8-56
Published 01-14-2021 Control # 707-01
CARRIER
TMS9000-2 SERVICE MANUAL
Clean and Inspect Parts
1.
Clean all polished metal parts such as inner bore, gear,
and worm with solvent cleaners.
2.
Use soap and water to clean all nonmetallic parts. Dry all
parts with soft clean paper or cloth.
3.
Apply brake lubricant to all parts except the linings and
drums to prevent rust.
Inspect Parts
1.
Check the spider for expanded anchor pin holes and
cracks. Replace damaged spiders and anchor pin
bushings.
2.
Check the camshaft bracket for broken welds, cracks,
and correct alignment.
3.
Check anchor pins for corrosion and wear. Replace
damaged anchor pins.
4.
Check brake shoes for rust expanded rivet holes, broken
welds, and correct alignment. Anchor pin holes must not
exceed 26 mm (1.03 in) in diameter. The distance from
the center of the anchor pin hole to the center of the
roller hole must not exceed 327 mm (12.875 in).
5.
Check the camshaft for cracks, wear, and corrosion.
Check the cam head, bearing journals, and splines.
6.
Check the slack adjuster for the gap between the clevis
and collar. If the gap exceeds 1.5 mm (0.060 in), replace
the clevis. Check the clevis pins and bushing in the slack
adjuster arm. Replace bushing if diameter exceeds 16.6
mm (0.65 in).
7.
Rotate the slack adjuster adjusting nut through a 360
degree rotation (about 22 turns of the adjusting nut) with
a torque wrench. Torque must be less than 2.8 Nm
(25 lb-in) for a new or rebuilt slack adjuster.
8.
Check the brake drums for cracks, severe heat
checking, heat spotting, scoring, pitting, and distortion.
9.
Measure the inside diameter of the drum in several
locations
and
replace
if
diameter
exceeds
manufacturers specifications.
10.
Check dust shields for rust and distortion. Replace as
necessary.
Assemble Brakes
Each time the brakes are relined, the following parts should
also be replaced.
•
Springs
•
Rollers
•
Anchor Pins
•
Clevis Pins
•
Camshaft Seals
Camshaft Installation
1.
Check all spider bolts for the correct torque as shown
below (Figure 8-54).
2.
Install new camshaft seals and, if required, bushings in
both the spider and camshaft bracket (Figure 8-55). Use
a seal driver to install the bushings.
WARNING
Death or Injury Could Occur!
Solvent cleaners can be flammable, poisonous, and
cause burns.
CAUTION
Damage Could Occur!
Do not use solvent cleaners on nonmetallic parts.
Retainer Spring
7093-5g
FIGURE 8-53
Bolt Size
7/16” -20
1/2” -20
9/16” -18
7/8” -18
85
-102
115
-156
176 -224
244 -312
Nm
Pounds-Foot
60
-75
85
-115
130 -165
180 -230
7093-5h
FIGURE 8-54
Fo
r
