Table of Contents
Advertisement
Lubricated Rotary Vane Laboratory Vacuum Systems
6.2.4 Greasing the Motor Bearings
If greasing the motor becomes necessary, wipe
the fittings completely clean and use clean
equipment. More bearing failures are caused by
dirt introduced by greasing than from insufficient
grease. Be careful not to over-grease the motor.
If this occurs, the excess grease will spill out of
the motor and drip onto the vacuum pump.
Use good quality rust inhibited polyurea-based
grease, such as Chevron SRI. Motors that do not
have re-greasing capabilities (no grease fittings)
are factory lubricated for normal bearing life
6.3
Drip Leg and Filters
6.3.1 Exhaust Drip Leg Valve
Each pump should have a drip leg at the exhaust
port on the pump. This valve should be checked
daily at first, then depending on the moisture
accumulated, could be checked less frequently.
6.3.2 Inlet Filter
Each pump is equipped with an inlet filter. The
filter cartridge should be checked on a monthly
basis and cleaned as required. The filter cartridge
should be changed annually.
To clean the inlet filter, first close the inlet
isolation valve, then relieve vacuum by opening
the bleed valve located on the front of the filter.
Unsnap the lid clamps and lift off the filter lid.
Remove cartridge, being careful not to knock
any foreign particles present inside the canister
into the pump section. Clean foreign particles
from the canister with a clean rag, and carefully
back flush the filter cartridge with shop air. If the
filter cartridge has been subjected to moisture
or is extremely dirty, it may need replacement.
6.3.3 Exhaust Filter
Exhaust filters should be checked monthly.
4107 9021 88.01
A pressure gauge is supplied as part of the oil
fill plug. This gauge has a green field and a red
field. A pressure within the green field indicates
normal pressure. Any pressure in the red field
(for a continuous period of time) requires an
immediate change of the exhaust filter(s).
Annually, or as necessary, replace the exhaust
filter elements.
For 1.5 Hp, 2 Hp, 3 Hp and 5 Hp (RA0100)
NOTE:
Refer to Figure 6.2 for numbers referenced
below in parenthesis.
To replace the exhaust filters, unscrew the
screws (146) and lock washers (143) from the
exhaust cover plate (145). Remove cover plate
and gasket (141).
Use a slotted head screw driver to loosen the
exhaust filter retaining spring (125), then rotate
and remove the spring. Pull the filter cartridge
(120) out of the exhaust box.
Reinstall the filter elements. Make sure the open
end of the element is properly seated down in
its recess in the exhaust box with the O-ring
(121) correctly positioned. The indicating arrow
on each filter element must be pointing upward
toward the top of the exhaust box after the
assembly has been installed.
Retain the filter with the spring clip (125), tighten
the tension screw until the filter is secure.
Place the exhaust port gasket (141) and cover
(145) in position on the exhaust box and retain
with the cap screws (146) and lock washers (143).
6-4
Advertisement
Table of Contents
