Craftsman 20930 Operator's Manual page 5

THE PUMP
3) The pump can also be used as a pressure pump
by removing the safety cap and connecting to the
pressure fitting. When the pump handle is released
from the closed position, pressure is created.
Additional pressure can be applied by manually
pushing in the piston pump rod.
CAUTION: Always be sure the safety cap is in place
unless the pressure fitting is being used. Other
sections of this manual outline specific uses for
the pump.
PROPER CARE
Your pump is a sturdily built, precision test
instrument. Do handle it carefully!
Don't drop or handle roughly as the gauge accuracy
may be affected. Care for your pump and it will
give you years of trouble-free service.
LUBRICATION
The factory-installed lubricant is silicone oil and
should provide very long service. If you find it
necessary to lubricate your pump, use silicone oil.
If unavailable, you may use DOT 5 (not DOT 3)
silicone-based brake fluid or a salad vegetable oil.
Do not use petroleum based fluids or spray
lubricants (WD-40, motor oil, etc.), as these will
damage the pump.
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