6
LIQUID COOLED MODELS
Liquid cooled models have a water jacket built into the cylinder to cool the pump. The
coolant inlet is in the cylinder housing near the base and there are two coolant return
ports, one on either side of the valve housing above the cylinder.
A temperature gauge kit is supplied with liquid cooled pumps and should be installed at
or near the coolant return port to accurately register pump temperature. If the pump is
connected to the cooling system of a truck engine, the gauges of the truck and the pump
should show similar temperatures.
NOTE!
If the two temperature gauges show significantly different
temperatures, coolant is not flowing properly to the pump. Check
for proper installation and possible obstruction of the coolant
hoses.
PUMP LUBRICATION
Rotary Vane Vacuum Pumps require a high quality non-detergent Rotary Compressor
Oil or Rotary Turbine Oil. Oil specifically formulated for Masport pumps is available from
your local Masport representative or by contacting Masport Inc. It can be ordered in one
gallon jugs or six gallon cases and is available in both summer and winter grades.
NOTE!
NEVER use automotive motor oil, it can break down and leave
deposits in the pump that will affect pump life or performance.
Other oils and fluids that should never be used in Masport vacuum pumps are:
USED OIL
TRANSMISSION FLUID
POWER STEERING FLUID
BRAKE FLUID
HYDRAULIC FLUID
GEAR OIL
VEGETABLE OIL