Craftsman 9-19905 - 1/2dr 1/4npt 500ft/lb Sq Dr Impact Wrench Owner's Manual page 15

1. Coat the Hammers (14) with a
light film of Craftsman No.
18830 Grease.
2. Heavily coat the jaws of the
Anvil (8) with Craftsman No.
18830 Grease.
3. Replace the Hammers In the
Hammer Frame (12) exactly as
they were when you marked
them prior to disassembly.
NOTICE: If you are installing
new Hammers or want to
change the location of the exist-
ing Hammers to utilize both im-
pacting surfaces, slide the
Hammers in the Hammer
Frame so that the half-round
notch on one Hammer is lo-
cated on one side of the Frame
and the half-round notch on the
other Hammer is located on the
other side of the Frame.
4. Replace the Hammer Pins (13).
5. Examine the base of the Anvil
(8) and note its contour. While
looking down through the Ham-
mer Frame, swing the top Ham-
mer 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 direc-
tion from the top Hammer and
maneuver the Anvil slightly until
it drops into the bottom Ham-
mer. See Figure 18.
Assembly of the Air Wrench
1. Position the Motor Housing (19)
in leather-covered vise jaws
with the splined shaft of the
Rotor in a horizontal position.
2. Place the assembled impact
mechanism down onto the
splined hub of the Rotor.
3. Position the Hammer Case
Gasket (18) against the face of
the Motor Housing.
NOTICE: Be sure that the flat
on the bottom of the Hammer
Case Gasket is installed in the
corresponding flat in the Hous-
ing. If the Hammer Case Gas-
ket is not installed correctly, the
Air Wrench will not function
properly. See Figure 19.
4. Apply a thin film of Craftsman
No. 18830 Grease on inside
surface of the Hammer Case
Bushing (16), and place the
Hammer Case (15) down over
the Anvil and against the Motor
Housing.
5.
Front of housing
Figure 19
Install the Hammer Case
Screws (11) and tighten them to
25 in-lb (2.8 Nm) torque.
15