BRAKE SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
TEST OR INSPECTION
Check for restricted oil return line.
If oil return line is clear, go to Test 3.
Air Compressor Passes
Look for kinks, bends, and
Excessive Oil, Indicated by
restrictions in oil return line (WP
Oil Seeping from Air
Strainer - Continued.
Check for poorly filtered inlet air.
Check for dirty engine air filters.
If the problem still exists, go to Test 4.
Check for poor compressor cooling
If engine coolant temperature exceeds
200F (93C), refer to Cooling System
lines and fittings for scales, kinks,
Troubleshooting (WP 0007 00).
problem still exists, go to Test 5.
Check air system reservoir for build-
Drain reservoir (TM 5-3805-261-10). If
up of dirt and water.
the problem still exists, go to Test 6.
Check if air compressor runs loaded
Repair system leaks as necessary (WP
an excessive amount of time.
0318 00). If the problem still exists, go to
Measure air system leakage. Start
engine and let air pressure build up
and stabilize. Observe air pressure
gauge. System leakage should not
exceed 1 psi (7 kPa) pressure drop per
minute without brakes applied and 3
psi (21 kPa) pressure drop with
brakes applied. If leakage is
excessive, look for system leaks.
Check for loose end cover and
Tighten bolts to standard torques. Repair
cylinder block bolts.
or replace compressor after completing
steps 1 through 7 as necessary (WP 0317
Check fit of drive gear on crankshaft.
If drive gear is not installed correctly,
If crankshaft surface or its keyway
remove and install (WP 0317 00). If the
are damaged, it is an indication of
problem still exists, go to Test 2.
loose drive gear components.
Check for worn drive gear or pulley
If drive gear or pulley is worn, replace
on air compressor crankshaft.
(WP 0317 00). If the problem still exists,
go to Test 3.
Check cylinder head.
If carbon build-up is detected in cylinder
head, check for proper cooling of
still exists, go to Test 4.