Refrigerant Lines on Compressor, Removing and Installing

Refrigerant Lines On Compressor, Removing And Installing

NOTE:
- The compressor is always driven when the engine is running; there is no A/C clutch. The engine is therefore not to be started unless the refrigerant circuit has been properly assembled. If, for example, the refrigerant lines have not been connected to the compressor, heat generation inside the compressor with the engine running may lead to destruction of the compressor.
- The following illustrations show a compressor installed to the right of the engine. The refrigerant lines are to be removed in the same manner for compressors installed to the left of the engine. These engines are however not installed at present with a bracket for the refrigerant lines.
- Seal open lines and connections at compressor with suitable caps (to prevent dirt and moisture).
- On vehicles with 8-cyl. engine, certain preparatory work is required to make the refrigerant lines accessible for removing.

Removing
- Discharge refrigerant circuit Refrigerant R134a - Servicing.
- Remove noise insulation.
- Remove front bumper (not always necessary, depends on vehicle).
- Move lock carrier to service position.
- If applicable, remove charge air cooler/secondary air pump motor (not always necessary, depends on vehicle)







- Remove bolt - A - (only installed at present with compressor installed to right of engine).
- Remove bolts - B -.

Installing
Install in reverse order, paying attention to the following:
- Check type of seal at connections and refrigerant lines (must be designed for same type of seal).







- Replace O-rings - D - and - E -.
- Tighten bolts - B - to 25 Nm.
- Tighten bolt - A - to 25 Nm.







NOTE:
- Tighten bolts - B - and then secure clip - C- with bolt -A-.
- Use must not be made of O-rings from caps of replacement compressor connections.
- After attaching, check routing of refrigerant lines -A-. They must be inserted in brackets - B - provided and not make contact with other components.