3
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 product’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 #AH255B Flushing Solvent. DO NOT
use kerosene or ANY other combustible solvents to
flush this product.
Lubrication
Use Gast #AD220 or a detergent SAE #10 automotive
engine oil for lubricating. Lubricating is necessary to
prevent rust on all moving parts. Excessive moisture in
the air line may cause rust or 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.
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 Gast #AH255B, spray
solvent 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 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.
Shutdown
It is your responsibility to follow proper shutdown
procedures to prevent product damage.
1.
Turn off air intake supply.
2.
Disconnect plumbing.
3.
Remove air motor from connected machinery.
4.
Wear eye protection. Keep away from air
stream.
Use clean, dry air to remove condensation.
5.
Lubricate motor with a small amount of oil in
chamber. Rotate shaft by hand several times.
6.
Plug or cap each port.
7.
Coat output shaft with oil or grease.
8.
Store motor in a dry environment.
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.
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.
Lubricated models only: Lightly oil and reinstall
vanes.
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.
11.
Tap dowel pins into body and install end plate
bolts. Tighten bolts to 75-100 in-lbs.
12.
Set end clearance as required by model:
1AM-4AM and NL22-NL52 models - use the
bearing taper from kit to lightly tap on inner race of
the dead end bearing to free up and center the
rotor in the body.
6AM-8AM models - lightly strike the drive end
shaft with a soft hammer to push the rotor away
from the drive end plate. The rotor must NOT rub
on either end plate.
13.
Reattach end cap.
14.
If the air motor is lubricated, apply a few drops
of Gast #AD220 lubricant into ports. Rotate shaft
by hand for a few rotations.
Major Rebuild:
1.
Remove the end cap.
2.
Remove dead end plate bolts.
Major and Minor Rebuilds
Tool kits which include a more in-depth rebuild
manual are available through your Gast distributor.
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.
