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2.
Install the Reverse Valve in the reverse valve bush ing
with the slotted end trailing,making sure that the the
index mark on the Reverse Valve is aligned with the
index mark on the Bushing. See Dwg. TPD1913
REVERSE LEVER IN
FORWARD POSITION
W W
The Reverse Valve must be installed and indexed with the
bushing as directed in Step 2 and Dwg. TPD1913. Failure to
do so will cause improper operation of the Reverse Valve.
3.
Insert the Reverse Lever (18) through the rear of the
Backcap (16).
4.
Slide the Reverse Lever Spring (20) over the shaft of
the Reverse Lever and secure the Spring and Reverse
Lever by installing the the Reverse Lever Snap Ring
(19) in the groove in the shaft of the Reverse Lever.
Rotate the Reverse Lever so that it is pointing to the
symbol for FORWARD (clockwise) operation. See
Dwg. TPD1913
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.
MAINTENANCE (Continued)
ALIGN REVERSE VA
V V LV
L L E
TIMING MARK WITH
MARK ON REVERSE
V V LVE BUSHING LO-
VA
L L
CATED IN HOUSING
A A
(Dwg. TPD1913)
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.
Assembly of the Square Drive Anvil and Spline
Drive Anvil
31
BOTTOM HAMMER
HALF–ROUND
NOTCH ON LEFT
BOTTOM HAMMER
WIDE BEVEL DOWN
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.
3.
Replace the Hammer Pins (36).
4.
Examine the base of the Anvil (40, 42 or 48) 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 bot-
tom Hammer.
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.
TOP HAMMER HALF–ROUND
NOTCH ON RIGHT
TOP HAMMER
WIDE BEVEL UP
(Dwg. TPD652)
Form P7715 Edition 1
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