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Assembly of the Impact Mechanism
● To ensure proper Reverse Valve operation, the Reverse Lever must stay in this position when installing the Backcap and Reverse Valve.
(Dwg. TPD652)
1. Coat the Hammers (35) with a light film of Ingersoll Rand No. 170 Grease.
2. Replace the Hammers in the Hammer Frame (34) exactly as they were when you marked them prior to disassembly.
● If you are installing new Hammers or want to change the location of the existing Hammers to utilize both impacting surfaces, slide
the Hammers in the Hammer Frame so that the half-round notch on one Hammer is located on one side of the Frame and the half-
round notch on the other Hammer is located on the other side of the Frame. These Hammers must be installed with the wide bevels
facing the web of the Hammer Frame as illustrated.
3. Replace the Hammer Pins (36).
4. Examine the base of the Anvil (40) and note its contour. While looking down through the Hammer Frame, swing the top Hammer to its full
extreme one way or another until you can match the contour of the Anvil. Enter the Anvil into the Hammer Frame and through the first
Hammer. Swing the bottom Hammer in the opposite direction from the top Hammer and maneuver the Anvil slightly until it drops into the
bottom Hammer.
Assembly of the Anvil
1. Place the Hammer Frame Washer (33), hub side first, over the hub of the Rotor and against the Front Rotor Bearing.
2. Set the assembled impact mechanism down over the splined hub of the Rotor. If the impact mechanism was disassembled, refer to Assembly
of Impact Mechanism.
3. Position the new Hammer Case Gasket (37) on Housing.
4. Work approximately 12 to 15 cc of Ingersoll Rand No. 170 Grease into the impact mechanism.
5. Smear a thin film of Ingersoll Rand No. 170 Grease on the inside surface of the Hammer Case Bushing (38) and place the Hammer Case (39)
down over the Anvil and against the Motor Retainer.
6. Install the Backcap Bolts and tighten them to 10 to 12 ft-lb (13 to 16 Nm) torque.
7. Remove the Impactool from the vise and inject 2 to 4 cc of Ingersoll Rand No. 170 Grease into the Grease Fitting (17).
6
NOTICE
BOTTOM HAMMER
HALF–ROUND
NOTCH ON LEFT
BOTTOM HAMMER
WIDE BEVEL DOWN
NOTICE
TOP HAMMER HALF–ROUND
NOTCH ON RIGHT
TOP HAMMER
WIDE BEVEL UP
TL-2922-MIM_ed1
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