CONTROL AS-ELECTRICAL 9W0235 - Caterpillar

Removal Procedure
Start By:
Remove the seat. Refer to Disassembly and Assembly, "Seat - Remove and Install.".
Remove the storage box and covers. Refer to Disassembly and Assembly, "Storage Box and Covers (Cab) - Remove and Install.".
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: Recover the refrigerant before any lines are loosened or any bolts are loosened.
Recover the air conditioner refrigerant from the air conditioner system. Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigeran". Refer to Special Publication, NEDG5065, "Air Conditioning Tools".
Drain the coolant from the cooling system into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant (EIC) - Change".
Illustration 1 g01318753
Remove bolts (1).
Position bracket (2) out of the way.
Illustration 2 g01318841
Disconnect hose assemblies (3). Disconnect hoses (4).
Illustration 3 g01318771
Disconnect harness assemblies (5).
Illustration 4 g01318778
Remove bolts (6).
Remove duct (7).
Remove bolts (8).
Use two people in order to remove heating and air conditioning unit (9). The weight of heating and air conditioning unit (9) is approximately 31 kg (70 lb).