8-44
Published 01-29-2014, Control # 496-00
UNDERCARRIAGE TMS800E SERVICE MANUAL
7. Re-engage the pull pawl by removing the screwdriver or
equivalent tool. The pull pawl will re-engage
automatically.
8. If the brakes have spring chambers, carefully release
the springs. Test before returning vehicle to service.
Measure Push Rod Travel or Adjusted Chamber
Stroke
Use the following procedure to check in-service push rod
travel or adjusted chamber stroke on vehicle brakes.
1. The engine must be off. If the brake has a spring
chamber, follow the procedure to release the spring.
Verify that no air pressure remains in the service section
of the chamber.
2. Verify that the pressure is 6.89 bar (100 psi) in the air
tanks. Determine the size and type of the brake
chambers on the vehicle.
3. With the brakes released, mark the push rod where it
exits the chamber. Measure and record the distance.
Have another person apply and hold the brakes on full
application Figure 8-64. Hold a ruler parallel to the push
rod and measure as carefully as possible. A
measurement error can affect CVSA (Commercial
Vehicle Safety Alliance) re-adjustment limits. CVSA
states that “any brake 6.4 mm (1/4 in) or more past the
readjustment limit, or any two brakes less than 6.4 mm
(1/4 in) beyond the re-adjustment limit, will be cause for
rejection.”
6600-11
FIGURE 8-63
Lengthen
Stroke
Shorten
Stroke
DIsengage
Pull Pawl
Reference Only
To Next Page
Loading...
Need help?
General
