Compressor, Removing and Installing

Compressor, Removing And Installing

Removing
- Discharge A/C refrigerant system
- Disconnect refrigerant lines from compressor
- Remove compressor from bracket

Installing
Installation is reverse of removal, noting the following:
Before installing compressor:
- Tightening torques and O-Ring-seals
- Only start engine after refrigerant circuit has been assembled.
- If a new compressor has been installed or fresh refrigerant oil has been filled into the compressor (e.g. after blowing through the A/C system), the compressor must be turned by hand approx. 10 revolutions. This ensures that the compressor will not be damaged when first activated.
- Only start engine with system recharged.

NOTE:
- The compressor is always driven by the belt pulley (no A/C clutch):
- The compressor is equipped with an "internal oil circuit", this prevents compressor damage in the event that the system is empty. A residual amount of refrigerant oil must be in the compressor as a requirement for internal lubrication.
- The engine should only be started when the refrigerant circuit is completely and properly installed. For example; if the refrigerant lines are not connected, when the engine is running the compressor may heat up (via internal heat generation) until the compressor becomes damaged.
- The A/C Compressor Regulator Valve -N280- is not activated when the system is empty, and the compressor runs at idle with the engine.
- The necessary oil to lubricate the compressor is not transferred, since no refrigerant is available.
- In order to avoid compressor damage, the compressor is lubricated by an "internal oil circuit".
- If it is necessary to start the engine with a discharged refrigerant circuit:
- The refrigerant circuit must be completely assembled.
- At least one quarter of designated refrigerant oil for this circuit must be in the compressor.
- Engine speed should not increase above 2500 RPM.
- The engine should only run as long as absolutely necessary
- Observe the following when starting the engine after recharging the refrigerant circuit:
- Start engine with compressor switched off ("ECON" mode) and wait until idle speed has stabilized.
- Open dash panel vents.
- Select "Lo" on A/C Control Head -E87-.
- Now switch on compressor ("AUTO" mode) and run for at least 5 minutes with the engine at idle.