Gast 0740 Series Oilless Vacuum Pumps and Comressors - Manual (Page 4)

Gast will NOT guarantee field-rebuilt product per-
formance. For performance guarantee, the product
must be returned to a Gast Authorized Service
Facility.
Service Kit contents vary. Most contain vanes, gaskets
and filter parts.
SERVICE KIT INSTALLATION
SHUTDOWN PROCEDURES
It is your responsibility to follow proper shutdown pro-
cedures to prevent product damage.
NEVER ADD OIL TO THIS OIL-LESS PUMP.
Do Not attempt to remove the rotor. It is held in
place by Loctite and can only be serviced by a Gast
Authorized Service Facility.
Do Not loosen or adjust motor thru-bolts to prevent
misalignment and damage to the pump.
4
It is your responsibility to:
• Regularly inspect and make necessary repairs to
product in order to maintain proper operation.
• Make sure that pressure and vacuum is released
from product before starting maintenance.
Flushing
Flushing this product to remove excessive dirt, foreign
particles, moisture or oil that occurs in the operating
environment will help to maintain proper vane perform-
ance. If your pump is not getting the vacuum or pres-
sure level expected, flushing is required. Vanes will
stick when dirty and may cause pump to be noisy or
inefficient.
Use only Gast recommended Solvent or other non-
petroleum based flushing solvent. Do Not use kerosene
or ANY other combustible solvent to flush product.
Check that all external accessories such as relief valves
and gauges are attached to cover and are not damaged
before re-operating product.
1. Disconnect electrical power supply.
2. Release all pressure and vacuum from pump.
3. Remove all accessories at the inlet and exhaust
ports.
4. Remove filter.
5. Start product. Place towel over exhaust port to
clean up solvent. If using liquid solvent, pour
several tablespoons directly into inlet port. If using
Gast recommended Flushing Solvent, spray solvent
for 5-10 seconds into inlet port.
6. Block the inlet port and draw a deep vacuum for
15-20 seconds. Release the vacuum.
7. Listen for changes in the sound of the motor. If
motor sounds smooth, go to next step. If motor
does not sound like it is running smoothly, repeat
steps 5 and 6 until you can hear a difference in the
operating sound of the pump.
8. Start the pump and let it run for 1 minute, then turn
pump off.
9. Replace all accessories at the inlet and exhaust
ports.
10. Replace filter before resuming operation.
Check intake and exhaust filters after first 500 hours of
operation. Clean filters and determine how frequently
filters should be checked during future operation. This
one procedure will help to assure the product’s perform-
ance and service life.
Clean filters when necessary by removing and washing
in a solvent or soap and water. After cleaning, dry with
compressed air to make sure all moisture is removed
before replacing filters.
Proper shutdown procedures must be followed to pre-
vent pump damage. Failure to do so may result in pre-
mature pump failure. The Gast Manufacturing Rotary
Vane Oil-Less Vacuum Pumps and Compressors are
constructed of ferrous metals or aluminum which are
subject to rust and corrosion when pumping condensa-
ble vapors such as water. Follow the steps below to
assure correct storage and shutdown between operating
periods
1. Disconnect plumbing.
2. Operate product for at least 5 minutes without
plumbing.
3. Run at maximum vacuum for 10-15 minutes.
4. Repeat step 2.
5. Disconnect power supply.
6. Plug open ports to prevent dirt or other
contaminants from entering product.