Ingersoll-Rand QA90 X 90 Maintenance Information Download Page 7

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EN-6

26. Check the free speed of the tool using a tachometer and 

following the instructions in the 

SPEED ADJUSTMENT

 

section of this manual.

Troubleshooting Guide

Related Documentation

For additional information refer to:
Air Drill Product Safety Information Manual Form 04580353.
Air Drill Product Information Manual Form 16572281.
Air Drill Parts List Manual Form 16572851.

Manuals can be downloaded from www.irtools.com

Troubleshooting Guide

Trouble

Probable Cause

Solution

Loss of Power

Low air pressure.

Check air supply. For top performance, the air pressure 
must be 90 psig (6.2 bar/620 kPa) at the inlet.

Plugged Inlet Bushing Screen.

Clean the Inlet Bushing Screen using a clean, suitable, 
cleaning solution. If the Screen cannot be cleaned, 
replace it.

Worn or broken Vanes.

Replace the 

complete

 set of Vanes.

Worn or broken Cylinder.

Replace the Cylinder if it is cracked or if the bore 
appears wavy or scored.

Exhaust control restricted.

Make certain the Exhaust Diffuser is in the fully open 
position.

Motor won’t run

Motor Clamp Washer binding.

Remove the Gear Case make certain the Washer is flat 
and the Motor Seal is properly positioned.

Gears binding.

Clean and inspect all gearing. Replace any worn or 
damaged gearing.

Leaky Throttle Valve Worn Throttle Valve and/or Throttle Valve Seat.

Install a new Valve and/or Seat.

Dirt accumulation on Throttle Valve and/or 
Throttle Valve Seat.

Clean or replace the Throttle Valve and/or Throttle 
Valve Seat.

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.

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