F. Compressor runs loaded an
Vehicle system leakage should not exceed
excessive amount of time
industry standards of 1 psi pressure drop
per minute without brakes applied, and 3
psi pressure drop per minute with brakes
applied. If leakage is excessive, check for
system leaks and repair.
ventilation components as necessary. (An
indication of crankcase pressure is a loose
or partially lifted dipstick.)
H. Excessive engine oil
Check the engine oil pressure with a test
gauge and compare the reading to the
engine specifications. Bendix does not
recommend restricting the compressor oil
supply line because of the possibility of
plugging the restriction with oil
is 1/4" O.D. tubing.
making certain none of the preceding
installation defects exist.
2. Noisy compressor operations
A. Loose drive gear or pulley
Inspect the fit of the drive gear on pulley on
the compressor crankshaft. The pulley on
gear must be completely seated and the
crankshaft nut must be tight. If the
compressor crankshaft surface or its keyway
are damaged, it is an indication of loose
drive components. If damage to the
compressor crankshaft is detected, replace
stalling the drive gear or pulley, torque the
crankshaft nut to 100 foot pounds.
DO NOT BACK OFF THE CRANKSHAFT
NUT TO ALIGN THE COTTER PIN AND
CASTELLATED NUT.(Some compressors
do not use castellated nuts.) DO NOT
USE IMPACT WRENCHES.
B. Excessively worn drive
for excessive wear. Replace as necessary.
(Non-metallic gears should be replaced
when the compressor is changed.)
C. Compressor cylinder head or
Inspect the compressor discharge port and
discharge line restrictions
discharge line for carbon build-up. If carbon
is detected, check for proper cooling to the
compressor. (See Cause and Remedy (D)
under Symptom #1.) Inspect the discharge
line for kinks and restrictions. Replace
discharge line as necessary.