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Servicing
If the unit requires more than installation of a repair kit,
it is usually quicker and least expensive to send the
unit in for repair.
WARNING
To prevent explosive hazard do not drive this air
motor with combustible gases. Injury and/or proper-
ty damage can result.
Do not use kerosene or other combustible sol-
vents.
Eye protection is required.
Keep face away from exhaust port and do not flush
unit with flammable solvent.
Foreign material exiting the air motor can be haz-
ardous.
CAUTION
Do not drive the air motor in excess of the recom-
mended speeds.
Flushing
If the motor is sluggish or inefficient, try flushing with
solvent.
The recommended solvent for air motors and lubri-
cated pumps is Gast Flushing Solvent, Gast Part No.
AH255 or AH255A, Loctite Safety Solvent, or Inhibisol
Safety Solvent.
1. To flush a unit, disconnect the air line and muffler.
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Service
2. Add several teaspoons or spray solvent directly
into the motor.
3. Rotate the shaft by hand in both directions for a
few minutes.
4. Reconnect the air line and slowly apply pressure
until there is no trace of solvent in the exhaust air.
5. Flush the unit in a well ventilated area.
6. Re-lubricate the motor with a squirt of oil in the
chamber.
NOTE: If the vanes need replacing or foreign material
is present in the motor chamber, an experienced me-
chanic may remove the end plate opposite the drive
shaft end. Do not pry with a screwdriver. It will dent the
surface of the plate and body, causing leaks.
A puller tool should be used which will remove the end
plate while maintaining the position of the shaft. New
vanes should have the edge with the corners cut on
angle or the notched edge (if reversible) toward the
bottom of the vane slot.
NOTE: Do not try to repair the air motor yourself.
Contact a Graco distributor.
Lubricating the Air Motor
Not lubricating the air motor will cause air motor failure.
If an air line lubricator is not installed, the air motor
must be manually lubricated every 8 hours. Lubricate
the agitator air motor by placing 10–20 drops of SAE
#10 light oil in the motor's air inlet. Run the agitator for
about 30 seconds.
CAUTION
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