D.Replacing Compressor

If the compressor is replaced due to internal damage (e.g. , seized or damaged valve plates, etc.), it is mandatory to replace components as outlined in the chart below.
NOTE: Flushing the A/C system is prohibited.

IMPORTANT: Do not replace refrigerant lines on systems with York compressors. Instead, install strainer (part no. 000 131 04 34) in the suction connection according to job no. 83.7-524/2.

Refill the system with the correct amount of refrigerant oil as specified in the applicable service microfiche. After replacing components, check suction and discharge pressures of the system (job no. 83-510).

In addition, check auxiliary fan function via:
- temperature switch (52~C) or
- the high pressure switch (20 bar) and via the coolant temperature switch (100~C). Be sure to check proper direction of rotation: (clockwise).

For engines 102 and 601, check function of electramagnetic fan clutch.

CAUTION! A defective expansion valve will lead to compressor failure because:

1. Liquid refrigerant could reach the compressor, resulting in fluid lock due to excessive suction pressure.

2. Overheating of the compressor could result due to insufficient suction pressure (possibly even a vacuum) if the expansion valve is clogged.