TRUCK SERVICE MANUAL
BRAKES-AIR
A.
Remove wedge assembly from plunger housing
E. Unscrew the power unit out of the plunger
by pulling it straight out of housing.
housing. At this time remove and inspect the wedge
assembly. Service if necessary.
11/2" Stroke Wedge Assembly
SERVICE
CURRENT
AIR CHAMBERS
DISASSEMBLE
13/4" Stroke Wedge Assembly
A.
To disassemble air chamber follow procedures A
thru F of Servicing Air Chamber Diaphragm,
B.
Remove cotter or "E" washer (earlier design not
Page204,
disregarding
wedge
assembly
shown) from wedge shaft while holding spring
precautions.
compressed by hand.
ASSEMBLE
C.
Remove wedge spring washer, wedge spring,
NOTE:
Adjusting type non-pressure housing is
rubber boot (13/4" assembly) and wedge spring
interchangeable with bottoming type housing and may be
retainer.
converted at this time.
A.
To install boot and guide and reassemble
chamber, follow procedures H thru L of Servicing
Air Chamber
Diaphragm,
page 204
disregarding wedge assembly precautions.
B. Test for leaks.
D.
Insert a thin bladed screwdriver between one flat
WEDGE ASSEMBLY
of the wedge head and roller retainer cage.
Spread the cage open just far enough to remove
DISASSEMBLE
the rollers.
IMPORTANT: DO NOT ATTEMPT TO DRIVE THE
WEDGE THROUGH THE ROLLERS AND CAGE OR
FORCE THE ROLLERS THROUGH THE SLIGHTLY
CLOSED SLOTS OF THE CAGE.
THIS WILL
PERMANENTLY DAMAGE THE CAGE.
E. Remove the roller retainer cage by sliding it off the
wedge shaft.
Do not mix components from 12 and 1/4 stroke
wedge assemblies.
206
