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Always wear eye protection when operating or performing maintenance on this tool. Always turn off the air supply and disconnect the air supply
hose before installing, removing or adjusting any accessory on this tool, or before performing any maintenance on this tool. Failure to do so
could result in injury.
Lubrication
Each time a Series 2902 Air Impact Wrench is disassembled for
maintenance and repair or replacement of parts, lubricate tool as follows:
1.
Work approximately 8 cc of Ingersoll-Rand Air Impact Wrench
Grease No. 105 into the impact mechanism. Coat the Anvil (66, 69,
72 or 79) lightly with grease. Also, coat the inside of the Hammer
Disassembly
General Instructions
1.
Do not disassemble the tool any further than necessary to replace or
repair damaged parts.
2.
When grasping a tool or part in a vise, always use leather-covered or
copper-covered vise jaws to protect the surface of the part or tool and
help prevent distortion. This is particularly true of threaded members
and housings.
3.
Do not remove any part which is a press fit in or on a subassembly
unless the removal of that part is necessary for repairs or
replacement.
4.
Do not disassemble the tool unless you have a complete set of new
gaskets and O-rings for replacement.
Disassembly of the Air Impact Wrench
For the 3/8'' Square Drive Anvil Assembly (69)
1.
Clamp the handle of the Air Impact Wrench in a leather or copper-
covered vise, square drive upward.
2.
Remove the four Hammer Case Capscrews (65).
3.
While tapping lightly on the end of the Anvil with a plastic hammer, lift
off the Hammer Case (62).
NOTICE
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.
4.
Grasp Hammer Frame and carefully lift off the entire impact
mechanism, making certain not to drop the two Hammer Pins.
5.
If disassembly of the Impact Mechanism is not required, set the
mechanism aside intact.
6.
Remove the Hammer Frame Washer (58) from the end of the Rotor
(52) shaft. Remove the Air Impact Wrench from the vise.
For the 1/4'' Quick-Change Anvil Assembly
1.
Clamp the handle of the Air Impact Wrench in a leather or copper-
covered vise, square drive upward.
2.
Remove the four Hammer Case Cap Screws (65).
3.
Remove the Retaining Sleeve Stop (78).
NOTICE
The Retaining Ball (76) will fall free when the Retaining Sleeve (77) is
removed.
4.
Remove the Retaining Sleeve, Retaining Ball, Retaining Sleeve
Spring (75), Thrust Ring (74), and Thrust Ring Lock (73).
5.
Remove the Hammer Case Assembly (62).
6.
Grasp the Hammer Frame (60) and carefully lift off the entire impact
mechanism, making certain not to drop the two Hammer Pins (61).
7.
If disassembly of the Impact Mechanism is not required, set the
mechanism aside.
8.
Remove the Hammer Frame Washer (58) from the end of the Rotor
(52) shaft. Remove the Air Impact Wrench from the vise.
For the 7/16'' Quick-Change Anvil Assembly
1.
Clamp the handle of the Air Impact Wrench in a leather or copper-
covered vise, square drive upward.
2.
Unscrew and remove the four Hammer Case Cap Screws (65).
3.
Remove the Thrust Ring Lock (82), Thrust Ring (83), and Retaining
Sleeve Spring (84).
*
Registered trademark of loctite Corporation.
2
NOTICE
Case Bushing (62) with grease. Inject approximately 2 to 4 cc of
grease into the Grease Fitting (37, 32).
2.
Use Ingersoll-Rand No. 10 Oil for lubricating the motor. Inject
approximately 1 to 2 cc of oil into air inlet (6, 21) before attaching the
air hose. Remove the Oil Chamber Plug (2) and fill the oil chamber.
The Retaining Ball (85) will fall free when the Retaining Sleeve (86) is
removed.
4.
Remove the Retaining Sleeve, Retaining Ball, and remove the
Hammer Case Assembly (62).
The Body Lock pin (81) will fall free when the Quick-Change Anvil
Body (80) is removed.
5.
Remove the Quick-Change Anvil Body, the Body Lock Pin.
6.
Grasp the Hammer Frame (60) and carefully lift off the entire impact
mechanism, making certain not to drop the two Hammer Pins (61).
7.
If disassembly of the Impact Mechanism is not required, set the
mechanism aside.
8.
Remove the Hammer Frame Washer (58) from the end of the Rotor
(52) shaft. Remove the Air Impact Wrench from the vise.
Disassembly of the Impact Mechanism
1.
Set the mechanism on a workbench, driver end up.
2.
Grasp the Anvil (66, 67, 72, or 79) and lift it from the impact
mechanism.
3.
Remove the two Hammer Pins (61) and the Hammer (59).
Disassembly of the Motor
1.
Grasp the splined end of the Rotor (52) and pull the entire motor from
the Housing (1).
2.
Lift off the Hammer Frame Washer (58).
3.
Lift off the Front End Plate (56). If the Front Rotor Bearing (57) needs
to be replaced, press it from the Front End Plate.
4.
Remove the Cylinder (54) and the Vanes (53).
5.
Remove the Rear Rotor Bearing Retainer (49) and slide the Bearing
(50) and the Rear End Plate (51) off the short hub of the Rotor.
6.
Remove the End Plate Gasket (48) from the Motor Housing.
7.
For Model 2902SB only, remove the Silencers (18) from the Motor
Housing.
Disassembly of the Reverse Valve
For Model 2902P
The Knob Screw (36) is installed with loctite
1.
Unscrew and remove the Knob Screw. Remove the Reverse Valve
Knob (35).
2.
Slowly rotate the Reverse Valve (11) back and forth while
withdrawing it from the reverse valve bushing.
Be careful not to lose the Detent Ball (33) and Detent Ball Spring (34)
from the hole in the side of the Reverse Valve.
3.
Remove the two Reverse Valve O-ring (12) from the undercut at
each end of the reverse valve bushing.
NOTICE
NOTICE
NOTICE
®*
.
NOTICE
Form 04584231-Edition 1
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