Ingersoll-Rand DAA40 Series, Maintenance Manual

Page: 14 / 15

2–14
MAINTENANCE SECTION
TROUBLESHOOTING GUIDE
Trouble Probable Cause Solution
Low power or low free speed Low air pressure at the inlet Check air supply. For top perfor-
mance, the air presure must be 90 psig
(6.2 bar/620 kPa) at the inlet.
Plugged Inlet Bushing Screen Clean the Inlet Bushing Screen in a
clean, suitable cleaning solution. If
the Screen cannot be cleaned, replace
it.
Clogged Muffler Clean the Muffler Elements in a clean,
suitable cleaning solution. If they
cannot be cleaned, replace them.
Worn or broken Vanes Install a complete set of new Vanes.
Worn or broken Cylinder Replace the Cylinder if it is cracked or
if the bore appears wavy or scored.
Improper lubrication or dirt buildup Clean and lubricate the motor unit
parts.
Incorrect gap in Shutoff Valve
Assembly Adjust the gap as explained in the
section ASSEMBLING THE
MOTOR TO THE HANDLE.
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 solution into the air inlet and
operate the tool for about 30 seconds.
Immediately, pour 3 cc of light oil
into the tool and operate the tool for
30 seconds to lubricate all the parts.
Tool fails to shut off Dirty Shutoff Valve Assembly Clean any dirt from the Shutoff Valve.
Bent stem on Shutoff Valve Straighten the stem of the Valve or
replace the Valve.
Valve out of adjustment Adjust the Valve to get the required
gap specified on Page 2–13.
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.