Always wear eye protection when operating or
performing maintenance on this tool.
Always turn off the air supply and disconnect the air
supply hose before installing, removing or adjusting
any accessory on this tool or before performing any
maintenance on this tool.
CHANGING THE MECHANISM FLUID
To change the Mechanism Fluid in the Impulse Mecha-
nism, proceed as follows:
1. For model 180PQ1 or 280PQ1, use a pointed probe
to to push the Spring Seat (75) against the Retaining
Sleeve Spring (74). While the Spring is compressed,
use another pointed probe or thin blade screwdriver
to remove the Retaining Ring (76). Lift the Spring
Seat, Spring and Bit Retaining Sleeve (73) off the
Drive Shaft (50) and remove the Bit Retaining Ball
(72).
2.
Remove the Rubber Housing Boot (77).
3.
Using copper–covered vise jaws, carefully grasp the
flats of the Mechanism Cover (67) with the output
end of the Drive Shaft downward.
4.
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. (Refer to Dwg. TPD1264)
CLOCKWISE TO LOOSEN
5. Lift the assembled motor off the Mechanism Cover
and pull the mechanism assembly out of the Cover.
6.
Using a 1.5 mm hex wrench, rotate the Torque Ad-
justment Screw (37) 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 (58)
and Oil Plug Seal (59).
8. With the oil plug opening downward over a container,
rotate the Drive Shaft to purge the fluid from the
mechanism.
MAINTENANCE SECTION
(Dwg. TPD1264)
9.
Using the syringe and fluid from the Fluid Replace-
ment Kit (Part No. EQ106S–K400), fill the mecha-
nism with the fluid furnished in the Kit. (Refer to
Dwg. TPD1265)
DO NOT SUBSTITUTE ANY OTHER FLUID.
Failure to use the fluid provided could damage the
tool, increase maintenance and decrease perfor-
mance. Use only clean fluid in these tools.
10. 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.
11. Thread the Oil Plug with the Oil Plug Seal into the
mechanism until it is snug.
12. Using a 1.5 mm hex wrench, turn the Torque Adjust-
ment Screw clockwise until it stops. This is the maxi-
mum torque position.
13. Wipe the outside of the mechanism dry and clean and
remove the Oil Chamber Plug. Using the syringe,
withdraw .4 cc of fluid.
14. Install the Oil Chamber Plug and tighten it between
20 and 25 in–lb (2.3 and 2.8 Nm) torque.
15. Insert the mechanism assembly, output end leading,
into the Mechanism Cover clamped in the vise jaws.
16. Insert the hex end of the rotor shaft into the hex re-
cess at the rear of the Drive Shaft and thread the as-
sembled Motor Housing onto the Mechanism Cover.
This is a left–hand thread. Rotate the Housing coun-
terclockwise to tighten it. (Refer to Dwg. TPD1266)
COUNTERCLOCKWISE TO TIGHTEN
21
(Dwg. TPD1265)
(Dwg. TPD1266)