Ingersoll Rand — Disassembly of the Air Impact Wrench — 3/8'' Square Drive Anvil Assembly
Repair & overhaul
From a Ingersoll Rand service manual — check it applies to your exact model before use.
Before you start
- The Hammer Pins (61) are loose within the Hammer Frame (60) and will be able to fall from the mechanism when the Hammer Case is removed.
Procedure
- Clamp the handle of the Air Impact Wrench in a leather or copper-covered vise, square drive upward.
- Remove the four Hammer Case Capscrews (65).
- While tapping lightly on the end of the Anvil with a plastic hammer, lift off the Hammer Case (62).
- Grasp Hammer Frame and carefully lift off the entire impact mechanism, making certain not to drop the two Hammer Pins (61).
- If disassembly of the Impact Mechanism is not required, set the mechanism aside intact.
- Remove the Hammer Frame Washer (58) from the end of the Rotor (52) shaft. Remove the Air Impact Wrench from the vise.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Ingersoll Rand service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.