Hitachi FSG Series Service Manual page 120

2
SERVICING
6
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WARNING: TURN OFF all power source switches
6. Remove the heater cover and the spring for the oil heater,
and release the oil heater.
7. Disconnect the discharge pipe of the compressor.
Use two spanners when disassembling the flare-nuts.
8. Remove the flare-nut at the compressor side, and
disconnect the oil piping.
There is a possibility that the oil may flow from the inside of
the oil pipe. Therefore, prepare an oil pan, etc. to collect
the oil.
Notes:
1 Completely wipe off the oil if the oil is spread to the
other parts such as the compressor cover, wiring,
bottom base, etc. If not, this will cause many problems
to the unit.
2 If the oil is spilt, charge new oil equivalent to the spilt oil.
3 Check to ensure that the oil is not foul. If foul, replace it
with new one.
9. Remove the suction pipe of the compressor.
Remove the spring
by expanding the
spring as shown
Heater Cover
Discharge Pipe
Two Spanners
Oil Pipe
Suction Pipe
Spring
Oil Heater
Oil Separator
Oil Pan