0438273 JOHNSON CARBURETOR ASSY.

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 disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
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.
Illustration 1 g01248767
Open door (1) .
Illustration 2 g01248769
Remove bolt (2). Position hose assembly (3) out of the way.
Remove bolt (6). Position hose assembly (7) out of the way.
Remove bolts (4) .
Remove refrigerant condenser (5) .Installation Procedure
Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.
Illustration 3 g01248769
Position refrigerant condenser (5) .
Install bolts (4) .
Position hose assembly (7). Install bolt (6). Tighten bolt (6) to a torque of 10 2 N m (88 18 lb in).
Position hose assembly (3). Install bolt (2). Tighten bolt (2) to a torque of 10 2 N m (88 18 lb in).Note: Use the following method to charge the air conditioning system. First, collect the refrigerant. Evacuate the system, and charge the system with the correct amount of refrigerant. The correct charge of refrigerant is 2 kg (4.4 lb).
Evacuate the air conditioning system and charge the air conditioning system. Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134A Refrigerant"and Special Publication, NEDG5065, "Air Conditioning Tools". The publications will provide the proper procedure, equipment and tools in order to charge the air conditioning system in any Caterpillar machine.
Illustration 4 g01248767
Close door (1) .