Ingersoll Rand — FA2 Motor Disassembly
Repair & overhaul · FA2 air motor
From a Ingersoll Rand service manual — check it applies to your exact model before use.
Before you start
- Use extreme care when removing compression rings to avoid breakage
Procedure
- Remove capscrews, lockwashers and exhaust cover; pull out rotary valve and rotary valve bushing; remove adapter valve.
- Remove the capscrews, lockwashers and cylinders from the motor housing.
- Rotate the crankshaft assembly to bring each wrist pin above the motor housing, then push out the wrist pin and remove the piston.
- Do not remove the plugs pressed into the wrist pin ends; use extreme care removing compression rings.
- Pull the crankshaft assembly with connecting rods out of the motor housing.
- To remove connecting rods, take out setscrew and drive out the taper pin securing the counterbalance.
- Loosen the capscrew, remove counterbalance, then pull off connecting rod rings, connecting rods, bushing and sleeve.
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.