25
Section 3
Mechanical Brakes
6. Remove the brake drum using standard
procedures.
7. Disconnect and remove the shoe return
springs with a “button hook” type of
spring tool.
8. Remove the shoe and lining assemblies.
9. Disassemble the actuating lever, both shoe
levers and the wedge assembly.
10. Remove the adjusting bolt spring clip.
11. Pull the abutment pins from the bores inside
the adjusting bolts.
12. Remove both adjusting bolts.
NOTE: Make a note of how the brake backing
plate is mounted. Use the position of the slot for
the actuator lever as the reference point.
13. If complete disassembly is necessary,
remove the four brake backing plate
capscrews and washers.
14. Clean and inspect all parts. Refer to Section 4.
Assemble DM 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. Adjusting bolts.
b. Side slots and the actuator lever groove in
the wedge assembly.
c. The sides of the brake levers and shoes
that slide against each other.
2. Install both adjusting bolts.
3. Put the abutment pins in the adjusting
bolt bores.
4. Install the adjusting bolt spring clip with a
tubular drift. Figure 3.8.
5. Install shoe and lining assemblies on the
backing plate with the web pressure points
above the center line.
6. Put the straight ends of the shoe return
springs in the shoe webs. Install the round
ends in the backing plate slots.
7. Install the brake shoe levers with the pressure
points against the pressure points on the webs
of the shoes.
8. Put the actuator lever through the slot in the
back of the backing plate. Pull apart the shoe
and shoe lever assemblies to install the wedge
assembly.
9. Assemble the brake drum and drive shaft
using standard procedures.
Figure 3.8
TUBULAR
DRIFT
