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3
Disassembly
General Instructions
1. Do not disassemble the tool any further than necessary to replace
or repair damaged parts.
2. When 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 fi t in or on an assembly
unless the removal of that part is necessary for repairs or
replacement.
Disassembly of the Impulse Mechanism
1. Use a pointed probe to push the Spring Seat (66) against the
Retaining Sleeve Spring (65). While the Spring is compressed, use
another pointed probe or thin blade screwdriver to remove the
Retaining Ring (67). Lift the Spring Seat, Spring and Bit Retaining
Sleeve (64) off the Drive Shaft (43) and remove the Bit Retaining
Ball (63).
2. Remove the Rubber Housing Boot (68).
3. Using copper–covered vise jaws, carefully grasp the fl ats of the
Mechanism Cover (58) with the output end of the Drive Shaft
downward.
4. Using an adjustable wrench, unscrew the Motor Housing
Assembly (1) from the Mechanism Cover.
NOTICE
This is a left–hand thread, rotate the Motor Housing clockwise
to remove it.
Refer to Dwg. TDP1292.
5. Lift the assembled motor off the Mechanism Cover and pull the
mechanism assembly out of the Cover. Remove the Bushing
Spacer (61).
6. Using a 1.5 mm hex wrench, rotate the Torque Adjustment
Screw (30) clockwise until the Screw stops. Rotate the Screw
counterclockwise until it stops or makes six complete revolutions.
7. Using the special Tee Wrench furnished in the Tool Kit (Part No.
180PQ–99), remove the Oil Plug (49) and Oil Plug Seal (50).
8. With the oil plug opening downward over a container, rotate the
Drive Shaft to purge the fl uid from the mechanism.
9. Grasp the fl ats of the Housing Assembly (29) in vise jaws with the
output end of the Drive Shaft downward.
10. Insert the pins of the spanner plug from the No. 180PQ–99 Tool
Kit into the two holes in the Housing Cap (35). Using a wrench on
the plug, unscrew and remove the Housing Cap from the Housing
Assembly.
Refer to Dwg. TPD1295.
Spanner
Plug
Counterclockwise
to Loosen
(Dwg. TPD1295)
11. Stand the disassembly arbor from the Tool Kit, large end
downward, on a workbench or the table of an arbor press. Insert
the output end of the Drive Shaft into the central opening and
either tap the Housing downward off the components or use the
pressing sleeve in the Kit to press the Housing downward off the
components.
Refer to Dwg. TPD1296.
Pressing
Sleeve
Housing
Tap edge lightly with
brass hammer or use
pressing sleeve from
tool kit
Disassembly Arbor
from tool kit
(Dwg. TPD1296)
12. Disassemble the components of the mechanism in the sequence
shown in Drawing TPA1341 on Page 17.
Disassembly of the Motor
1. Grasp the Motor Housing (1) in vise jaws with the shaft of the
Rotor (23) upward.
2. Insert the pins of the end plate spacer spanner into the holes in
the Front End Plate Spacer (28). Using a wrench, unscrew and
remove the Spacer. This is a left–hand thread; rotate the wrench
clockwise to remove the Spacer.
Refer to Dwg. TPD1297.
End Plate
Spacer Sapnner
Clockwise to Loosen
(Dwg. TPD1297)
3. Reposition the Motor Housing in the vise jaws so that the vise
jaws grip the end of the rotor shaft and the Housing is horizontal.
Tap the edges of the Housing surrounding the motor bore with a
plastic hammer to separate the Housing from the motor.
Refer to Dwg. TPD1298.
(Dwg. TPD1298)
