Gast 4AM (SS) - 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 motorʼs 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 Gast recommended Flushing Solvents.
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. Slowly apply pressure until there is no trace
of solvent in the exhaust air.
5. Listen for changes in the sound of the motor. If
motor runs smooth, you are finished. If the
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.
Lubrication
For applications requiring food grade lubrication, Gast
#AS117 food grade oil is available. Gast #AD220 or a
detergent SAE #10 automotive engine oil is
recommended for other applications. Lubricating is
necessary to prevent rapid wear of internal components
on lubricated models. Excessive moisture in air line
may cause ice to form in the muffler when air expands
as it passes through the motor. Install a moisture
separator in the air line and an after cooler between
compressor and air receiver to help prevent moisture
problems.
Manual Lubrication
Shut the air motor down and oil after every 8 hours of
operation. Add 10-20 drops of oil to the air motor intake
port.
Automatic Lubrication
Adjust inline oiler to feed 1 drop of oil per minute for
high speed or continuous duty usage. Do Not overfeed
oil or exhaust air may become contaminated.
MAINTENANCE
Operate the motor for approximately 2 hours at
the maximum desired load. Measure the
surface temperature of the motor on the body
opposite the pipe ports. The maximum surface
temperature listed on the motor is for normal
environmental and installation conditions. For most air
motors, the maximum surface temperature should not
exceed 203ºF/95ºC. Do not continue to operate the
motor if the measured surface temperature exceeds
temperature listed on the motor. If your measured
temperature does exceed listed value, consult with your
Gast Distributor/Representative for a recommendation.
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. Lubricate motor with a small amount of oil into the
intake port. Rotate shaft by hand several times to
distribute oil.
8. Plug or cap each port.
Use a pressure regulator and/or simple shut-off valve to
regulate the motorʼs speed and torque. This will provide
the required power and will conserve air. Open the air
supply valve to the motor. Set the pressure or flow rate
to the required speed or torque. Adjust the lubricator to
feed one drop of oil for every 50-75 CFM (1.5-2 M 3 per
minute) of air moving through motor. Check the oil level
daily.
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
eye injury or other serious injury.