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Pneumatic Impact Tool diagnostic

Shawn
  • Updated

Objective

This article describes the process to troubleshoot a pneumatic impact tool

 

Environment

Pneumatic tool is not performing properly; performance may have degraded over time; tool may be making unusual noises.

 

Procedure

Evaluate tool,  define symptoms, What is not functioning correctly?

    • Verify Air Supply
      • Connect the tool to an air supply - run at full speed, no load
      • Measure Dynamic Air Pressure to verify there is adequate air supply - 90 psi at the tool inlet while running.  See article/video link: FAQ - Dynamic Air Pressure
      • Verify that the 2146 series tool air gauge is in the "green"
      • Adjust the air supply as necessary.
    • Feel/Listen to the tool while running.  Note any excessive noise or vibration and its apparent source.
    • Check tool performance
      • Measure torque output on a Skidmore or equivalent.  Compare against published working range torque.  Determine if performance is in range.

Repair the tool based on evaluation

Problem/Trouble found Probable Causes Solution Warrantable?

Low Power

Low Torque output

 Dirty inlet bushing or air strainer and/or exhaust silencer material Using a suitable cleaning solution in a well ventilated area, clean inlet parts and exhaust silencer No
Worn or broken vanes replace complete vane set Maybe, if not due to improper lube or contamination
Worn or broken cylinder and/or scored end plates

Examine cylinder and replace if worn or broken or if bore is scored or wavy.

Replace end plates if they are scored.

Note: 2146 Series - it is recommended to replace the Cylinder Rotor Pressure Gauge Assembly 2146-A3 if motor is damaged.

 Maybe, if not due to improper lube or contamination
Dirty motor parts Disassemble the tools and clean in a suitable cleaning solution in a well ventilated area.  Reassemble and test No
Improper positioning of FWD/REV valve

Make certain valve is fully engaged to left or right.

Make certain that valve is properly timed in composite body tools.

Yes, unless caused by improper previous repair.

Motor will not run

"blows air"

 Incorrect assembly or damage of motor components (rotor, bearings, vanes, cylinder, spacers, etc.)

Disassemble motor, replace worn or broken parts

Note: 2146 Series - it is recommended to replace the Cylinder Rotor Pressure Gauge Assembly 2146-A3 if motor is damaged.

 Yes, unless caused by improper previous repair.
Insufficient lubrication of impact mechanism Remove hammer case and clean and lubricate mechanism No
Tool will not impact Broken or worn impact mechanism parts Remove hammer case and examine impact mechanism parts.  Replace any worn or broken parts.  Lubricate upon reassembly. Yes, unless caused by improper previous repair or abuse.
Impact mechanism assembled incorrectly Review assembly and correct as necessary.  Refer to the service information. Yes, unless caused by improper previous repair.

Notes

For more information on see the Maintenance Manual and Parts List Manual for the tool.  Most manuals can be found on the Ingersoll Rand product web page under the Documents tab.

 

For Additional Information and assistance:

Browse the Knowledge Base:  https://irtoolhelp.ingersollrand.com

Submit a Request for assistance

Technical/Warranty Support:  irtoolhelp@irco.com.

 

 

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