CYLINDER A 0781141 - Caterpillar

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The grounding stud on the back of cab
Route the harnesses with existing harness wiring. Use 3S-2093 Cable Straps (3) to secure the new harnesses to existing harnesses.Note: Do not route the 220-5527 Harness (HVAC Cab) (51) through the opening in the firewall. Route the harness under the torque tube.Charging the Air Conditioner System
Use the procedure "Complete Charge of the System from a Refrigerant Tank with a Scale" to charge the air conditioner system. This procedure is part of the Testing and Adjusting, SENR5664, "Air Conditioning and Heating R-134a for All Caterpillar Machines"". This procedure can be obtained through the normal literature distribution system. This procedure can also be found on the Caterpillar Service Information System (SIS).Note: Charge the system with 0.68 kg (1.5 lb) of R-134a refrigerant.
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Installing the instruction plate (3) 3S-2093 Cable Strap (98) 223-9636 Instruction Plate
Install the 223-9636 Instruction Plate (98) on the suction inlet port of the compressor. Use the 3S-2093 Cable Strap (3) to tie the instruction plate on the compressor.Checking the Air Conditioner and Heater Installation
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(96) 162-5233 Film (Work Tool Control)
Install the 162-5233 Film (Work Tool Control) (96) on the left side of the air conditioner and heater. See Illustration 54.
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Position for installing fuse (29) for the air conditioner and heater
Install the 113-8492 Fuse (20 Amp) (29) in the indicated position in the fuse box. See Illustration 55.
Refill the cooling system.Refer to "Coolant Recommendations" and refer to "Cooling System Specifications" in the Operation and Maintenance Manual for your machine.
Start the engine. Run the engine without the radiator cap until the thermostat opens and the coolant level stabilizes. Maintain the coolant level in the sight gauge. The sight gauge is located on the right side of the radiator.
Stop the engine. Install the radiator cap.
Check the hoses and the fittings for leaks.
Start the engine.
Check the air conditioner and heater unit for proper operation.
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Temperature control knob
The temperature control knob adjusts the output temperature. See Illustration 56.
Turn the temperature control knob counterclockwise in order to decrease the temperature.
Turn the temperature control knob clockwise in order to increase the temperature.
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The A/C switch controls the air conditioner. See Illustration 57.
Press the front portion of the rocker switch in order to turn on the air conditioner.
Press the rear portion of the rocker switch in order to turn off the air conditioner.
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Fan speed switch
The fan speed switch controls the two-speed blower fan motor. See Illustration 58.
Press the rear portion of the rocker switch for low fan speed.
Press the front portion of the rocker switch for high fan speed.
Return the switch to the neutral position in order to turn off the fan.
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Adjustable louver
The louver directs the flow of air, as needed. See Illustration 59.
The louver can be rotated for 360°.
The louver can be adjusted from a closed position to an open position.
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Recirculating filter
To gain access to the air filter, loosen the two thumb screws and remove the grill panel. See Illustration 60.