6.
To adjust, release brakes.
7.
Place a 9/16" box end or socket wrench on
the slack adjuster adjusting nut
(See
Figure 4-12)
, and push in on the locking
sleeve.
8.
Adjust by rotating the adjusting nut
counterclockwise to loosen the brake and
clockwise to tighten the brake.
9.
Remeasure air chamber push rod travel
from release to full brake application. If the
adjustment is not within the “IN-SERVICE”
criteria readjust. If the adjustment has
brought the travel to within specifications,
proceed to the next step.
10.
Remove wrench from slack adjuster.
Check locking sleeve to verify that it has
sprung back out and is locking the
adjusting nut. If not, the adjuster will have
to be rotated slightly.
b. Disassembly (See Figure 4-11)
1.
Release brakes and back off slack
adjuster.
2.
Remove slack adjuster lock ring and slack
adjuster.
3.
Remove drum assembly.
4.
Disengage the roller retainers from the
rollers.
5.
Press down on the bottom brake shoe and
remove the lower cam roller. Lift the top
shoe and take out the top cam roller.
6.
Lift out the shoe retractor spring, which is
now free of tension.
7.
Swing the lower shoe back approximately
180° to relieve the tension on the shoe
keeper springs. Remove the springs and
slip the shoes off the anchor pins.
8.
Remove camshaft lock ring, spacer
washer(s) and camshaft.
9.
After removing the shoes, completely
inspect all brake components, servicing as
necessary.
c. Reassembly
1.
Install new anchor pin bushings, camshaft
bushing, and camshaft seals into the
spider.
IMPORTANT
WHEN INSTALLING CAMSHAFT SEALS, THE
SEAL ON THE SLACK ADJUSTER SIDE IS IN-
STALLED FACING INTO THE SPIDER. THIS AL-
LOWS GREASE TO PURGE OUTSIDE THE
BRAKE ASSEMBLY WHEN GREASING THE
CAMSHAFT BUSHING.
2.
Install cam roller, retainer clip and retractor
spring retainers onto the brake shoes.
3.
Install 1/8" thick camshaft washer onto the
camshaft.
4.
Install the cam shaft into the spider. Install
spacer washer and lock ring retainer on
camshaft before sliding the camshaft
through the camshaft support bracket.
Install the slack adjuster, washer, and lock
ring retainer.
5.
Install the brake keeper springs onto the
shoes. Install shoes onto the spider by
placing shoes in place on the anchor pins,
then “wrap” the two shoes into place about
the spider.
6.
Install the shoe retractor spring onto the
shoes.
7.
Connect the slack adjuster to the brake
chamber pushrod.
8.
Adjust brakes as outlined in brake
adjustment procedures.
4-18
Содержание 330B
Страница 3: ...MODEL 330B SEMITRAILER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO i ...
Страница 8: ......
Страница 12: ......
Страница 20: ...3 8 Figure 3 3 Steps for Loading and Unloading ...
Страница 26: ...3 14 Figure 3 7 Rear Impact Guard System ...
Страница 34: ...4 6 Figure 4 2 330B Wiring Diagram ...
Страница 35: ...4 7 Figure 4 3 Remote Wiring Diagram ...
Страница 40: ...4 12 Figure 4 6 Examples of Camber Figure 4 7 Checking Axle for Bend ...
Страница 44: ...4 16 Figure 4 11 Axle and Brake Assembly ...
Страница 54: ......
Страница 63: ...NOTES 5 9 ...
Страница 64: ......