TM 9-2320-272-24-1
Table 2-4. Compressed Air and Brake System Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 10. Check service brake pedal primary air system delivery port (4) (front service brake
chambers test low or nonexistent air pressure).
WARNING
Do not depress service brake pedal during removal of plug
l
and/or installation of test gauge. Doing so may result in injury
to personnel.
Remove correct plug only. Removal of incorrect plug may result
l
in injury to personnel.
Step 1.
Remove plug (7) from service brake pedal primary air system delivery port (4) on brake
pedal valve (5).
Step 2.
Connect test gauge to delivery port (4). Direct assistant to start engine and allow air
pressure to build to normal operating pressure.
Step 3.
Depress service brake pedal (6).
Step 4.
Check test gauge.
a. If air test gauge reads normal, check delivery line (1) to doublecheck valve No. 1 (2)
for blockage. Clear blockage as necessary.
b. If air pressure is below normal or nonexistent, remove test gauge and replace service
brake pedal valve (5) (para. 3-197 or 3-198).
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