HOSE AS 3156781 - Caterpillar

Removal Procedure
Start By:
Remove the hood. Refer to Disassembly and Assembly, "Hood and Exhaust Ejector - Remove and Install".
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.
Effective July 1, 1992 regulations prohibit the venting of any refrigerant into the atmosphere. Refer to Caterpillar publications Service Manuals, SENR3334, SENR5665, or NEDG5065 for the proper procedure, the proper equipment, and the proper tools needed in order to reclaim refrigerant from any Caterpillar equipment.
Note: Cleanliness is an important factor. Before you begin the removal procedure, the exterior of the components should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.Note: Mark all components for correct installation. When you remove the components, cap the hoses and cover the ports in order to keep the system clean.
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 air filter (1) and the cover (not shown).
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Remove bolts (2) and thermostat (3) .
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Remove bolts (4) and plate (5) .
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Disconnect hose assemblies (6) from the cores.
Loosen bolts (7) (one on each side of the evaporator).
Remove evaporator core (8) and heater core (9) from the machine.Installation Procedure
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Install heater core (9) and evaporator core (8) to the machine.
Install bolts (7) (one on each side of the evaporator).
Connect hose assemblies (6) to the cores.
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Install plate (5) and bolts (4) .
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Install thermostat (3) and bolts (2) .
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Install the cover (not shown) and air filter (1) .
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.End By: Install the hood. Refer to Disassembly and Assembly, "Hood and Exhaust Ejector - Remove and Install".