446D Backhoe Loader Engine Supplement Caterpillar

Removal Procedure

Start By:

1. Remove the hood. Refer to Disassembly and Assembly, "Hood - Remove".

Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.

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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.

1. Recover the air conditioner refrigerant from the air conditioner system. The correct charge is 0.8 kg (1.8 lb). Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigerant" for the correct procedure.

2. Put identification marks on all hoses, on all tubes and on all wires for installation purposes. Plug all hoses and tubes. This helps prevent fluid loss, and this helps to keep contaminants from entering the system.

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Illustration 1	g01081917

3. Remove bolt (1) and position bracket (2) aside.

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Illustration 2	g01081919

4. Remove bolts (3). Remove grill (4) .

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Illustration 3	g01081922

5. Remove nut (5) .

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Illustration 4	g01081925

6. Remove bolt (6) and bar (7) .

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Illustration 5	g01081927

7. Remove bolt (9) which secures refrigerant condenser (8) .

8. Repeat Step 7 for the opposite side.

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Illustration 6	g01081928

9. Disconnect hose assembly (10). Remove bolt (12) and clip (11). Place hose assembly (10) aside. Disconnect tube assembly (13). Remove bolts (14). Remove refrigerant condenser (8) .

Installation Procedure

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Illustration 7	g01081927

1. Install refrigerant condenser (8) into position. Install bolt (9) which secures refrigerant condenser (8) .

2. Repeat Step 1 for the opposite side.

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Illustration 8	g01081928

3. Install bolts (14). Connect hose assembly (10). Install clip (11) into position. Secure clip (11) with bolt (12). Connect tube assembly (13) .

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Illustration 9	g01081925

4. Install bar (7). Secure bar (7) with bolt (6) .

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Illustration 10	g01081922

5. Install nut (5) .

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Illustration 11	g01081919

6. Install grill (4). Install bolts (3) .

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Illustration 12	g01081917

7. Install bracket (2) into position. Secure bracket (2) with bolt (1) .

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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.

8. Purge the air conditioning System. After a vacuum has been applied, charge the air conditioning system with refrigerant. The correct charge is 0.8 kg (1.8 lb). Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigerant" for the correct procedure.

End By: Install the hood. Refer to Disassembly and Assembly, "Hood - Install".