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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
Mechanism, proceed as follows:
1. Remove the Rubber Housing Boot (45).
2. Using a hex wrench, remove the three Hammer Case
Cap Screws (43) and Lock Washers (44). Lift the
Hammer Case (39) off the Motor Housing (1) over the
Drive Shaft. Remove the Hammer Case Gasket (42).
3. Lift the assembled mechanism off the Rotor (28).
4. Using a 2 mm hex wrench, rotate the Torque
Adjustment Screw (53) clockwise until the Screw
stops. Rotate the Screw counterclockwise until it
stops or makes six complete revolutions.
5. Using a 2.5 mm hex wrench, unscrew and remove the
Oil Plug (56). Remove the Oil Plug Seal (57) and Oil
Plug Seal Support (58).
6. With the oil plug opening downward over a container,
rotate the Drive Shaft to purge the fluid from the
mechanism.
7. Thread the Tee Wrench included with the Tool Kit
(Part No. 700A–99 or 1900P–99) into the Piston Stop
Assembly (71) that is 180 degrees from the Torque
Adjustment Screw and pull the Stop Assembly toward
the output end of the mechanism until it stops.
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 until
the fluid overflows the fill hole. Model 1100P will
require 17 cc of fluid; Model 1410P, 23 cc and Model
1900P, 30 cc. (Refer to Dwg. TPD1265)
DO NOT SUBSTITUTE ANY OTHER FLUID.
Failure to use the impulse mechanism fluid
provided could damage the tool, increase
maintenance and decrease performance. Use only
clean fluid in these tools.
MAINTENANCE SECTION
(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. Remove the mechanism from from the fluid and use
the Tee Wrench to push the Piston Stop Assembly
slowly downward until fluid flows from the fill
opening.
11. Thread the Oil Plug with the Oil Plug Seal and Seal
Support into the mechanism until it is snug.
12. Using a 2 mm hex wrench, turn the Torque
Adjustment Screw clockwise until it stops. This is
the maximum torque position.
13. Wipe the outside of the mechanism dry and clean and
remove the Oil Chamber Plug. Using the syringe,
withdraw 0.85 cc of fluid from 1100P models, 0.85 cc
of fluid from 1410P models and 1.2 cc from 1900P
models.
14. Install the Oil Chamber Plug and tighten it between
20 and 25 in–lb (2.3 and 2.8 Nm) torque.
15. Position a new Hammer Case Gasket on the Motor
Housing and install the assembled mechanism on the
rotor shaft.
16. 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.
17. Install the Rubber Housing Boot on the tool.
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 fit 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 hooked wire to pull the Retaining Pin Spring
(65) out of the end of the Drive Shaft (63) and remove
the Socket Retaining Pin (64).
2. Remove the Rubber Housing Boot (45).
3. Using a hex wrench, remove the three Hammer Case
Cap Screws (43) and Lock Washers (44). Lift the
Hammer Case (39) off the Motor Housing (1) over the
Drive Shaft. Remove the Hammer Case Gasket (42).
4. Lift the assembled mechanism off the Rotor (28).
5. Grasp the flats of the Housing (51) in vise jaws with
the output end of the Drive Shaft downward.
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