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Trouble
Low power or low free speed
Rough operation
Excessive runout
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.
MAINTENANCE SECTION
TROUBLESHOOTING GUIDE
Probable Cause
Insufficient air pressure
Insufficient lubrication
Clogged Muffler
Worn or broken Blades
Worn or broken Cylinder
Improper lubrication or dirt
buildup
Worn or broken Rear Rotor
Bearing or Front Rotor
Bearing
Loose Spindle Nut
Worn or damaged Spindle or
Spindle Nut
Worn or damaged Front Spindle
Bearing or Rear Spindle
Bearing
17
Solution
Check air line pressure at the Inlet of the Tool.
It must be 90 psig (6.2 bar/620 kPa).
Inject 0.5 to 1 cc of the recommended oil into
the Air Inlet.
Replace the Muffler.
Install a complete set of new Blades.
Replace the Cylinder.
Inject 3 cc of a clean, suitable cleaning solution into
the Inlet, operate the tool for 30 seconds
and immediately inject 0.5 to 1 cc of the
recommended oil into the Inlet and run the
Grinder long enough to coat the internal parts
with the oil.
Examine each bearing. Replace the Rear Rotor
Bearing if it is worn or broken. Replace the Rotor
Assembly if the front rotor bearing is
worn or broken.
Tighten the Spindle Nut until snug.
Replace the damaged component and retest.
Examine each Bearing. Replace any damaged
or worn Bearings.
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