D7R Track-Type Tractor Machine Systems Caterpillar

Removal Procedure

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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.

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.

1. Evacuate the refrigerant system.

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Illustration 1	g00590749

2. Remove cover (1) and the filter from the front of the cab.

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3. Carefully pull thermostat tube (3) out of the evaporator core. Move the thermostat tube out of the way. The thermostat tube must not get pinched. Also, the thermostat tube must not get damaged.

4. Remove bolts (2) with the washers. Remove plate (4) .

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5. Remove bolts (5) with the washers. Remove plate (6) .

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6. Disconnect hose assemblies (7) from the evaporator core.

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Illustration 5	g00590784

7. Remove bolts (9) from each end of evaporator core (8). Remove evaporator core (8) .

Installation Procedure

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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.

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Illustration 6	g00590784

1. Install evaporator core (8). Install bolts (9) to each end of the evaporator core.

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Illustration 7	g00590783

2. Connect hose assemblies (7) to the evaporator core.

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Illustration 8	g00590752

3. Install plate (6). Install bolts (5) with the washers.

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Illustration 9	g00590750

4. Install plate (4). Install bolts (2) with the washers.

5. Carefully, push thermostat tube (3) into the evaporator core. The thermostat tube must not get pinched. Also, the thermostat must not get damaged during installation.

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Illustration 10	g00590749

6. Install the filter and cover (1) on the front of the cab.

7. Fill the refrigerant system.

   Reference: In order to charge the refrigerant system, refer to Service Manual, SENR3334 and Service Manual, SENR5664.