Gast NL52 - Manual (Page 4)

4
It is your responsibility to regularly inspect and make
necessary repairs to this product in order to maintain
proper 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 assure the motor’s performance
and service life.
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
performance. Flush the motor if it is operating slowly
or inefficiently.
Use only Gast recommended Flushing Solvent.
DO NOT use kerosene or ANY other combustible
solvents to flush this product.
1. Disconnect air line and muffler.
2. Add flushing solvent directly into motor. If using
liquid solvent, pour several tablespoons directly
into the intake port. If using spray solvent,
spray for 5-10 seconds into intake port.
3. Rotate the shaft by hand in both directions for a
few minutes.
4.
You must wear eye protection for this step.
Cover exhaust with a cloth and reconnect the air
line.
5. Restart the motor at a low pressure of
approximately 10 PSI / 0.7 bar until there is no
trace of solvent in the exhaust air.
6. Listen for changes in the sound of the motor.
If motor sounds smooth, you are finished.
If motor does not sound like it is running smoothly,
installing a service kit will be required
(See “Service Kit Installation”).
Check that all external accessories such as relief valves
or gauges are attached and are not damaged before
operating product.
4. Check the air compressor.
5. Listen for changes in the sound of the motor.
If motor sounds smooth, you are finished.
If motor does not sound like it running smoothly,
installing a service kit will be required
(See “Service Kit Installation”).
MAINTENANCE
Shutdown
It is your responsibility to follow proper shutdown
procedures to prevent product damage.
1.
Turn off air intake supply.
2. Disconnect air supply and vent all air lines.
3. Disconnect air lines.
4. Remove air motor from connecting machinery.
5. Remove the muffler.
6.
Wear eye protection. Keep away
from air stream. Use clean, dry air
to remove condensation from the inlet port of
the motor.
7. Plug or cap each port.
8. Coat output shaft with oil or grease.
9. Store motor in a dry environment.
Cleaning sound absorber
1.
Remove the sound absorber.
2. Clean the felt filter.
3.
You must wear eye protection for this step.
Gast will NOT guarantee field-rebuilt product
performance. For performance guarantee, the product
must be returned to a Gast Authorized Service Facility.
SERVICE KIT INSTALLATION
Service Kit contents vary. Most contain vanes, end cap
gasket, body gasket, bearings and a muffler element or
felt.
Major and Minor Rebuilds Tool kits which include a
more in-depth rebuild manual are available through your
Gast Distributor/Representative. These kits include the
tools required to remove and reassemble end plates,
bearings and shaft seals, and to set the proper end
clearance. The rebuild manual also includes step by
step instructions, including illustrations, to help achieve
a successful rebuild. Gast Manufacturing, Inc. highly
recommends using the air motor rebuild manual and
tool kit when attempting a minor or major rebuild to
your Gast air motor.
Minor Rebuild:
1.
Remove the end cap.
2. Remove dead end plate bolts.
3. Remove dead end plate. (Use factory issued tool,
do not use screwdriver to remove the end plate.)
4. Remove the dowel pins from the body and push
back into end plate until flush or just below the
machined surface of the end plate.
5. Remove vanes.
6. Clean parts. Check for scoring on the end plate
and rotor assembly. If scoring exists, send unit to
a Gast authorized service facility.
7. Install vanes. Angle cuts on vanes face to
center of rotor.
8. Place the proper end plate gasket on the end
plate. If the original is damaged, replace with a
new one supplied in the Service Kit.
9. Place the dead end plate on the body.
10. Press the bearing onto the shaft using a factory
supplied bearing pusher.
Injury Hazard
Disconnect air supply and vent all air lines.
Wear eye protection when flushing this product.
Air stream from product may contain solid or liquid
material that can result in eye or skin damage.
Flush this product in a well ventilated area.
DO NOT use kerosene or other combustible solvents
to flush this product.
Failure to follow these instructions can result in
burns, eye injury or other serious injury.