Evaporator Core - Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual

1B-50 AIR CONDITIO NING
Fig. 1 B-54--Heater D is trib u to r Duct
b. If the motor mounting flange sealer has hardened,
or is not intact, remove the old sealer and apply a new bead
of sealer to the entire circumference of the mounting flange.
c. Check blower operations: blower wheel should rotate
freely with no interference.

EVAPORATOR CORE

Replacement (Fig. 1B-54)
1. Disconnect battery ground cable.
2. Purge system of refrigerant.
3. Remove coolant recovery tank and bracket as
outlined earlier.
4. Disconnect all electrical connectors from core case
assembly.
5. Remove bracket at evaporator case.
6. Remove right hand marker lamp for access.
LIG H T T R U C K S ER V ICE M ANUAL
Fig. 1 B -55--D istributor Gasket
7. Remove screws attaching thermostatic switch to case
and remove cappliary tube insulation.
8. Remove thermal bulb to inlet line clamp and remove
thermostatic switch.
9. Disconnect accumulator inlet and outlet lines and
2 brackets attaching accumulator to case.
10. Disconnect evaporator inlet line.
11. Remove three (3) nuts and one (1) screw attaching
module to dash panel.
12. Remove core case assembly from vehicle.
13. Remove screws and separate case sections.
14. Remove evaporator core.
15. To install new core, reverse steps 3 thru 14 above.
16. Add 3 oz. 525 viscosity refrigeration oil to a new
condenser.
17. Evacuate charge and check the system.