Chevrolet Light Duty Truck 1973 Service Manual page 106

NO V O LT A G E A T
COMPRESSOR CO IL.
COMPRESSOR NOT EN G A G E D .
PROPER V O LT A G E
COMPRESSOR C O IL.
CLUTCH SLIPPIN G .
COMPRESSOR EN G A G E D
BUT NOT O P E R A T IO N A L .
B E L T SLIPPIN G .
HIGH TO RQ UE CO M PRESSOR.
COMPRESSOR
THRO W S O IL.
C O M P R E S S O R D I A G N O S I S
Retrace electrical circuit back to source of power loss.
C-K Models:
Check for defective discharge Pressure Switch by jumping switch connector terminals.
operates, check for low refrigerant charge.
Check fo r proper ground and
TO
good clean electrical contact
at term inals.
Check fo r proper air gap.
C orrect if necessary.
(.0 2 2 .0 5 7 )
Check and correct
belt tension.
R E F R IG E R A T IO N C H A R G E
IS D E P L E T E D .
(S E IZ E D )
SYS T EM HAS SOME
R E F R IG E R A N T .
L E A K S FR E O N .
Blow out seal cavity
w ith air hose and
leak test.
DOES NOT
L
Fig. 99-Compressor Diagnosis
(See wiring diagrams).
If compressor
If charge is satisfactory, switch is defective-replace.________
If coil is s till inoperative,
replace compressor coil.
If previous step does not
correct clu tch slippage,
repair compressor.
Add one pound
refrigerant.
Leak test com plete
Repair compressor.
system before Operate and leak
removing compressor.
test system.
Repair compressor.
Wipe o ff o il - O.K.