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All Masport HXL pumps are equipped with automatic gear-driven oil pumps that are
preset at the factory and require no adjustment or maintenance.
OIL RESERVOIR MOUNTING
The oil reservoir tank must be mounted
higher than the oil feed connection on the
oil pump so that oil will be fed by gravity to
the oil pump.
PRIOR TO START-UP
Before running the pump for the first time (and any time after pump teardown or if it has
been out of service for some time) bleed the oil feed line from the reservoir and prime
the oil pump.
Pour 1 to 2 oz. (30 to 60 ml) of pump oil into the vacuum pump inlet and rotate the pump
BY HAND several times to coat the cylinder with a fresh film of oil. After start-up,
observe the transparent oil lines coming from the oil pump to confirm that oil is flowing
from the oil pump to the cylinder ports.
BLEED THE OIL PUMP
Make sure there is adequate pump oil in the
reservoir. Loosen but do not remove the bleed
screw on the oil pump. When oil starts to drip
from the bleed screw, retighten it.
VACUUM RELIEF VALVE
NOTE!
The Vacuum Relief Valve is not set at the factory
.
A working vacuum of 22" Hg at sea level is recommended for optimum pump life and
performance. Working vacuum level should be decreased by 1" Hg for every 1000 ft of
elevation. The vacuum relief valve setting should be verified using a quality liquid filled
vacuum gauge.