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OPERATING INSTRUCTIONS (CONTINUED)
9. On cold weather start-up, run unit unloaded for 10-20 minutes to warm up compressor and engine.
10. Some vibration is common for the first 2 to 3 hours of operation. This vibration will decrease after the belt and
pulley seat.
If the compressor is run under humid conditions for short periods of
time, the humidity will condense in the crankcase and cause the oil
to look creamy. Oil contaminated by condensed water will not provide
adequate lubrication and must be changed immediately. Using
contaminated oil will damage bearings, pistons, cylinders and rings
and is not covered under warranty. To avoid water condensation in the
oil, periodically run the compressor with tank pressure at 20 psi under
maximum pressure setting by opening the drain cock (see Figure 8)
or an air valve connected to the tank or hose. Run the pump for an
hour at a time at least once a week or more often if the condensation
reoccurs.
All lubricated compressor pumps discharge some condensed water and oil with the compressed air. Install appropriate
water/oil removal equipment and controls as necessary for the intended application.
All moving parts must be guarded.
Continuous Run Operation
Continuous run operation is designed for gasoline engine units to ensure the required air pressure is always
available and to eliminate the need for frequent starting. The engine and the pump continuously run to keep the
air tank at maximum operating pressure.
Idle Down/Unloading
This unit is equipped with idle down/unloading control. To check operation:
1. Close shut-off valve. See Figure 4.
2. Start compressor and allow pressure to reach proper limit of unloader (See Figure 7) which is set at 135 psi. At
this point, the compressor should unload through the breather bushing on unloader and the engine should idle
down.
3. Open shut-off valve and allow pressure in tank to drop to lower limit of unloader which is preset at 110 psi. At
this point the unloader should close allowing the compressor to begin loading the tank instead of discharging
through the breather bushing.
4. Do not alter pressure settings on unloader or governor setting on engine. If lower pressures are required this
should be accomplished with a separate pressure regulator after the outlet valve. Compressor has a maximum
operating pressure limit of 135 psi and should not be operated beyond this limit.
Crankcase Breather
During severe operating conditions or initial start-up, some oil may accumulate at the crankcase breather
opening. This is normal and will diminish as the pump accumulates run time and rings become fully seated.
Change oil after first 50 hours of operation.
Failure to install appropriate water/oil removal equipment may result in damage
to machinery or workpiece.
Figure 8 - Opening drain cock
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