Manitowoc Grove TMS700E Service And Maintenance Manual page 280

UNDERCARRIAGE
4. Check the linings and replace the shoes if contaminated,
cracked, or worn to less than 6.35 mm (0.25 in)
thickness at any point.
5. Inspect the spider for cracks around mounting bolt
holes, cam area, or anchor pin and replace if cracked.
6. Check the anchor pin and replace if loose or grooved
more than 0.787 mm (0.031 in) below original surface.
7. Each time the brake shoes are removed, check
camshaft radial play as outlined below:
a. Mount a dial indicator plunger on the cam head at
the roller contact area.
b. Zero the dial indicator.
c. Move the cam head up and down and note the
maximum reading.
d. If play exceeds 0.9 mm (0.035 in), rebush the air
chamber bracket. Refer to Repair/Replacement in
this Section.
e. After rebushing, recheck radial play. Replace the
camshaft if play is still excessive.
8. Check spline on the end of the camshaft for cracks and
worn or deformed splines. Replace as necessary.
9. Check the camshaft bushing journals for wear or
corrosion. If the camshaft shows visible wear or if
roughness is felt in the journal, replace the camshaft.
10. Check the camshaft head for brineling, cracking or flat
spots. Replace the camshaft if a ridge can be felt
between the worn areas and surface of the cam head.
NOTE: The camshaft bushings and seals are mounted in
the air chamber bracket assembly.
11. Check the camshaft bushings for deterioration or wear.
The inner surface must be smooth. Replace the bushing
if surface is rough or abrasive.
12. Check the grease seals and replace if nicked, cut, or
distorted.
13. Check the air chamber bracket for a bent, broken, or
cracked arm and welds. Replace as necessary.
8-28
14. Check the air chamber bracket mounting studs for
looseness, damaged threads, or bent studs. Replace as
necessary.
15. Check the air chamber for leaks, cracked housing, bent
pushrod, loose clamp ring, clogged vent holes, or loose
air fittings. Repair or replace as necessary.
16. If the air chamber is replaced or repaired, check the
distance from the clevis pin hole centerline to the air
chamber face. Reference Automatic Slack Adjuster,
page 8-44 for adjustment.
17. If a new air chamber is installed, ensure that the cutoff
pushrod does not project too far into the clevis. Minimum
clearance from the clevis centerline to pushrod end is
22.2 mm (0.875 in).
18. Check air chamber clevis pin for cracks and wear.
19. Check
Automatic Slack Adjuster, page 8-44.
Repair/Replacement
Routinely replace lower cost items such as springs, seals,
bushings, and heavily worn parts. Damage caused by failure
of worn parts is much more expensive than the cost of the
parts.
Camshaft bushing and/or grease seal replacement is as
follows:
1. Remove the air chamber bracket.
2. Drive out the old bushing and grease seal with a suitable
driver.
3. Clean and inspect the air chamber bracket. Reference
Inspection in this subsection.
4. Install the new bushings in the air chamber bracket with
a piloted driver. Both bushings are nonmetallic and are
labeled on one end. Install them with the labeled ends
facing each other. The cam head end is recessed
7.1 mm (0.281 in) and the slack adjuster end is recessed
17.5 mm (0.688 in) from the ends of the tube (see
Figure 8-22).
Published 01-29-2015, Control # 512-01
TMS700E SERVICE MANUAL
the automatic slack adjuster. Reference