TM 5-3805-261-23-1
BRAKE SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0010 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
Check for worn bearings. Check oil
Replace bearings if worn (WP 0317 00).
4.
Noisy Compressor
pressure and temperature. Install
Repair or replace compressor after
Operations - Continued.
suitable oil pressure and temperature
completing steps 1 through 4 as necessary
gauges in oil supply line. Start
(WP 0317 00).
engine. Oil pressure should be 5 psi
(34 kPa) at idle and 15 psi (103 kPa)
at maximum engine RPM.
NOTE
5.
Excessive Buildup and
Recovery Time.
Compressor should build up air system from 85 to 100 psi (586 to
689 kPa) in 40 seconds with engine at maximum RPM.
1.
Check for dirty engine air filters.
Replace air filters as necessary (WP 0037
2.
Check for restricted air inlet line.
Remove restriction or replace air inlet line
if kinked (WP 0318 00). If the problem
still exists, go to Test 3.
3.
Check for carbon build-up or
1. If carbon build-up is found, replace
restriction in compressor discharge
discharge line (WP 0318 00).
line and discharge port.
2. If no carbon build-up is found, replace
compressor (WP 0317 00).
Check installation and operation of
If governor does not operate properly,
6.
Compressor Fails to
Unload.
governor.
replace (WP 0165 00).
1.
Check for damaged mounting gasket.
If mounting bolt torque is low, replace
7.
Compressor Leaks Oil.
Check mounting bolt torque.
mounting gasket and tighten bolts to
standard torque (WP 0318 00). If the
problem still exists, go to Test 2.
2.
Check for loose end cover and
If bolts are tightened correctly, go to Test
cylinder block bolts.
3 (WP 0318 00).
3.
Check for loose oil supply or return
Tighten as necessary (WP 0318 00). If the
line fittings.
problem still exists, go to Test 4.
4.
Check for cracked crankcase,
Replace compressor (WP 0318 00).
cylinder block, or end cover.
1. Test for excessive system leakage.
Repair system leaks as necessary (WP
8.
Compressor Constantly
Cycles.
still exists, go to Test 2.
2. Check operation of governor.
If governor does not operate properly,
replace (WP 0165 00).
1.
Check for air pressure at supply ports
If no air pressure, TM 5- 3805-261-10),
9.
Service Brakes Are Not
of control valve.
Engaging Correctly.
troubleshoot air compressor assembly. If
the problem still exists, go to Test 2.
