Thermostatic A N D / O R Blower S W Itches; Resistor; Fuse; Specifications - Chevrolet 1977 light duty truck Service Manual

IB -7 5
Fig. -Therm ostatic and Blower Switches
4. Remove blower motor and harness assembly
from case.
Installation
1. Reverse applicab le
procedure.
CAUTION: Use new "O " rings coated with
clean refrigeration oil when connecting lines.
A d d 3 oz. o f new refrigeration oil to a new
core.
Compressor
M ak e.............................................................................
T y p e ..................................................................
D isplacem ent..........................................................
Rotation........................................................................
Volts
Blower Motor
C-K Four Season . . 12.0
C-K-G Overhead,
G Floor and
Motor Home1
U n its.................. 12.0
Compressor Clutch Coil
Ohms (at 8 0 ° F ) ........................................................
Amps, (at 8 0 ° F ) ..................................... 3.33 @ 12 volts
System Capacities
Refrigerant 12
steps in the removal

SPECIFICATIONS

A IR C O N D I T I O N IN G
Frigidaire
6 Cylinder Axial
12.6 Cu. In.
Clockwise
Amps. RPM
(Cold) (Cold)
12.8 Max. 3400 Min.
13.7 Max. 3400 Min.
3.70
2. Reverse steps 1-8 o f the "Blower Evaporator
A ssembly" removal procedure.
3. Evacuate, charge and check the system.
T H E R M O S T A T IC A N D /O R BLOWER
SW ITCHES
Replacement
1. Remove the cover plate assembly from
evaporator case.
2. Remove two screws securing either switch to the
cover plate and remove appropriate switch (fig. IB-75).
3. Install replacement switch, reinstall cover plate
and reverse steps 1-8
Assembly" removal precedure.
NOTE: W hen installing thermostatic switch, be
sure to position sensing capillary as when unit was
removed.

RESISTOR

The blower motor resistor is located on the top of
the unit. The entire unit must be removed to replace the
resistor.

FUSE

This U nit does not incorporate an in-line fuse. The
lead wire is connected to the H eater W iring Harness and
operates off the 20 am p Heater Fuse.
C-K Four-Season System ................................
C-K-G Overhead S y s t e m s ........................5 lbs. 4 oz.
G Floor S ystem ...........................................3 lbs. 4 oz.
Motor Home Chassis U n i t ........................3 lbs. 4 oz.
Torque Specifications
Compressor Suction and Discharge
Connector B o l t ............................................. 25 ft. lbs.
Rear Hend to Shell Stud N u ts.......................... 23 ft. lbs.
Shaft Mounting N u t ..........................................
Compressor Mounting Bracket Bolts.............. 25 ft. lbs.
Front Bracket to Compressor B o lts ................20 ft. lbs.
Belt T ensio n........................................See Tune Up Chart
Fuses
Fuse Block—
C-K S y s t e m s .................................................. 25 Amp.
Motor Home Chassis Unit............................. 20 Amp.
In-Line—
C-K S y s t e m s .................................................. 25 Amp.
Motor Home Chassis U n i t ..................................
Circuit Breaker
G Model Systems.............................................45 Amp.
o f the "Blower-EVaporator
3 lbs.
20 ft. lbs.
None
the