Ingersoll Rand — Disassembly of the Impact Mechanism
Repair & overhaul
From a Ingersoll Rand service manual — check it applies to your exact model before use.
Before you start
- The twin hammers will be free to slide from the Hammer Frame when the Hammer Pins are removed. Do not drop the Hammers.
- If you continue to rotate the Anvil, it will cam the Hammers out of engagement. Do not allow this to happen.
Procedure
- Set mechanism, driver end up, on a workbench.
- Mark top hammer "T" and bottom hammer "B" with a felt-tipped pen, arrows pointing upward, both on the same end.
- Slowly rotate Anvil clockwise until it comes up solid; do not cam the Hammers out of engagement.
- Hold Hammer Frame firmly and gently lift Anvil, rotating it clockwise about 1/8 of a turn.
- With Anvil removed, lift out the two Hammer Pins.
- Remove the Hammers.
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.