MERITOR-TP-9853
MERITOR WEDGE BRAKES
MAINTENANCE MANUAL NO. 4R
FEBRUARY 1995
MERITOR-TP-9853 - Page 13 of 32
Section 2
Disassemble Brakes
9
Remove the Air Chamber and
the Wedge Assembly
1. Remove all air from the air brake system.
When the brake has a spring chamber, cage
the spring.
2. Label the air lines. Disconnect them from the
air chamber. Plug the lines and ports to keep
contamination out of the system.
3. Remove any support brackets from the air
chamber.
4. Use a brass drift and a hammer to loosen the
collet nut on the air chamber.
5. Remove the air chamber.
6. Remove the wedge assembly.
Disassemble the
Wedge Assembly
Figure 2.3
WARNING
Hold the spring when you remove the cotter pin.
Sudden release of a compressed spring can cause
serious personal injury.
1. Compress the spring. Remove the cotter pin.
Slowly release the spring.
2. Remove the washer, spring, boot and retainer.
CAUTION
Do not force open the roller cage more than
necessary to remove the rollers. Do not force the
rollers through the slots in the cage. Do not force
the wedge through the rollers. Damage to the
roller cage will result.
3. Use a screwdriver between the wedge and the
roller cage to carefully force open the cage just
enough to remove the rollers.
Figure 2.4.
4. Remove the roller cage from the wedge.
Disassemble the Air Chamber
Figure 2.5
Figure 2.3
RETAINER
ROLLER
BOOT
SPRING
COTTER
PIN
WEDGE
WEDGE
ANGLE
STAMPED
HERE
WASHER
ROLLER
ROLLER
CAGE
Figure 2.4
Figure 2.5
SPRING
CHAMBER
WARNING:
Do NOT loosen or
remove this clamp.
WEDGE
GUIDE
BOOT
RETAINER
DIAPHRAGM PLATE
AND PUSH ROD
DIAPHRAGM
PRESSURE
HOUSING
CLAMP BOLT
AND NUT
CLAMP
RING
RIVET
BOOT (SEAL)
NON-PRESSURE
HOUSING
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