Western Star 47X 2020, Руководство по обслуживанию

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and lubrication instructions, see Group 42 of
the 47X and 49X Workshop Manual.
For slack adjusters with grease fittings and for oper-
ating temperatures above –40°F (–40°C), use an
NLGI Grade 1 clay-base grease, or an NLGI Grade 1
or 2 lithium-base grease.
For slack adjusters with grease fittings and for oper-
ating temperatures below –40°F (–40°C) and above
–65°F (–54°C), use an NLGI Grade 2 synthetic oil,
clay-base grease.
Lubricate the slack adjuster at the grease fitting until
grease is forced past the pressure-relief capscrew or
past the gear splines around the inboard snap ring.
See
Fig. 7 . Follow the steps below for proper
greasing.
Steer Axle Slack Adjuster
Greasing
1. Park the vehicle on a level surface, shut down
the engine, and set the park brake.
2. Chock the drive-axle tires.
3. Chock steer-axle tires.
4. Grease the slack adjuster.
Drive Axle Slack Adjuster
Greasing
1. Park the vehicle on a level surface, shut down
the engine, and set the park brake.
2. Chock the front tires.
3. Chock one drive-axle tire.
4. Cage the drive-tire park-brake chamber opposite
of the tire that is chocked.
5. Grease the slack adjuster on the caged brake
side only.
6. Uncage the park brake.
7. Move the drive-tire chock to the other side of the
axle and chock the other set of tires.
8. Cage the drive-tire park-brake chamber opposite
of the tire that is chocked.
9. Grease the slack adjuster on the caged brake
side only.
10. Uncage the park brake
11. If equipped with more than one drive-axle, repeat
this process for the remaining drive-axles.
42–09 Bendix E-6 Foot Control
Valve Inspection and
Lubrication
1. Remove the brake valve from the vehicle; see
Group 42 , of the Western Star 47X and 49X
Workshop Manual.
2. Remove the roll pin from the brake pedal pivot
pin. See
Fig. 8 .
3. Remove the brake pedal pivot pin.
4. Remove the brake pedal.
5. Check the brake pedal mounting plate adapter
for signs of wear or cracks at the bosses (the
area from which the pivot pin was removed). Re-
place it if necessary.
6. Check the brake pedal rollers for signs of wear
or cracks. Replace the rollers as needed.
7. If the rollers are replaced, replace the roller pin,
install a new cotter pin, bend it to 90 degrees
f420012a
10/20/93
1
2
3
4
5
6
7
1. Brake Chamber
2. Clevis
3. Actuator Rod
4. Boot
5. Pressure-Relief Capscrew, Gasket, Pawl Spring,
and Pawl
6. Manual Adjusting Nut
7. Grease Fitting (or plug)
Fig. 7, Meritor Automatic Slack Adjuster
Brakes
42
47X and 49X Maintenance Manual, August 2020
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