Air Conditioning and Heating R-12 All Caterpillar Machines – Air Conditioning And Heating Unit

Remove Air Conditioning And Heating Unit

start by:

a) remove liners

------ WARNING! ------

Always wear goggles when the air conditioning system is opened. This system is charged with Freon-12 (CCL2F2 Dichlorodifluoromethane) which is not toxic or flammable. But there is a reason for caution. When Freon-12 makes contact with a flame, lethal phosgene gas is made. INHALING FREON THROUGH A LIGHTED CIGARETTE CAN CAUSE VIOLENT ILLNESS. This system is under pressure at all times, engine running or not. HEAT MUST NEVER BE PUT ON A CHARGED SYSTEM.

--------WARNING!------

1. Release the Freon-12 from the system. See AIR CONDITIONING AND HEATING, Purging The System, Form No. SENR7454.

2. Loosen clamp (3) and remove hose (1) from each side of cab. Remove clear drain hose (2) from each side of air conditioning and heating unit.

3. Remove seven bolts (4) and lockwashers which fasten the air conditioning and heating unit to the top of the cab.

4. Loosen setscrews and remove heater temperature and air conditioning temperature control knobs (6). Remove ten bolts (5) and washers. Lower duct assembly (7). Put identification on wires connected to the air conditioning and heating unit control panel. Disconnect wires and remove the duct assembly.

5. Remove clear drain hose (10). Remove and put plugs in the refrigerant outlet and inlet lines (9). Remove and put a plug in heater hose (8).

6. Remove and plug heater hose (11). Loosen service screw (12) to lower the air conditioning and heating unit.

7. Remove two bolts (13), lockwashers, washers and spacers. Remove bracket (14) from air conditioning and heating unit.

8. Remove five bolts (16). Air conditioning and heating unit will hang in two brackets (15). Two persons must lift the air conditioning and heating unit off brackets (15) and out of cab. The weight of the air conditioning and heating unit is 90 lb. (41 kg).

Install Air Conditioning And Heating Unit

------ WARNING! ------

Always wear goggles when the air conditioning system is opened. This system is charged with Freon-12 (CCL2F2-Dichlorodifluoromethane) which is not toxic or flammable. But there is a reason for caution. When Freon-12 makes contact with a flame, lethal phosgene gas is made. INHALING FREON THROUGH A LIGHTED CIGARETTE CAN CAUSE VIOLENT ILLNESS. This system is under pressure at all times, engine running or not. HEAT MUST NEVER BE PUT ON A CHARGED SYSTEM.

--------WARNING!------

1. Two persons must be used to lift the air conditioning and heating unit into the cab and to hang the unit in two brackets (1). The weight of the air conditioning and heating unit is 90 lb. (41 kg). Install five bolts which fasten hinge (2) to cab.

2. Install bracket (4) and service screw (3) on air conditioning and heating unit with two bolts, lockwashers, washers and spacers.

3. Tighten service screw (3) to lift the air conditioning and heating unit into position.

4. Install refrigerant inlet and outlet lines (5). Install heater hose (6) on each side of air conditioning and heating unit. Install clear drain hose (4) on each side of unit.

5. Connect wires to air conditioning and heating unit control panel. Install duct assembly (7) with ten bolts and washers. Install the heater temperature and air conditioning temperature control knobs.

6. Install seven bolts which fasten air conditioning and heating unit to the top of the cab. Install two hose clips (8).

7. Install clear drain hose (10) on each side of the unit. Install hose (9) on each side of cab with a hose clamp.

end by:

a) install liners

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