Bendix Commercial Vehicle Systems EB/ES BRAKES SERVICE MANUAL - Manual (Page 16)

15
Brake Adjustment - Manual Brake Adjuster
NOTE: An assistant is required to make a brake adjustment.
WARNING: Block all wheels before beginning this adjustment
procedure.
To determine whether Bendix Brakes require adjustment, applied
stroke is measured and compared to the maximum value for the air
chamber size in use on the vehicle.
1. Perform “Brake Maintenance Preliminary Steps” described earlier.
2. With air chamber pushrod fully retracted, measure distance from
face of air chamber to centerline of clevis pin hole. Refer to Figure 8.
If the measurement is not within ranges shown in Table 2, reposition
clevis. Remeasure the distance and repeat until within range. Record
exact measured distance as dimension “A”.
Figure 8. Measurement, At Rest
!
Distance: Clevis Pin Hole
Centerline to Air Chamber Face
All brakes (except 2-5/8" ± 1/16"
Mack and Trailer Axle) (66.7 ± 1.59 mm)
4-3/8" ± 1/16"
(111.1 ± 1.59 mm)
Trailer Axle 6-1/2" ± 1/8"
brakes (165.1 ± 3.175 mm)
Mack brakes
Table 2. Distance Range
Due to the importance of a well-maintained brake system, the
inspections and maintenance listed below must be accomplished
by commercial vehicle operators at the intervals suggested.
Since driver technique and vehicle use affect the rate of brake
component wear, it may be appropriate to increase the frequency
of the following inspections to fi t individual needs based upon past
experience.
Brake Maintenance Preliminary Steps
Prior to performing any maintenance requiring removal of the tire
and wheel, the following preliminary steps must be taken to ensure
your safety. Refer to Figure 7.
Figure 7. Vehicle Maintenance Support
1. Set parking brake and block wheels to prevent vehicle
movement.
2. Raise drive axle with a jack and support on suitable stands.
WARNING: Never work under a vehicle supported by a jack.
3. Cage spring-type brake chamber following vehicle
manufacturer’s instructions.
!
Maintenance and Adjustment
Periodic Service
Parts Identi
fi cation