As far as the physical appearance and dimensions, the crankcase on the N54 is
the same as the N52. The main
change is in the materials, the N54 uses an all aluminum alloy crankcase. There
is also ca
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OIL USED IN FREON-CHARGED SYSTEMS
A mineral-based oil is used. The oil level in the compressor must be checked
before filling an air conditioner
with refrigerant. It can be checked only if the system is without refrigerant.
Always check the oil level each time a new system is filled with Freon R12
NOTE: Following repairs, the corrosion protection work already begins
with the correct
removal of the PVC undercoating, antinoise compound and seam seals.
1.0 Removing sealing materials:
IMPORTANT:
Do not burn off PVC material with a gas burner or similar or heat
to
temperatures above 180ºC.