REFRIGERANT AND REFRIGERANT OIL CAPACITIES
Refrigerant R134a and refrigerant oil capacities, refer to Specifications .
Evacuating and charging refrigerant circuit, refer to EVACUATING REFRIGERANT CIRCUIT and CHARGING REFRIGERANT CIRCUIT
Operate the A/C system after filling the refrigerant circuit, refer to A/C SYSTEM, OPERATING AFTER FILLING REFRIGERANT CIRCUIT .
Note. Different capacities for refrigerant R134a and refrigerant oil are designated, depending on refrigerant circuit design (with one or two heating & A/C units / evaporators). Refer to Specifications . Compressor as replacement part has different refrigerant oil capacities, therefore note the exact part number, refer to Specifications . The reason for the different refrigerant oil capacities in the compressor lies in the design of the compressor itself, note these refrigerant oil capacities. Too much oil in the circuit leads to higher pressures and reduces cooling performance of the system. Too little refrigerant oil may lead to lubrication problems in the compressor. When charging the A/C system, always use maximum amount of refrigerant R134a, as some of the refrigerant remains in the hose of the refrigerant recovery, recycling and recharging unit. Only add approved refrigerant oils to the refrigerant circuit. Different refrigerant oils are required for A/C compressors made by Denso, Sanden and Zexel/Valeo. Refer to Specifications Use only the specified oil from a sealed container and always reseal oil container immediately after use (PAG oil absorbs moisture). Do not use oil if it is contaminated with moisture or if oil container has been left open. Additional information, refer to Specifications .
FASTENER TIGHTENING SPECIFICATIONS
| Component | Fastener Size | Nm |
|---|---|---|
| Auxiliary Heater Ground Connection | 9 | |
| Compressor Belt Pulley Drive Plate, Diesel | 35 | |
| Compressor Bolts | 25 | |
| Compressor Driveshaft | 60 | |
| Compressor Drive Plate Hex Socket Head Bolt | 10 | |
| Compressor Drive Plate | 30 | |
| Drive Plate Retaining Screw, V6 Gasoline | 20 | |
| Fluid Reservoir | 10 | |
| Front Expansion Valve | 10 | |
| High Pressure Relief Valve | 10 | |
| High Pressure Sensor | 5 | |
| Oil Drain Plug | 30 | |
| Rear Expansion Valve | 10 | |
| Rear Fresh Air Blower Control Module | 10 | |
| Rear Refrigerant Lines to Retaining Plate | 10 | |
| Rear Refrigerant Line Retaining Plate to Body | 10 | |
| Refrigerant Lines to Compressor | 20 | |
| Refrigerant Lines to Condenser | 20 | |
| Refrigerant Lines to Front Expansion Valve | 10 | |
| Refrigerant Line Connection Points | M6 | 10 |
| M8 | 20 | |
| Refrigerant Temperature Sensor | 8 |
COMPRESSOR INPUT SHAFT, LOOSENING AND TIGHTENING
Note. Extensive preparations are necessary in order to be able to loosen the compressor driveshaft, refer to COMPRESSOR . Driveshaft can also be checked and tightened without opening the refrigerant circuit, refer to COMPRESSOR .
Input Shaft, Loosening
Remove the components which prevent access to driveshaft, refer to COMPRESSOR .
Hold compressor driveshaft -A- in place using an open-end wrench and turn compressor drive unit -B- in direction of arrow -C-.
Note. Do not turn the driveshaft -A-. Input shaft -A- can be slid into drive wheel through the boot -E- after loosening threaded connection. After installing driveshaft -A-, check installation position of boot -E-.
Input Shaft, Tightening
Hold compressor driveshaft -A- in place using an open-end wrench and turn compressor drive unit -B- in direction of arrow -D- (tightening torque 60 Nm).
After tightening compressor driveshaft, check installation position of boot -E-.