TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
When jacking vehicle, be sure vehicle is on level ground. Put blocks in front and behind each
wheel to prevent vehicle from moving, and support vehicle with trestle stands to prevent
personnel injury.
Step 6. Check front brakes for proper operation as follows: jack up one side of dump truck (page 2-424).
Spin wheel (4) and check for freedom of movement. Lower dump truck (page 2-424). Jack up
opposite side of dump truck (page 2-424). Spin wheel (4) and check for freedom of
movement. Lower dump truck (page 2-424).
If one or both wheels (4) do not spin, go to step 7.
Step 7. Check front brake limiting and quick release valve (5) for output air pressure as follows: using 7/8-
inch open-end wrench, loosen output hose fitting (6) six turns. Have assistant press down
brake pedal (7), and release. Listen for hissing noise.
a.If hissing noise is not heard, replace front brake limiting and quick release valve (5).
Notify Direct Support Maintenance.
b.If hissing noise is heard, tighten output hose fitting (6), using 7/8inch open-end
wrench. Go to step 8.
TA243922
2-349
