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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.
Note: When reading the instructions, refer to exploded diagrams in parts Information Manuals when applicable (see under Related Documentation
for form numbers).
Lubrication
Each time a Series 2934 or 2940 Impact Wrench is disassembled for
maintenance and repair or replacement of parts, lubricate the tool
as follows:
1. Work approximately 12 to 15 cc of Ingersoll Rand No. 170
Grease into the impact mechanism. Coat the Anvil (48) lightly
with grease. Also, coat the inside of the Hammer Case
Bushing (34) with grease. Inject approximately 2 to 4 cc of grease
into the Grease Fitting (2).
Disassembly
General Instructions
1.
Do not disassemble the tool any further than necessary to replace
or repair damaged parts.
2.
Whenever grasping a tool or part in a vise, always use leather-
covered or copper-covered vise jaws to protect the surface of
the part 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 Impact Wrench
1. Grasp tool in copper–covered or leather–covered vise jaws with
square drive upward.
2. Using a hex wrench, unscrew and remove the two Deflector
Screws (27E). Remove Exhaust Deflector (27A) and Exhaust
Gasket (27D) and, if necessary, pull Exhaust Baffle (27C) and
Exhaust Silencer (27B) from Deflector.
3. Using a Hex Wrench, unscrew and remove the four Hammer Case
Cap Screws (36) and Lock Washers (37). Remove Dead Handle
Bracket (54) and two Bracket Spacers (55).
4. While lightly tapping on the end of Anvil (48) with a Plastic
Hammer, lift off Hammer Case (33).
5. Remove the Hammer Case Gasket (35).
6. Remove Anvil by rotating it as it is lifted out of the assembly.
7. Lift remaining Hammer Assembly off rotor shaft.
8. Push two Hammer Pins (41) out of the Hammer Frame
Assembly (40) and slide two Hammers (42) out of the Frame.
Disassembly of the Impact Mechanism
1. Set mechanism, driver end up, on a workbench.
Note the Twin Hammers within the Hammer Frame. These are
identical, but must be placed in the Hammer Frame in a certain
relationship. Using a felt–tipped pen, mark the Top Hammer
"T" and the Bottom Hammer "B" with the arrows pointing
upward. Mark both Hammers on the same end.
2. With mechanism sitting upright on a workbench, slowly rotate
Anvil in a clockwise direction until it comes up solid.
If you continue to rotate the Anvil, it will cam the Hammers out
of engagement. Do not allow this to happen; merely rotate the
Anvil until if comes up solid.
3. Hold Hammer Frame firmly and, without disturbing hammers,
gently lift Anvil, simultaneously rotating it clockwise about 1/8 of
a turn, from the Hammer Frame.
2
NOTICE
NOTICE
WARNING
2. Use Ingersoll Rand No. 10 Oil for lubricating the Motor. Inject
approximately 1 to 2 cc of oil into the Straight Inlet (11) before
attaching the Air Hose.
The twin hammers will be free to slide from the Hammer Frame
when the Hammer Pins are removed. Do not drop the Hammers.
4. With Anvil removed, lift out the two Hammer Pins.
5. Remove the Hammers.
Disassembly of the Reverse Valve
1. Lightly clamp Motor Housing Assembly (25) in leather–covered
or copper–covered vise jaws with Trigger Handle Assembly (1)
upward.
Excessive clamping pressure will distort the Motor Housing
and make motor removal extremely difficult. Do not insert the
hammer case end of the Motor Housing more than 1" (25 mm)
into the vise jaws.
2. Using a hex wrench, unscrew and remove the four Handle Cap
Screws (38) and Lock Washers (39). Lift assembled Handle and
Handle Gasket (15) off Motor Housing and set them aside.
3. Lift Motor Clamp Washer (16) off Housing.
4. Move Reverse Lever (28) to center position and using a Drift Pin
to push from below, grasp Lever and lift Reverse Valve Assembly
(31) out of Housing.
Make certain the Lever is in the center position to avoid jamming
the Reverse Lock Plunger (29) when the Reverse Valve Assembly
is removed.
5. Pull Lever off Reverse Valve and remove Reverse Valve Bushing
Seal (32) from groove on Valve.
6. Using needle nose pliers, remove Reverse Lock Plunger and
Reverse Lock Plunger Spring (30) from Motor Housing.
Disassembly of the Motor
1. Remove assembled Motor and Motor Housing from vise jaws and
using a Plastic Hammer, tap splined shaft of Rotor (19) to dislodge
Rotor from Front Rotor Bearing (23).
2. Lift Motor Housing (25) off Rotor, Rear End Plate (17) and Rear
Rotor Bearing (18) which will remain together as a unit.
3. Remove six Vanes (20) from Rotor.
4. Pull Rear End Plate off Rotor.
5. Open a set of vise jaws wide enough to clear hub of Rear End
Plate and sharply rap hub end of End Plate on top of jaws to
dislodge Rear Rotor Bearing.
6. Remove Cylinder Dowel (24) and lay Motor Housing on top of
vise jaws with Front Rotor Bearing (23) downward between jaws.
Using a soft Drift Pin, Tap Bearing out of the Housing.
NOTICE
NOTICE
NOTICE
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