting vehicle in service.
1. Disengage a 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.
2. Use a wrench to turn the adjusting nut counterclockwise
until the brake shoe contacts the drum (Figure 8-61).
GROVE
Then back off the adjusting nut in the opposite direction
1/2 turn for drum brakes.
3. Measure the distance from the center of the large clevis
pin to the bottom of the air chamber while the brake is
released. The measurement is indicated with an "X" in
(Figure 8-62).
4. Use a pry bar to move the slack adjuster and position the
linings against the drum, brakes applied. Measure the
same distance again while the brakes are applied. The
measurement is indicated with a "Y" in (Figure 8-62).
Do not set free stroke shorter than 12.7 to 15.9 mm (0.5 to
0.625 in) for drum brakes. If the measurement is too short,
linings can drag. Damage to the components can result.
5. Subtract measurement "X" from "Y" (Figure 8-62) to
obtain free stroke.
6. If the
specification, turn the adjusting nut 1/8 turn in the
direction shown in (Figure 8-63), and check the free
stroke again. Continue to measure and adjust stroke
until the measurement is within specification.
Published 01-29-2014, Control # 496-00
UNDERCARRIAGE
Disengage pawl
6600-9
Free Stroke = Y Minus X
Drum brake free stroke must
be 12.7 mm to 15.9 mm (0.5
to 0.625 in)
CAUTION
free stroke measurement
FIGURE 8-61
6600-10
FIGURE 8-62
8
is not within
8-43