3116 Engine for Challenger 35, and Challenger 45 Agricultural Tractors and 3126 Engine for Challenger 55 Agricultural Tractor Engine Supplement Caterpillar

Removal Procedure

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Hot engine components can cause injury from burns. Before performing maintenance on the engine, allow the engine and the components to cool.

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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. Open the hood. Refer to Operation and Maintenance Manual, SEBU7204, "Engine Compartment Hood - Raise".

2. Recover the air conditioner refrigerant from the air conditioner system. Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigerant" for the correct procedure. Refer to Special Publication, NEDG5065, "Air Conditioning Tools" for the correct tools.

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Illustration 1	g00567098

3. Disconnect air conditioner hose (1) and (2) .

4. Remove two nuts (3), the two washers and the two bolts. Remove the clip and air conditioner dryer (5) from bracket (4) .

Installation Procedure

Note: Check the O-ring seals for wear or damage. Use new replacement parts, if necessary.

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Illustration 2	g00567098

1. Position the clip and air conditioner dryer (5) to bracket (4) .

2. Install the two bolts, the two washers and two nuts (3) .

3. Install the O-ring seals and connect air conditioner hose (1) and (2) .

4. Evacuate the air conditioner system. Charge the air conditioner system. The correct charge is 2.3 kg (5.07 lb). Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigerant" for the correct procedure. Refer to Special Publication, NEDG5065, "Air Conditioning Tools" for the correct tools.

5. Close the hood. Refer to Operation and Maintenance Manual, SEBU7204, "Engine Compartment Hood - Lower".