Heavy Duty Balanced Opposed Compressors
Heavy Duty Balanced Opposed Compressors
Heavy Duty Balanced Opposed Compressors
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FOR MODELS: JG AND JGA SECTION 4 - LUBRICATION AND VENTING<br />
Discharge<br />
Description & Adjustment<br />
Oil pump discharge pressure is held nearly constant by a spring loaded regulating valve<br />
within the pump head. Lube system pressure can be raised or lowered by adjusting this<br />
valve (see Figure 4-13:).<br />
Lube Oil Pressure<br />
NOTE: NORMAL PRESSURE ON THE DISCHARGE SIDE OF THE LUBE OIL FILTER IS<br />
SET AT THE FACTORY AT 60 PSI (414 kPa) WHEN CRANKSHAFT SPEED<br />
EQUALS OR EXCEEDS 750 RPM FOR THE JG AND 900 RPM FOR JGA. IF OIL<br />
PRESSURE DROPS BELOW 50 PSI (350 kPa), THE CAUSE MUST BE FOUND<br />
AND CORRECTED.<br />
Low Oil Pressure Shutdown<br />
Suction<br />
FIGURE 4-13: LUBE OIL PUMP - JG:A/4 & JGA/6<br />
Adjustment Bolt<br />
(Turn Clockwise to<br />
Increase Pressure)<br />
Locknut<br />
Cap Shown<br />
Removed<br />
The low oil pressure shutdown is normally mounted by the packager and is supplied to customer<br />
specifications. Ariel provides an oil pressure pickup fitting on the oil gallery located<br />
after the cooler and filter. The electric or pneumatic oil pressure switch is to be set to actuate<br />
when oil pressure falls below 35 PSIG (240 kPa).<br />
NOTE:<br />
1. THE COMPRESSOR MUST HAVE A WORKING LOW OIL PRESSURE SHUT-<br />
DOWN.<br />
PAGE 4 - 26 11/01
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