GENERAL SPECIFICATIONS
| Item | Specification |
|---|---|
| Magnetic Clutch | |
| Air gap between pulley and clutch plate | 0.35-0.75 mm (0.014-0.030 in) |
| Refrigerant Lubricant | |
| PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C, USA) | WSH-M1C231-B |
| PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft CYN-12-C, Canada) | WSH-M1C231-B |
| O-Ring Lubricant | |
| Refrigerant Compressor Oil (Mineral Oil) F73Z-19577-AA (Motorcraft YN-9-A) | ESH-M2C31-A2 |
GENERAL SPECIFICATIONS
TORQUE SPECIFICATIONS
| Description | Nm |
|---|---|
| A/C compressor bolts | 25 |
| A/C compressor mounting bracket bolts | 25 |
| Generator mounting bracket bolts | 48 |
| A/C compressor manifold bolt | 21 |
| A/C compressor clutch disc and hub bolt | 13 |
| A/C (peanut) fitting nut | 8 |
| Compressor manifold and tube bracket bolt | 8 |
| Condenser-to-evaporator line bracket bolts | 8 |
| Evaporator outlet line bracket bolt | 8 |
TORQUE SPECIFICATIONS
The main A/C refrigerant system is a clutch cycling orifice tube type and the auxiliary A/C refrigerant system is a thermostatic expansion valve system. The system components are
- A/C compressor
- A/C condenser core
- A/C evaporator core
- suction accumulator
- connecting refrigerant lines
The refrigeration system operation is controlled by the
- evaporator core orifice tube
- A/C cycling switch
- A/C pressure transducer
- thermostatic expansion valve
The refrigerant system incorporates an A/C compressor controlled by the powertrain control module (PCM) through an A/C clutch relay.
The A/C cycling switch senses evaporator core pressure to control A/C compressor operation.
An evaporator core orifice tube is installed in the condenser to evaporator line to meter the liquid refrigerant into the evaporator core.
The A/C compressor clutch will only be engaged by the PCM if all of the following conditions are met
- The climate control assembly is set to a mode which provides an A/C request to the PCM.
- The A/C cycling switch is not open due to a lower than acceptable pressure on the low pressure side of the refrigerant system.
- The A/C pressure transducer is reading an acceptable pressure in the high side of the refrigerant system.
- The A/C compressor relay is switched to the closed position by the PCM.
- The engine coolant temperature is not excessively high.
- The PCM has not detected a wide open throttle (WOT) condition.
An A/C compressor pressure relief valve is installed in the compressor manifold and tube assembly to protect the refrigerant system against excessively high refrigerant pressures.
See also:
• GENERATOR AND REGULATOR