Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Compressor Assembly On-Vehicle Inspection




Compressor Assembly On-Vehicle Inspection

1) Install manifold gauge set (1) as shown in figure.
2) Close Hi (4) and Lo (5) side valves.











3) Run engine at fast idle.
4) Check compressor for the following items.

If defect is found, repair compressor.
- High pressure gauge reading is not low and low pressure gauge reading is not higher than normal.
- Metallic sound
- Leakage from compressor