27
Suitable oils for use in Hycomp compressors
include:
HYSYN synthetic compressor oil (8000 hr)
No direct replacements available
HYLUBE compressor oil (2000 hr)
Conoco Multipurpose R&O
Exxon/Mobil Rarus 427
Chevron Machine Oil R&O
Shell Turbo Oils T
valve located in the bearing carrier on the end of
the compressor opposite the flywheel. Pressure
is controlled by an adjusting screw and lock nut .
Adjustment must be made while the compressor is
running.
Increase in pressure is accomplished by a clockwise
rotation of the adjusting screw. Set the oil pressure to
18-22 PSIG (40-45 for F-blocks) with the compressor
at normal operating temperature.
Oil pressure regulation on ‘F’ block models built prior
to 1/1/09 is factory set. Adjustment on F-blocks built
prior to 2009 is accomplished by removing the bearing
carrier and changing the number of valve discs under
the oil pressure relief spring.
To increase pressure on F-blocks built prior to 2009,
adding more valve discs will increase pressure, while
removing valve discs will decrease pressure. Each
valve disc changes the oil pressure by approximately
2.5 PSIG. On F-blocks made after 1/1/09 the oil
pressure can be changed using the adjusting screw
(see fi gure 18). Set the oil pressure to 45 - 50 PSIG with
compressor at normal operating temperature. Each
valve disc changes the oil pressure by approximately
2.5 PSIG.
OIL PUMP DIRECTION OF
ROTATION
The oil pumps on ‘B’, ‘C’, ‘D’, ‘E’, ‘G’, ‘H’ and ‘V’ blocks
are reversible (‘F’ blocks are not reversible). To reverse
the operating direction of the oil pump, perform the
following steps:
1. Remove the hydraulic unloader, constant speed
unloader, control piping, oil pressure gauge, oil
fi lter, and oil pump housing bolts.
2. Rotate the pump 180 degrees (1/2 turn). The
rotational arrow at the top of the pump housing
should now point the same direction you wish
the pump to rotate.
3. Reinstall the oil pump housing bolts and torque
to 6 ft-lbs in a star pattern.
4. Remove the countersunk pipe plug from the
oil pump housing (underneath the oil filter)
and place it into the opposite hole. It should
now be in the bottom hole (Figure 18). Failure
to replace this plug in the proper position will
result in a complete loss of oil pressure to the
compressor, causing the compressor to seize
and the warranty to be void.
Quarts
7/8
1-1/2
2
6
7
10
7
Table 4: Oil Capacity by Block
Block
A
B
C
D, G
E, H
F
V
Figure 18: Oil Pump - ‘B’, ‘C’, ‘D’, ‘E’, ‘F’,
‘G’, ‘H’ and ‘V’ blocks
(including F blocks as of 1/1/09)
Oil Pressure
Adjusting
Screw
Countersunk Plug
F Block- as of 1/1/09
OIL PRESSURE REGULATION
Oil pressure regulation on ‘B’, ‘C’, ‘D’, ‘E’, ‘F’, ‘G’,
‘H’ (including ‘F’ blocks as of 1/1/09) and ‘V’ blocks
is accomplished by an adjustable, spring loaded
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