17
MAINTENANCE SECTION
CHANGING THE MECHANISM FLUID
To change the Mechanism Fluid in the Impulse
Mechanism, proceed as follows:
1.
For Model 55PQ1 or 60PQ1, use a pointed probe to
to push the Spring Seat (72) against the Retaining
Sleeve Spring (71). While the Spring is compressed,
use another pointed probe or thin blade screwdriver
to remove the Retaining Ring (73). Lift the Spring
Seat, Spring and Bit Retaining Sleeve (70) off the
Drive Shaft (68A) and remove the Bit Retaining
Ball (69).
2.
For 55P3 or 60P3, using copper–covered vise jaws,
carefully grasp the flats of the Mechanism Cover (59)
with the output end of the Drive Shaft downward.
Use a hooked wire to pull the Retaining Pin Spring
(64) out of the end of the Drive Shaft (62) and re-
move the Socket Retaining Pin (63).
3.
Using an adjustable wrench, unscrew the the Motor
Housing Assembly (1) from the Mechanism Cover.
This is a left–hand thread, rotate the Motor Housing
clockwise to remove it. See Dwg. TPD1264.
CLOCKWISE TO LOOSEN
(Dwg. TPD1264)
4.
Lift the assembled motor off the Mechanism Cover
and pull the mechanism assembly out of the Cover.
5.
Using a 1.5 mm hex wrench, rotate the Torque
Adjustment Screw (33) clockwise until the Screw
stops. Rotate the Screw counterclockwise until it
stops or makes six complete revolutions.
6.
Using the special Tee Wrench furnished in the Tool
Kit (Part No. 55P–199), remove the Oil Plug (50) and
Oil Plug Seal (51).
7.
With the oil plug opening downward over a container,
rotate the Drive Shaft to purge the fluid from the
mechanism. As an alternate method, using the
syringe from the Fluid Replacement Kit (Part
No. EQ106S–K400), purge the fluid from the first
cavity. Then rotate the Drive Shaft to expose the
second cavity and purge the fluid using the syringe.
8.
Using the syringe and fluid from the Fluid
Replacement Kit (Part No. EQ106S–K400), fill the
mechanism with the fluid furnished in the Kit.
See Dwg. TPD1265.
DO NOT SUBSTITUTE ANY OTHER FLUID.
Failure to use the fluid provided could damage the
tool, increase maintenance and decrease
performance. Use only clean fluid in these tools.
(Dwg. TPD1265)
9. Submerge the fill opening in the remainder of the
fluid, and using a wrench, rotate the Drive Shaft to
purge any remaining air from the system.
10. Thread the Oil Plug with the Oil Plug Seal into the
mechanism until it is snug.
11. Using a 1.5 mm hex wrench, turn the Torque
Adjustment Screw clockwise until it stops. This is the
maximum torque position.
12. Wipe the outside of the mechanism dry and clean and
remove the Oil Chamber Plug. Using the syringe,
withdraw .3 cc of fluid.
13. Install the Oil Chamber Plug and tighten it between
20 and 25 in–lb (2.3 and 2.8 Nm) torque.
14. Insert the mechanism assembly, output end leading,
into the Mechanism Cover clamped in the vise jaws.
15. Insert the hex end of the rotor shaft into the hex
recess at the rear of the Drive Shaft and thread the
assembled Motor Housing onto the Mechanism
Cover. This is a left–hand thread. Rotate the
Housing counterclockwise to tighten it.
See Dwg. TPD1266.
COUNTERCLOCKWISE TO TIGHTEN
(Dwg. TPD1266)