Chevrolet 70 1969 Series, Руководство по ремонту

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C A B A N D BODY M O U N T IN G S 1-79
figure 17— Hose and Clamp Properly Installed
with a solvent to remove any excess oil. Cleaning
compressor in this manner will prevent any oil
from being thrown onto the clutch surfaces which
would cause slippage and eventual clutch failure.
1. Stamp refrigerant charge of the refrigerant
system on new compressor in space on plate pro­
vided for this information.
N O T E : Follow procedure for replacing oil in
new compressor explained previously under "R e ­
moving Malfunctioning Compressor and Installing
New Compressor."
2. Install new compressor to engine, leaving
compressor fittings opening cover plate on the
compressor.
3. Remove cover plate over compressor open­
ings very slowly to bleed off pressure.
C A U T IO N : New compressors are
charged with a mixture of nitrogen and
Refrigerant-12 and 11 fluid ozs. of
Frigidaire- 525 viscosity oil. If the
cover is removed too rapidly, the oil
will be blown out violently with the
sudden release of pressure.
4. Install coil and clutch parts if not already
installed.
5. Evacuate, charge and make a test of sys­
tem as explained previously under "Performance
Testing."
SERVICING LEAKING SEALS
AN D HOSES
When refrigeration system components other
than the compressor are replaced, the compressor
must also be removed and oil drained from the com­
pressor if oil was sprayed in copious amounts due
to severe leaks or broken lines. D O N O T add any
more oil than is necessary or maximum cooling will
be reduced. See "Checking Compressor Oil Level
and Adding Oil" previously.
1. Replace leaking seal, hose, or line. See
figure 17 for proper positioning of hose and hose
clamp.
N O T E : The initial clamp screw torque is 25
to 32 inch-pounds. After short period of time,
torque may drop off as low as 10 inch-pounds.
Final torque the clamp screw to 20 - 25 inch-
pounds.
2. Evacuate, charge and make performance
test.
CONDENSER ASSEMBLY
REPLACEMENT
N O T E : When refrigeration system components
other than the compressor are replaced, compres­
sor must also be removed and oil drained from
compressor if oil was sprayed in copious amounts.
See "Checking Compressor Oil Level and Adding
Oil" explained previously.
1. Depressurize the refrigeration system.
2. Remove radiator grille.
3. Remove compressor discharge hose clamp
at condenser inlet.
4. Remove hose from condenser inlet. Plug
openings.
5. Disconnect hex nut connection at condenser
outlet, then plug openings.
6. Remove four condenser assembly retaining
bolts and remove condenser.
7. Replace by reversing the above procedures,
using a new rubber O-ring seal well lubricated with
clean compressor oil at line connection.
8. Evacuate and charge system.
9. Make a performance test.
RECEIVER-DEHYDRATOR ASSEMBLY
REPLACEMENT
N O T E : When refrigeration system components
other than compressor are replaced, the compres­
sor must also be removed and oil drained from
compressor if oil was sprayed in copious amounts
due to leaks or collision damage to receivei>de-
hydrator. See "Checking Compressor Oil Level
and Adding Oil" explained previously.
1. Depressurize the system.
2. Disconnect inlet and outlet connections of
receiver at receiver-dehydrator assembly and plug
openings.
3. Loosen the receiver-dehydrator assembly
clamp screws and remove assembly.
4. Replace the receiver-dehydrator assembly
by reversing the previous procedures, using new
rubber O-ring seal, well lubricated with clean com ­
pressor oil, at line connection.
5. Evacuate complete system.
6. Charge complete system.
7. Make performance test.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L