6 307277
Maintenance
Lubricating the Air Motor
CAUTION
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.
If the air motor is erratic or sluggish, clean the air
motor as follows
:
WARNING
Do not use kerosene or other flammable solvents
to flush the air motor. Flushing with flammable
solvents could cause fire or explosion and result in
serious injury or property damage.
WARNING
Hazardous fluids or toxic fumes can cause serious
injury or death if splashed in the eyes or on the
skin, swallowed, or inhaled. When flushing the air
motor:
D
Keep your face away from the exhaust port.
D
Wear the appropriate protective clothing,
gloves, eyewear, and respirator.
If the motor is sluggish or inefficient, flush it with
non-flammable solvent in a well ventilated area.
The recommended solvent for air motors and lubricated
pumps is Gast Flushing Solvent, Gast Part No. AH255
or AH255A, Loctite Safety Solvent, or Inhibisol Safety
Solvent.
1. Disconnect the air line and muffler.
2. Add several teaspoons of solvent directly into the
motor.
3. Rotate the shaft by hand in both directions for a few
turns.
4. Reconnect the air line and slowly apply pressure until
there is no trace of solvent in the exhaust air.
5. Re-lubricate the motor with a squirt of light-weight oil
in the chamber.
Service
If the unit requires more than installation of a service
kit, it is usually quickest and easiest to send the unit to
the nearest Graco distributor for repair or replacement.
NOTE:
If the vanes need replacing or foreign material
is present in the motor chamber, and experienced
mechanic 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.
Use a puller tool, which will remove the end plate while
maintaining the position of the shaft. New vanes should
have the edge with the corners cut at an angle or the
notched edge (if reversible) toward the bottom of the
vane slot.
NOTE:
If the air motor still does not operate properly,
contact a Graco distributor. Do not try to repair the air
motor yourself.
