Crankcase Lubricant Selection; Oil Viscosity; Table 21 Oil Operating Temperature Vs. Sae Viscosity - GE H301 Series Operating Manual

Oil Change Frequency
Oil change frequency depends upon the operating conditions; determined as
follows:
• Change oil every 2,000 hours (three months) or as determined by oil analysis.
• Based on the oil analysis over a period of 6,000 hours or nine months, the oil
supplier should then be in a position to recommend an optimum frequency for
oil changes.
• Whenever the oil is completely drained, the inside and bottom of the
crankcase should be thoroughly cleaned and all sediment removed by
washing with cleaning solvent (safety Flash Point of 105°F (41°C) minimum)
or special gum solvent which when added to the oil in service will provide
cleaning.
• After washing, dry the frame with lint-free rags.
NEVER USE FLAMMABLE LIQUID TO FLUSH OUT THE

Crankcase lubricant Selection

GE does not recommend specific brand and type of lubricants. Most oil
manufacturers market oils with an additive package suitable for lubricating this
type of compressor. Contact the local oil supplier/expert for suitable lubricants.

oil Viscosity

Single viscosity SAE 40 (ISO 150) weight oil is required in the crankcase year
round, regardless of the ambient temperature when the compressor is started up.
Supplemental oil heating is recommended for oil temperatures below 40°F (4°C).
The oil viscosity must not exceed the pumping limit
(approximately 10,000 SSU) at starting temperature. A
machine operating at low ambient temperature (an unheated
building or outdoor installation) should have oil heaters in the
crankcase.
The minimum allowable oil viscosity of 20 cSt at 175°F (80°C) is required for the
roller needle type crosshead pin bearings used in H302 compressors.
Oil operating temperature °F (°C)
140°F - 170°F (60°C - 77°C)
Ta ble 19 Oil operating temperature vs. SAE viscosity
F L A M M A B L E
CRANKCASE.
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (5)
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
SAE viscosity number
40
H301/302 HSR Compressors | Rev. 2.2 | 73