Chevrolet Light Duty Truck 1973 Service Manual page 84

1A-58 HEATER A N D AIR C O N D IT IO N IN G
replaced or flushed, replace the full charge of
oil. If not, add no more fresh oil than was
drained in Step 6.
8. Charge up the compressor to cylinder or can
pressure and leak test the compressor seals prior to
installation of compressor.
9. Reinstall the compressor and evacuate the system
by following the Evacuating Procedure.
FOUR-SEASON SYSTEM-C-K MODELS
CONDENSER (Fig. 57)
Replacement
1. Disconnect battery ground cable.
2. Purge the system of refrigerant.
3. Remove the grille assembly.
4. Remove the radiator grille center support.
5. Remove the left grille support to upper fender
support (2) screws.
6. Disconnect the condenser inlet and outlet lines and
the outlet tube line at the right end of the
condenser. Cap or plug all open connections at
once.
7. Remove the condenser to radiator support screws.
8. Bend the left grille support outboard to gain
clearance for condenser removal.
9. Remove the condenser assembly by pulling it
forward and then lowering it from the vehicle.
Fig. 5 7 -Condenser Installation (C-K Models)
C O M P O N E N T PART REPLACEMENT
10. Introduce R-12 vapor at cylinder (room) tempera­
ture and pressure.
11. Leak test all fittings and connections and give
particular attention to a leak test at the compressor
shaft seal if compressor has not been leak tested on
the bench.
12. Complete system processing and charge system.
10. To install a new condenser, reverse Steps 1-9 above.
Add one fluid ounce of clean refrigeration oil to a
new condenser.
NOTE: Use new "O " rings, coated with clean
refrigeration oil, when connecting all refrig­
erant lines.
11. Evacuate, charge and check the system.
ACCUMULATOR
Replacement (Fig. 58)
1. Disconnect the battery ground cable and the
compressor clutch connector.
2. Purge the system of refrigerant.
Be sure system is completely
WARNING:
purged of refrigerant before completely
disconnecting refrigerant lines.
Fig. 58--Accumulator Installation (C-K Models)
LIGHT DUTY TRUCK SERVICE MANUAL