953C Track-Type Loader Machine Systems Caterpillar

Remove the Refrigerant Evaporator Coil

Start By:

1. Remove the seat.

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Personal injury can result from air conditioning system pressure. The air conditioning system will become a pressure system when charged. To avoid personal injury see the Air Conditioning and Heating Service Manual for instructions on charging the system. Personal injury or death can result from inhaling refrigerant through a lit cigarette. Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death. Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.

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Personal injury or death can result when charging an air conditioning system with a liquid. The compressor will pump the refrigerant back into the charging cylinder with the possibility of rupturing (exploding) the cylinder. Do not operate the engine when charging with a liquid. Never charge liquid or gas through the discharge (high side of the system) with the engine running. Keep all other personnel either away from the machine or where they can be seen when working on the air conditioning system.

Note: Mark all lines, hoses, wires and tubes for identification purposes. Cap all lines, hoses and tubes in order to prevent foreign material from entering the system.

1. Purge the air conditioning system.

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Illustration 1	g00470371

2. Remove seven screws and panel (1) behind the seat.

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Illustration 2	g00470372

3. Remove ten bolts, the ten washers and cover (2) .

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4. Disconnect wiring harness (3) and two wire connections (4) .

5. Remove the cotter pin (7) from the heater control valve.

6. Remove cable clamp (6) .

7. Remove three bolts (5), the three washers and cover (8) .

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Illustration 4	g00470956

8. Remove two bolts (9), the two washers and bracket (10). Repeat for the other side.

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Illustration 5	g00470957

9. Remove four bolts (11) and the four washers.

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10. Disconnect air conditioning lines (12) and (13) .

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11. Remove housing assembly (14) .

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12. Remove eight bolts, the eight washers and cover (15) .

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Illustration 9	g00470968

13. Close the water valves at the engine. Loosen hose clamps (16) and (17) .

14. Remove the blower and evaporator coil assembly.

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Illustration 10	g00470969

15. Remove air conditioning lines (12) and (13) .

16. Remove two bolts (18) and evaporator coil (19) .