D6R2 Track-Type Tractor Machine Systems Caterpillar

Removal Procedure

Start By:

1. Remove the hood.

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Personal injury can result from contact with refrigerant. Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury. Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant. Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area. 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. Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.

1. Recover the refrigerant. Refer to Service Manual, SENR5664, "All Products Air Conditioning and Heating R134a for All Caterpillar Machines" for the recovery and the charging procedure. Refer to Special Publication, NENG2500, "Air Conditioning Tools" for the correct tools.
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   Illustration 1	g03670570

2. Use Tooling (A) to crimp hoses (1). Disconnect hoses (1) and harness assembly (2).
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   Illustration 2	g03670073
   For reference only.

3. Disconnect hose assemblies (3).
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   Illustration 3	g03670567

4. Remove bolts (5) and plate (4).
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   Illustration 4	g03670579

5. Disconnect harness assemblies (6).
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   Illustration 5	g03670584
   For reference only.

6. Remove bolts (9) and nuts (7). Remove refrigerant evaporator core and heater core assembly (8).
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   Illustration 6	g03670629

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   Illustration 7	g03670630

7. Remove bolts (11) and tube assemblies (10).
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   Illustration 8	g03670631

8. Remove cable straps (14), bolts (13), and switch (12).
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   Illustration 9	g03820569

9. Remove bolts (16) and cover (15).
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   Illustration 10	g03414947

10. Disconnect harness assembly (17). Remove screws (19) and blower motor (18).

Installation Procedure

1. Install blower motor (18) in the reverse order of removal.

   1. Tighten bolts (16) to a torque of .7 ± 0.2 N·m (6 ± 2 lb in).

   2. Tighten bolts (11) to a torque of 2.5 ± 0.3 N·m (22 ± 3 lb in).