14
LUBRICATION
Except for the motor bearings, which are grease lubricated, all bearings in the Model WSM-03
Centrifuge are oil lubricated. A direct driven gear pump, mounted along the outer base, circulates oil
through the gear unit and overflows to the outer external shaft bearings.
CSI has shipped the machines with Shell Omala E.P. ISO Grade 68 or Shell Omala HD synthetic E.P.
ISO Grade 220. All machines with a serial number higher than 09-207 have been shipped with Omala
HD synthetic E.P. ISO Grade 220. We recommend the use of these oils or their equivalents. The oil
should be changed every 1600 hours of operation or every three months, whichever occurs first.
Where operating conditions are severe, such as a rapid rise and fall in temperature of the bearing
housing, with accompanied sweating of the inside walls and resulting formation of sludge, or where
operation is in moist or dusty atmosphere, or in the presence of chemical fumes, it may be necessary
to change the oil at intervals of one to two months.
A positive displacement gear pump is used. The pump motor should be wired with the main drive
motor so that the main drive cannot be turned on without the oil pump operating.
A low-pressure cut-off switch is installed on the pressure line and is to be wired onto the control
circuit. This cuts off at 3 psi to shut down the machine. The switch is normally open and will not
close until 3-1/2 psi pressure is reached. A flow switch is also installed on the pressure line and is to
be wired into the control circuit. This cuts off at .10 G.P.M to shut down the machine.
OIL FILTER
A 10 Micron absolute cartridge is provided to insure proper lubrication filtration. Should the filter
cartridge become clogged or near so, excessive pressure will be indicated on the gauge. If, when the
machine is warm, 40 psi is indicated, the filter cartridge should be changed.
Note:
On initial start-up, the oil viscosity is high and may cause high pressure
readings until operating temperature is reached. Therefore, when
determining need for a filter cartridge change, be sure the lubricant is at
normal operating temperature.
