Condenser; Receiver-Dehydrator; Sight Glass; Blower-Evaporator Assembly - Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual

Fig. 1 B-79--Condenser (M otor Home Chasis Unit)
procedures on some components.

CONDENSER

Replacement (Fig. 1B-79)
1. Disconnect the battery ground cable.
2. Purge the system of refrigerant.
3. Disconnect the condenser inlet and outlet lines and
cap or plug all open connections at once.
4. Remove the condenser to radiator support screws
and remove the condenser.
5. To install a new condenser, reverse Steps 1-4 above.
Add one fouid ounce of clean refrigeration oil to a new
condenser.
Use new
NOTICE:
refrigeration oil, when connecting all refrigerant lines.
6. Evacuate, charge and check the system.

RECEIVER-DEHYDRATOR

Replacement (Fig. 1 B-80)
1. Disconnect the battery ground cable.
2. Purge the system of refrigerant.
3. Disconnect the inlet and outlet lines at the receiver-
dehydrator and cap or plug the open lines at once.
4. Remove the receiver-dehydrator bracket attaching
screws and remove the bracket and receiver-dehydrator.
5. To install a new receiver-dehydrator, reverse Steps
1-4 above. Add one fluid ounce of clean refrigeration oil to
a new receiver-dehydrator.
NOTICE: Use new "O" rings, coated with clean
refrigeration oil, when connecting all refrigerant lines.
6. Evacuate, charge and check the system.
©
&
rings, coated with clean
"O"
AIR CONDITIONING
SIGHT GLASS REPLACEMENT
If damage to the sight glass should occur, a new sight
glass kit should be intalled. The kit contains the sight glass,
seal and retainer. (See Figure
1 . Purge system.
2. Remove the sight glass retainer nut using a
screwdriver and remove old glass and "O" ring seal.
Install the new' glass and seal and retainer nut, being
3.
careful not to turn the nut past the face of the housing. To
do so may damage the "O" ring seal.
4. Evacuate, charge and check the system.
BLOWER-EVAPORATOR ASSEMBLY (Fig. IB-
82)
Removal
1 . Disconnect battery ground cable.
2. Purge system of refrigerant.
Disconnect inlet and outlet refrigerant lines from the
3.
back of unit. Cap or plug all open connections at once.
4. Disconnect drain tubes from evaporator case.
5. Disconnect electrical connector from compressor.
Remove the terminal (See Figure
connector to hang on ground wire.
6. Remove screws securing grommet retainer to dash
panel. Remove wire from grommet through slit.
7. Disconnect electrical lead at connector.
8. Remove unit mounting bolts. Remove unit from
vehicle, carefully pulling compressor electrical lead through
dash panel.
Once the unit has been removed from the vehicle,
continue with component replacement as follows:
1 B-59
IB-81).
and allow
IB -8 3 )
I IGHT TRUCK SER V IC E MANUAL