PAN 4H8589 - Caterpillar

Removal Procedure
Start By:
Remove the storage box. Refer to Disassembly and Assembly, "Storage Box and Covers (Cab) - Remove and Install" in this manual. Note: Before you begin the following procedure, swing the upper structure in order to gain access to the panel that is mounted beneath the cab. Removing the panel allows access to the hose connections on the heating and air conditioning unit.
Effective July 1, 1992 regulations prohibit the venting of any refrigerant into the atmosphere. Refer to Caterpillar publications Service Manuals, SENR3334, SENR5664, and NEDG5065 for the proper procedure, the proper equipment, and the proper tools needed in order to reclaim refrigerant from any Caterpillar equipment.
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: Reclaim the refrigerant before any lines are loosened or any bolts are loosened.
Reclaim the refrigerant in the air conditioning system.
Close the shutoff valves that are located on the water pump for the heater lines.
Illustration 1 g00514876
Remove bolts (1) and the washers. Remove plate assembly (2).
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Disconnect two air conditioner lines (3).
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Disconnect two heater lines (4). Note: Mark the heater lines for installation purposes.
Illustration 4 g00637154
Remove condensate tubes (5).
Illustration 5 g00632575
Disconnect electrical connectors (6). Note: Mark the electrical connectors for installation purposes.
Illustration 6 g00632579
Peel back two rubber gaskets (7). Remove bolt (9) and the washer. Remove upper air duct (8).
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Loosen hose clamp (10). Remove hose (12).
Loosen hose clamp (11). Remove air duct (13).
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Remove bolts (14) and the washers. Remove heating and air conditioning unit (15).