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18. Make certain the Drive Shaft rotates freely and then
fill the mechanism with fluid and reassemble the tool
as instructed in the section, CHANGING THE
MECHANISM FLUID.
19. After assembling the tool, check the torque output
with a torque tester or pulse counter.
If the output is not acceptable, adjust the torque out-
put as instructed in the section TORQUE ADJUST-
MENT on Page 2.
If the output is acceptable, proceed as follows:
a. Using a hex wrench, remove the three Hammer
Case Cap Screws (86) and Lock Washers (87).
Lift the Hammer Case (83) off the Motor Housing
(1) over the Drive Shaft. Remove the Hammer
Case Gasket (81).
b. Lift the assembled mechanism off the Rotor (43).
c. Grasp the flats of the Housing (48) in vise jaws
with the output end of the Drive Shaft downward.
d. Insert the pins of the Spanner Plug from the
No. 700A–99 or No. 1900P–99 Tool Kit into two
holes in the Housing Cap (50). Using a wrench
on the plug, unscrew and remove the Housing
Cap from the Housing. This is a left–hand
thread, rotate the plug counterclockwise to
loosen the Cap.
MAINTENANCE SECTION
21
e. Apply thread sealant to the threads of the Cap and
using the Spanner Plug furnished with the Tool
Kit and a torque wrench, install the Housing Cap,
castellated end leading. This is a left–hand
thread; rotate the wrench counterclockwise to
tighten the Cap. Tighten the Cap on model
1100PS4 between 137 and 152 ft–lb (186 and
206 Nm) torque and on model 1900PS4 between
173 and 188 ft–lb (235 and 255 Nm) torque.
f. Position a new Hammer Case Gasket (81) on the
Motor Housing and install the assembled
mechanism on the rotor shaft.
g. Place the Hammer Case Cover over the Drive
Shaft against the Housing and Gasket. Install the
three Hammer Case Cap Screws and Lock
Washers. Tighten each Screw between 45 an
50 in–lb (5.1 and 5.6 Nm) torque.
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