TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
63.
REAR BRAKES DO NOT RELEASE.
WARNING
Safety goggles must be worn when working with air lines to prevent personal injury.
Chock wheels of dump truck (TM 5-3805-254-10).
NOTE
Check AIR PRESSURE gage for air pressure between 90 and 130 psi. If specified air pressure is
not present, start engine and check that air pressure in air system is between 90 and 130 psi (TM
5-3805-254-10). Shut down engine (TM 5-3805-254-10).
Step 1. Check parking brake hand valve (1) for air pressure as follows: pull handle out to apply parking
brakes, using 5/8-inch open-end wrench, loosen output hose fitting (2) six turns, push in handle
and listen for hissing noise.
a.If hissing noise is not heard, replace parking brake hand valve (1), notify Direct
Support Maintenance.
b.If hissing noise is heard, pull out handle to apply brakes. Tighten output hose fitting
(2) using 5/8-inch open-end wrench, and go to step 2.
TA243910
2-335
