21
Section 3
Mechanical Brakes
6. Install the actuator strut with the pressure
points against the shoe web pressure points
and the cam head in position in the slot of
the strut.
7. Assemble the brake drum and drive shaft
using standard procedures.
Adjust DCM Brake
Equal adjustment of the brake shoes is controlled
by the actuating lever. The only required
adjustment is through the connecting linkage to
the lever arm. The adjustment can be made after
the brake drum and drive shaft are assembled.
Assemble DCM Brake
CAUTION
Do not permit grease to contact the brake drum
or linings. Grease on the linings can cause poor
brake performance. Contaminated linings MUST
be replaced.
1. Before assembly, apply a thin layer of Meritor
specification 0-616 brake lubricant such as
Texaco Thermatex EP-2 grease or equivalent
(listed on page 31) to the following parts:
a. Cam head face and journals.
b. The sides of the shoe webs and the
actuator strut that slide together.
c. Both sides of the backing plate at the
cam hole.
2. If it was removed, install the brake backing
plate in the same position as marked in Step
10 of the Disassembly Section. Tighten the
four capscrews to the specifications set by the
OEM.
3. Install the brake shoes in the same position as
marked in Step 8 of the Disassembly Section
with the web ends in position on the backing
plate bosses.
4. Use a brake shoe installation tool to install the
four new brake shoe return springs at the
ends of the brake shoes.
5. Assemble the cam through the backing plate,
lever, lock washer and nut. Tighten the nut to
give an end play of 0.001" to 0.010" (0.025 -
0.254 mm) as measured with a feeler gauge
between the backing plate and the lever.
Figure 3.3.
