Troubleshooting Guide - Ingersoll-Rand QS511 Operation And Maintenance Manual

Trouble
Loss of Power
Motor won't run
Leaky Throttle Valve
Gear Case gets hot
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.

TROUBLESHOOTING GUIDE

Probable Cause
Low air pressure
Plugged Inlet Bushing Screen
Worn or broken Vanes
Worn or broken Cylinder
Exhaust control restricted
Motor Clamp Washer binding
Gears binding
Worn Throttle Valve and/or
Throttle Valve Seat
Dirt accumulation on Throttle
Valve and/or Throttle Valve Seat
Excessive grease
Worn or damaged parts
21
Solution
Check air supply. For top performance, the air
pressure must be 90 psig (6.2 bar/620 kPa) at the
inlet.
Clean the Inlet Bushing Screen using a clean,
suitable cleaning solution. If the Screen cannot be
cleaned, replace it.
Replace a complete set of Vanes.
Replace the Cylinder if it is cracked or if the bore
appears wavy or scored.
Make certain the Exhaust Diffuser is in the fully
open position.
Remove the Gear Case make certain the Washer is
flat and the Motor Seal is properly positioned.
Clean and inspect all gearing. Replace any worn or
damaged gearing.
Install a new Valve and/or Seat.
Clean or replace the Throttle Valve and/or Throttle
Valve Seat.
Clean and inspect Gear Case and gearing parts and
lubricate as instructed.
Clean and inspect the Gear Case and gearing.
Replace worn or broken components.