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Models 2934P/2940P Impactools are equipped with a
combination power regulator/reverse valve designed to
provide power adjustment while maintaining full power in
the reverse direction. Since the reverse direction is used
primarily for loosening right–hand threaded fasteners and
full power is required, no provision is made for power
adjustment in this direction. The power output is calibrated
by the numbers "1" through "5" stamped on the Housing
Cover Assembly (44).
The numbers 1 thru 5 on the housing are only for
reference and DO NOT denote a specific power output.
One (1) designates the lowest power while five (5)
denotes the highest.
Always wear eye protection when operating or
performing maintenance on this tool.
Always turn off air supply and disconnect air supply
hose before installing, removing or adjusting any
accessory on this tool, or before performing any
maintenance on this tool.
LUBRICATION
Each time the Models 2934P and 2940P Impactools are
disassembled for maintenance and repair or replacement of
parts, lubricate the tool as follows:
1.
Work approximately 6 cc of Ingersoll–Rand Grease
No. 100 into the impact mechanism. Coat the
Anvil (68) lightly with grease around the Hammer
Case Bushing (47). Inject approximately 6 cc of
grease into the Grease Fitting.
2.
Fill the oil reservoir in the handle with Ingersoll–Rand
No. 50 Oil. Inject approximately 3 cc of oil into the air
inlet before attaching the air hose. Remove the Oil
Chamber Plug (48) and fill the oil chamber.
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.
SETTING THE POWER REGULATOR
MAINTENANCE SECTION
Power Adjustment in the Forward Direction
1.
While facing the back of the Impactool, push the
Reverse Lever (32) to the extreme right position.
2.
Using a screwdriver, rotate the Power Regulator (39)
so that the slot aligns with the desired power
calibration.
3.
The power of the 2934P/2940Pis now adjusted for the
forward direction but will still have full power in the
reverse direction. This adjustment will not change
regardless of how many times you shift the Reverse
Lever as long as you do not change the power
selection.
4.
Do not disassemble the tool unless you have a
complete set of new gaskets and O–rings for
replacement.
Disassembly of the Impactool
1.
Clamp the handle of the Impactool in a vise with the
square drive upward.
2.
Unscrew and remove the four Hammer Case Cap
Screws (72).
3.
While lightly tapping on the end of the Anvil (68 or
79) with a plastic hammer, lift off the Hammer Case
Assembly (69).
4.
Grasp Hammer Frame (65) and cardfully lift off entire
impact mechanism, making certain not to drop the two
Hammer Pins (66).
Disassembly of the Impact Mechanism
1.
Set the mechanism, driver end up, on the workbench.
Note the twin Hammers (67) within the Hammer
Frame Assembly (65). These are identical but must
be placed in the Hammer Frame Assembly 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 the mechanism sitting upright on the workbench,
slowly rotate the Anvil (68 or 79) 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 it comes up
solid.
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