MAINTENANCE SECTION
TROUBLESHOOTING GUIDE
Trouble
Probable Cause
Solution
Loss of Power
Low air pressure
Check air supply at the Inlet. For top performance,
the air pressure must be 90 psig (6.2 bar/620 kPa)
at the inlet.
Plugged Air Strainer Screen or
Inlet Screen
Clean the Air Strainer or Screen in a clean,
suitable, cleaning solution. If the Screen cannot be
cleaned, replace it.
Clogged Muffler or Exhaust
Silencer
Clean the Muffler Element in a clean, suitable,
cleaning solution. If it cannot be cleaned, replace
it.
Worn or broken Vanes
Replace a complete set of Vanes.
Damaged Rear End Plate Gasket
Install a new Rear End Plate Gasket.
Worn or broken Cylinder
Replace the Cylinder if it is cracked or if the bore
appears wavy or scored.
Improper lubrication or dirt
build–up
Clean the Motor Unit parts and lubricate them as
instructed.
Leaky Throttle Valve
Worn Throttle Valve and/or
Throttle Valve Seat
Install a new Throttle Valve and/or Throttle
Valve Seat.
Dirt accumulation on Throttle
Valve and/or Throttle Valve Seat
Pour about 3 cc of a clean, suitable, cleaning solu-
tion into the air inlet and operate the tool for about
30 seconds. Immediately, pour 3 cc of the recom-
mended oil into the air inlet and operate the tool
for 30 seconds to lubricate all the cleaned parts.
Gear Case gets hot
Excessive grease
Clean and inspect Gear Case and gearing parts and
lubricate as instructed.
Worn or damaged parts
Clean and inspect the Gear Case and Gearing.
Replace worn or broken components.
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.
