3
OPERATION
Solid or liquid material exiting the unit can cause eye or
skin damage. Keep away from air stream.
m
WARNING
Some models are equipped with glass jars.
Proper measure should be taken to guard
against the fragmenting or breaking of glass
if an alternative material is not used. If
hazard is ignored, severe personal injury
or death can occur.
m
WARNING
Always disconnect the power before
servicing. The motor may be thermally
protected and will restart automatically
when it cools if the thermal protection
switch is tripped.
m
WARNING
Pump surfaces can become very hot
during operation. Do not touch these
surfaces until unit has been shut off and
allowed to cool.
m
CAUTION
Do not operate units above
recommended pressures or vacuum
duties. To do so will damage the unit.
Starting
m
WARNING
Some models may exceed 85 dB(A) at
some operating duties. When in close
proximity to these models, hearing
protection is required. See Technical
Data Sheet (if provided) for your specific
model.
If the pump is extremely cold, let it warm up to room
temperature before starting. If the pump does not operate
properly, see the troubleshooting guide (pg.1).
INSPECTION AND MAINTENANCE
Regular inspection can prevent unnecessary damage and
repairs. The internal intake and exhaust filters require
periodic inspection and replacement. Initial inspection is
suggested at 500 hours, then the user should determine
the frequency. Most problems can be prevented by
keeping filters clean. Dirty filters decrease pump
performance and can diminish pump service life.
Filter Inspection/Replacement
m
WARNING
The unit may become very hot during
operation. Do not touch until the pump
has been turned off and allowed to cool.
Refer to exploded view drawings during the following
procedure.
Make sure the pump is turned off, isolated from the
power supply, and that all pressure and/or vacuum is
released from the pump.
Check filters periodically and clean when necessary by
removing felts and washing in Gast flushing solvent (Part
No. AH255B). Dry with compressed air and replace.
Before putting the pump back into service, ensure that
any external accessories such as relief valves and gauges
attached to the cover have not been damaged.
Flushing
Should excessive dirt, foreign particles, moisture or oil be
permitted to enter the pump, the vanes may stick or
break. Flushing the pump should take care of this
condition. Recommended solvent is Gast Flushing
Solvent AH255B.
m
CAUTION
Use eye protection and flush in a well
ventilated area.
m
CAUTION
Do not use petroleum-base compounds,
acids, caustics, or chlorinated solvents to
clean or lubricate any parts. It will reduce
the service life of the pump. Use only
water-base solvents for cleaning.
To flush, remove filter and spray or slowly pour several
teaspoons of solvent into the pump through the intake
while the pump is running. Repeat the flushing procedure
if necessary. Remove the end plate for further inspection.
SHUT-DOWN PROCEDURES
Proper shut-down procedures must be followed to prevent
pump damage. Failure to do so may result in premature
pump failure. The Gast Manufacturing Rotary Vane Non-
Lubricated vacuum pumps and compressors are con-
structed of ferrous metals or aluminum which are subject
to rust and corrosion when pumping condensable vapors
such as water. Follow the steps below to assure correct
storage and shut-down between use:
1. NEVER oil this non-lubricated pump.
2. After using the pump, disconnect plumbing and allow
the pump to run “open” for at least 5 minutes before
shut-down.
3. Be sure to plug any open ports so dirt and other
contaminants do not enter the unit. Pump is now
ready for shut-down or storage.
SERVICE KIT INSTALLATION
NOTE:
Gast will not guarantee the performance of a
field rebuilt pump. You can return the pump to
a Gast authorized service facility, or perform
the following rebuild procedures.
Each service kit contains most or all of the following:
bearings, vanes, gaskets, and filter elements. Follow
these general steps to install the kit:
Pump Disassembly
1. Disconnect the pump from electrical power.
m
WARNING
You must disconnect the pump from
electrical power before you service it.
Failure to do so can result in severe
personal injury or death.
2. Vent all air lines to the pump to remove pressure.
m
WARNING
You must vent all air lines to the pump to
remove pressure before servicing it.
Failure to do so can result in severe
personal injury.
