ENGINE AR 8N1489 - Caterpillar

Removal Procedure
Start By:
Remove the storage box and covers.
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.
Note: Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.
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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Remove cover (1).
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Remove bolt (2) and disconnect hose assemblies (3). Disconnect hose assemblies (4).
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Disconnect harness assemblies (6). Reposition support assembly (5) and harness assemblies (6) out of the way.
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Disconnect harness assemblies (7) and (8). Remove bolts (9).
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Remove ducts (10), (12), and (13). Remove duct (14).
Remove heating and air conditioning unit (11).Installation Procedure
Install heating and air conditioning unit (11) in the reverse order of removal.
Tighten bolts (9) to a torque of 22 2 N m (195 18 lb in).
Tighten bolt (2) to a torque of 10 2 N m (89 18 lb in).