Ingersoll Rand — Assembly of the Impactool

A Ingersoll Rand service procedure — check it applies to your exact model before use.

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Procedure

1. Set assembled hammer mechanism onto rotor shaft spline.
2. Place Hammer Case Gasket (34) over mechanism and against face of Motor Housing.
3. Grease Anvil and top of Hammer Frame.
4. Place Hammer Case (39) over mechanism assembly against Gasket.
5. Assemble Dead Handle (43) to Dead Handle Bracket (42). Insert two Hammer Case Cap Screws (41). Position assembly against Hammer Case and thread the Screws into Housing.
6. For 3940 and 3942 Series: Thread remaining two Cap Screws into Housing and using an alternating pattern for all four fasteners, tighten Screws between 20 and 25 ft-lb (27 and 34 Nm) torque. For 3955 Series: Thread remaining two Cap Screws into Housing and using an alternating pattern for all four fasteners, tighten Screws between 35 and 40 ft-lb (47 and 54 Nm) torque.
7. Install a new Exhaust Silencer (33) in Motor Housing Assembly (26) and install the Exhaust Deflector (32).

Source: manual:10569408ed2b.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.