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WARNING
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.
Note: When reading the instructions, refer to exploded diagrams in Parts Information Manual when applicable (see under Related
Documentation for form numbers).
Changing The Mechanism Fluid
To change the Mechanism Fluid in the Impulse Mechanism,
proceed as follows:
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. This is a left–hand
thread, rotate the Motor Housing clockwise to remove it.
Refer to Dwg. TPD1292.
(Dwg. TPD1292)
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 (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. Using the syringe and fl uid from the Fluid Replacement Kit (Part
No. EQ106S–K400), fi ll the mechanism with the fl uid furnished in
the Kit.
Refer to Dwg. TPD1293.
NOTICE
Do Not Substitute Any Other Fluid.
Failure to use the impulse mechanism fl uid provided could
damage the tool, increase maintenance and decrease
performance. Use only clean fl uid in these tools.
(Dwg. TPD1293)
10. Submerge the fi ll opening in the remainder of the fl uid, 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 Adjustment Screw
clockwise until it stops. This is the maximum torque position.
Back the Screw off between 3/4 and 1–1/4 turns to avoid erratic
readings.
13. Wipe the outside of the mechanism dry and clean and remove
the Oil Chamber Plug. Using the syringe, withdraw .25 cc of fl uid
from 180SQ1 models and .3 cc of fl uid from 280SQ1 models.
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 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.
Refer to Dwg. TPD1294.
(Dwg. TPD1294)
