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Lubrication
Before operating
compressor, fill to the
center of the sight gauge (see Figure 5.1).
Using any other type of
oil may shorten pump
life and damage valves.
Recommended Oil
• Use full synthetic, non-detergent
air compressor oil.
Fill the pump with oil to the center of
the sight gauge using oil fill opening
(see Figure 5.1). Do NOT fill the pump
through the breather cap opening as
this may cause oil to leak and spray out
during operation.
BREATHER INSTALLATION
Remove cap from oil fill opening. Install
breather (found in parts bag with this
manual, See Figure 5.2).
If the compressor is run under humid conditions for short periods of time, 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.
NOTE: To avoid water condensation in the oil, periodically run the compressor with tank pressure near 120 PSI for
single stage compressors by opening the drain cock or 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.
Breather
Cap
Oil Drain
Extension
Full
Add Oil
Oil Sight Glass
Figure 5.1 - Models VT4823 and VT4923
Remove Cap
Install
Breather
Figure 5.2 - Models VT4823 and VT4923
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