BENDIX BA-921 COMPRESSOR-STD-CLOSED ROOM Data Layanan - Halaman 12
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BACK / RETOUR
COMPRESSOR TROUBLESHOOTING CHART (Continued)
SYMPTOMS
1. (Continued.)
2. Noisy compressor
operation.
12
CAUSE
F. Compressor runs loaded
an excessive amount of
time.
G. Excessive engine
crankcase pressure.
H. Excessive engine oil
pressure.
I. Faulty compressor.
A. Loose drive gear or
components.
B. Excessively worn drive
couplings or gears.
C. Compressor cylinder head
or discharge line
restrictions.
REMEDY
F. Vehicle system leakage should not exceed indus-
try 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.
G. Test for excessive engine crankcase pressure &
replace or repair ventilation components as
necessary. (An indication of crankcase pressure
is a loose or partially lifted dipstick.)
H. Check the engine oil pressure with a test gauge
and compare the reading to the engine specifica-
tions. Bendix does not recommend restricting the
compressor oil supply line because of the
possibility of plugging the restriction with oil
contaminants. Minimum oil supply line size is
3/16" I.D. tubing.
I. Replace or repair the compressor only after
making certain none of the preceding installation
defects exist.
A..Inspect the fit of the drive gear on the compres-
sor crankshaft. The gear or coupling must be
completely seated and the crankshaft nut must
be tight. If the compressor crankshaft surface is
damaged, it is an indication of loose drive
components. If damage to the compressor
crankshaft is detected, replace the compressor.
When installing the drive gear or pulley, torque
the crankshaft nut to the appropriate torque
specifications and use care when pressing drive
components onto the crankshaft.
Do not back off the crankshaft nut once it is
tightened to the proper torque.
Do not use impact wrenches to install the
crankshaft nut.
B. Inspect drive gear and couplings and engine for
excessive wear. Replace as necessary.
(Nonmetallic gears should be replaced when the
compressor is changed.)
C. Inspect the compressor discharge port and
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.