Section 6: Assembly And Installation; Assembly - Meritor MM-2075 Maintenance Manual

Assembly and Installation
Hazard Alert Messages
Read and observe all hazard alert messages in this publication.
WARNING
To prevent eye injury, always wear eye protection when performing
vehicle maintenance or service.
CAUTION
When using compressed air, use air lines that are completely
free of oil and moisture. All brake parts must be clean and
completely dried of cleaning fluid. Use only Meritor replacement
parts to ensure correct caliper performance.

Assembly

Brake Caliper
1. Ensure the parts are clean and free of debris. Use compressed
air to clean out and dry the grooves and passages.
2. Inspect the crossover tube, the tube nut and the tube flares
for damage prior to installation. Replace the crossover tube if
any component appears damaged.
3. Assemble the crossover tube. Tighten the crossover tube nuts.
Refer to Section 11 Specifications on page 26.
4. Dip new piston seals in new, clean OEM-approved brake fluid
and install into the piston seal groove in the caliper piston
bores. Verify that they are correctly seated.
5. Apply a thin film of silicone grease or brake fluid to the caliper
bore seal land between the piston boot and seal groove. Apply
the grease or brake fluid around the entire circumference of
the caliper bore. Figure 6.1.
CALIPER
BORE
Figure 6.1
6. Apply OEM-approved brake fluid to the piston bore, seal and
piston OD to aid in piston installation.
7. Install a new seal into the seal groove.
(16579)
Printed in USA
8.
Figure 6.2
9.
Figure 6.3
10. Install the piston boot over the projecting end of the piston.
PISTON
BOOT
4003797c
Figure 6.4
11. Apply force to the steel case of the piston boot. A bearing cup
Copyright Meritor, Inc., 2023
6 Assembly and Installation
Align the piston to the bore for installation. The piston is a
tight clearance fit and must be square to the bore during this
operation to avoid binding. Figure 6.2.
CALIPER PISTON
Press the pistons into the bores one at a time. Use a block
and c-clamp to press the piston into the housing until lightly
seated. Repeat this procedure for the other pistons.
Figure 6.3.
Figure 6.4.
that fits the diameter of the steel is suitable installation tool.
Figure 6.5.
4003798b
4003799a
4003800b
MM-2075 / Revised 09-23
Page 13