G 10 1/2 Ton Van V8-305 5.0L VIN H 4-bbl (1984)
4.
Disconnect all electrical connections to the A/C evaporator case assembly.
5.
Remove right front marker lamp.
6.
Remove accumulator inlet and outlet lines and accumulator tank from vehicle.
7.
Remove heater hose bracket.
8.
Disconnect the plastic water line from the water valve.
9.
Remove fasteners securing A/C evaporator case assembly and mounting hardware (three nuts and one screw). Remove case assembly from
vehicle.
10.
Remove evaporator core retaining screws and separate evaporator and blower inlet case sections.
11.
Remove evaporator core, blower motor and case assembly, relay, and resistors from case.
12.
Install former front A/C system blower speed control resistor in new case, P/N 3054954, and torque retaining screws to 1.2-1.6 N-m (11-14
in.lbs.). This will provide increased rigidity to prevent cracking the new case when removing knockout plug in Step 13.
13.
Carefully punch the A/C system blower speed control resistor knockout plug out of the new case. All pieces of this plug must be removed
from the opening. (See Figure No.2).
14.
Install new rear A/C system blower speed control resistor, P/N 15591188, in the new case. Torque the two resistor retaining screws to 1.2-1.6
N-m (11-14 in.lbs.). Discard old resistor.
15.
Reinstall the evaporator core, blower motor and cage assembly, and relay on the new case.
16.
Assemble A/C evaporator case assembly halves using rope sealant, P/N 3008851 or equivalent, applied to the sealing surfaces of new case.
17.
Reinstall the A/C evaporator case assembly on the vehicle following the procedure in reverse. Reseal the case flange to the dash panel using
rope sealant, P/N 3008851 or equivalent.
18.
Evacuate and recharge the A/C system. Refer to the 1984 Light Duty Truck Service Manual (ST-330-84) for instructions.
PROCEDURE C - DIESEL ENGINE EQUIPPED TRUCKS WITH DAMAGE TO A/C EVAPORATOR INLET CASE
1.
Disconnect the negative battery cable.
2.
Discharge the air conditioning system. Refer to the 1984 Light Duty Truck Service Manual (ST-330-84) for instructions.
CAUTION: To help avoid personal injury always wear goggles and wrap a clean cloth around fittings, valves and connections when doing work that
involves opening the refrigerant system. Always work in a well ventilated area and do not weld or steam clean near any of the air
conditioning components.
If refrigerant should come in contact with any part of the body, flush the exposed area with cold water and immediately seek medical
attention.
3.
Remove auxiliary radiator overflow reservoir.
4.
Remove right front marker lamp.
5.
Remove blower motor insulation.
6.
Disconnect all electrical connections to the A/C evaporator case assembly and remove relay.
7.
Disconnect accumulator inlet and outlet lines and move accumulator tank out of the way.
Notice:
When removing A/C components, make sure that the component is capped to prevent contamination.
8.
Remove the two resistors from the housing.
9.
Remove the evaporator core insulation.
10.
Remove fasteners securing A/C evaporator case assembly and mounting hardware (three nuts and two screws). Remove case assembly from
vehicle.
