Meritor Automobile Accessories MM-9902 Manuel D’Utilisation

➀

Chamber exceeds   Incorrect initial   Check the chamber stroke If the air chamber still

two-inch maximum

adjustment or   after 20 brake overstrokes, replace the

stroke requirement

inoperative automatic applications.   caliper/saddle assembly. 

adjuster   Refer to Sections 3 and 4.

➁ 

Brake drag   Incorrect lining-to-   Minimum stroke Replace the caliper/saddle

rotor clearance   7/8-inch (22 mm)   assembly.

Incorrect initial   Adjust the rotor to pad

adjustment   clearance. Refer to Section 4.
Vehicle brake release

Correct operation of the

Repair or replace parts as 

pressure malfunction

quick release valve   required.

➂

Short outboard Caliper seized or   Damaged slide-pin seals   Replace the caliper/saddle

brake pad lining life sticking on slide pins   assembly.

Caliper should move 

back and forth by hand 

with linings removed

➃

Short lining life   Refer to conditions 

➁

Refer to conditions 

➁  

Refer to conditions 

➁

and 

➂

and 

➂

.   and 

➂

.

Rotor surface Cracks or heavy heat   Refer to Section 5 for disc

checking.  Refer to   inspection.

Section 5.

➄

Brake smoking   High brake   Refer to conditions 

➁

, 

➂

Refer to conditions 

➁

, 

➂

temperature   and 

➃

.   and 

➃

.

Grease, oil, etc., on Grease, oil, etc., on the   Check for oil leaks in the 

the linings   linings   brake area. Repair as  

required. Clean the rotor  

and caliper assembly. 

Replace the linings. 

Refer to Sections 3 and 4.

➅

Poor stopping Vehicle brake release

Correct operation of the

Have the system evaluated

power   pressure malfunction

quick-release valve   by a qualified brake system

specialist.

•

• Long stopping   Brakes out of   Stroke exceeds   Refer to condition 

➀

.

distances   adjustment   two-inch requirement

•

• Poor driver feel

Vehicle overload   Refer to the GAWR  Observe the vehicle

•

• Lack of normal limitations on the vehicle manufacturer's load

response   I.D. plate.   recommendations.

Lining contamination

Grease, oil, etc., on the Inspect for oil leaks in the 

linings   brake area. Repair as 

required. Clean the rotor and 

caliper assembly. Replace the 

linings. Refer to Sections 3 

and 4.

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