Model
Handle
40PSQ1
pistol
45PS3
pistol
45PSQ1
pistol
55PS3
pistol
55PSQ1
pistol
70PS3
pistol
90PS4
pistol
Changing the Mechanism Fluid
To change the Mechanism Fluid in the Impulse Mechanism,
proceed as follows:
1. For Models 40PSQ1, 45PSQ1 or 55PSQ1, use a
pointed probe to push the Spring Seat (103) against the
Retaining Sleeve Spring (102). While the Sleeve is
compressed, use another pointed probe or thin blade
screwdriver to remove the Retaining Ring (104). Lift
the Spring Seat, the Spring and the Bit Retaining
Sleeve (101) off the Drive Shaft (75) and remove the
Bit Retaining Ball (100).
❑ Continue here for Models 40PSQ1, 45PSQ1 and
55PSQ1
➢ Step 1 for Models 45PS3 and 55PS3
Using copper-covered vise jaws, carefully grasp the
Flats of the Hammer Case (98) with the output end of
the Drive Shaft downward.
2. Using an adjustable wrench, unscrew the Motor
Housing Assembly (1) from the Hammer Case. This is
a left-handed thread, rotate the Motor Housing
clockwise to remove it. (Refer to Dwg. TPD1264)
CLOCKWISE TO LOOSEN
HOW TO ORDER AN IMPULSE WRENCH
Recommended
Drive
Hose ID
in.
in.
1/4 hex
.250
3/8 sq
.250
1/4 hex
.250
3/8 sq
.250
1/4 hex
.250
3/8 sq
.375
1/2 sq
.375
MAINTENANCE SECTION
(Dwg. TPD1264)
Free Speed
Recommended Torque Range
Soft Draw
(rpm)
Nm (ft-lb)
5000
5-10 (3.7-7.4)
7000
8-15 (5.9-11.1)
7000
7-13 (5.2-9.6)
6000
10-20 (7.4-14.8)
6000
8-15 (5.9-11.1)
5500
36-47 (26.6-34.7)
5000
51-78 (37.6-57.6)
3.
Lift the assembled motor off the Hammer Case and
pull the mechanism assembly out of the Cover.
❑ Go to Step 4 for Models 40PSQ1, 45PS3,
45PSQ1, 55PS3 and 55PSQ1
➢ Step 1 for Models 70PS3 and 90PS4
Using a hex wrench, remove the 4 Hammer Case
Screws (107) and Lock Washers (106). Lift the
Hammer Case (98) off the Motor Housing over the
Drive Shaft. Remove the Hammer Case Gasket (108).
4.
With the assembled mechanism off of the Rotor, use
Oil Plug Wrench to unscrew and remove the Oil Plug
(85) and Oil Plug Seal (84) from the front end of the
Mechanism.
5.
Using the 1.5 mm hex wrench (F) furnished with the
tool, rotate the Torque Adjustment Screw identified
with yellow paint counterclockwise until it stops. This
screw adjusts the check valve.
6.
With the oil plug opening downward over a container,
rotate the Drive Shaft to purge the fluid from the
mechanism.
7.
Using the syringe and fluid from the Fluid
Replacement Kit (Part No. EQ106S-K400), fill the
mechanism with the fluid furnished with the Kit until
the fluid overflows the fill hole.
(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.
35
Hard Draw
Nm (ft-lb)
8-13 (5.9-9.6)
13-20 (9.6-14.2)
11-17 (8.1-12.6)
10-28 (11.8-20.7)
13-22 (9.6-16.2)
37-58 (27.3-41.8)
59-80 (43.5-59)