Ingersoll Rand — Assembly of the Reverse Valve

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

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Procedure

1. Inject a small amount of grease into hole in Motor Housing (26) where Reverse Lock Plunger (30) will be installed. With grease to hold them in position, install Reverse Lock Plunger Spring (31) and Lock Plunger.
2. Install a new Reverse Valve Bushing Seal (14) in annular groove on Reverse Valve (13).
3. Coat Reverse Valve with a light film of oil and install it in Motor Housing with the side hole nearest to Seal pointed toward Rotor (22).
4. Position Reverse Lever (12) on Reverse Valve and while using a thin blade screwdriver to depress Reverse Lock Plunger, push Lever onto Reverse Valve.
5. Place a new Handle Gasket (17) on the Motor Housing.
6. Examine Reverse Valve Seal (11) located inside Handle and if it is nicked, deformed or worn, remove it and install a new Seal.
7. Fill rotor cavity in Handle with recommended grease and position Handle on the Motor Housing.
8. For 3940 and 3942 Series: Install four Handle Cap Screws (15) and using an alternate tightening pattern, tighten Screws to between 10 and 12 ft-lb (14 and 16 Nm) torque. For 3955 Series: Install four Handle Cap Screws (15) and using an alternate tightening pattern, tighten Screws to between 25 and 28 ft-lb (34 and 38 Nm) torque.
9. Move Reverse Lever through the forward and reverse positions to make certain the Lever locks in position.
10. Turn assembly in vise jaws and clamp on Handle with rotor shaft upward.
11. Pack Front Rotor Bearing with additional grease and rotate rotor shaft. If shaft does not rotate smoothly, rap end of rotor shaft with a soft hammer to set motor and try to rotate shaft again.

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.