Boston Gear • 800-825-6544
P-3002-BG
11
8. Apply grease to the threads of the reset spring
screw (15) and insert the assembly of the reset
spring screw, reset spring disc (16), reset
spring (18), and ball thrust (19) through the hole
stamped 9 on the housing. Tighten the reset
spring screw until it is flush with the surface of
the housing. (See Figure 15)
9. Fill the entire housing cavity with grease to
ensure a proper grease packing.
10. Install a return pin spring (34) over each return
pin (31). Locate the return pin holes in the cover
by placing the cover over the housing assembly.
11. Once the return pin hole locations have been
established, insert the return pins and springs
through the appropriate holes in the cover.
12. Install a snap ring (33) into the groove on the
end of each return pin (31).
13. Press the cover assembly onto the housing
assembly. Make sure that the trunnion holes
and the cover screw holes line up.
14. Install the cover screws (23) and tighten to the
suggested torques in Table 12.
15. Install the rotor snap ring (38) into the groove of
the rotor. The unit is now ready for testing.
C. Torque Verification
1. Place the clutch in a chuck or vise with the
cover facing upward.
2. Insert the appropriate size arbor and key into
rotor. (See Figure 16)
3. This step is for manual reset only. Go to next
step for automatic reset. Install the drive pawl
(10) into the appropriate hole in the housing
(1), and the reset pawl (11) into its appropriate
hole in the housing. Check the fit of the reset
pawl into the notch of the drive pawl with the
clutch disengaged. The reset pawl should fit
approximately one-third of the way into the
notch. Grinding the nose of the reset pawl may
be necessary to obtain the proper fit.
4. The drive pawl (10) and the drive spring (17) will
have to be installed simultaneously. If a drastic
change in torque is desired, use this step to
change the drive spring. Place one end of the
drive spring over the drive spring thrust washer.
Insert the knob of the drive pawl into the other
end of the drive spring. Insert the trunnion of
the drive pawl into the hardened bushing in
the housing, while the nose of the drive pawl
fits into the notch of the rotor (12). Install the
reset pawl (11) into its appropriate hole in the
housing. (See Figure 15)
5. Coat the inside of the housing and all
components with a quality all-purpose grease.
A Bentone type, NLGI grade 0 or equivalent
recommended.
6. Insert the reset spring disc (16) inside the reset
spring screw (15). Apply grease to the surface
of the disc.
7. If a drastic change in torque is desired, use this
step to change the reset spring. Place the reset
spring (18) on the surface of the reset spring
disc. Apply grease to the end of the ball thrust
(19) and insert ball thrust into the reset spring.
Figure 15 - Clutch Internal Components
15
Reset Screw Flush With Surface of Housing
16
11
1
5
20
17
12
10
Drive Screw Flush
Clutch
Size
Screw Size
Qty
Seating Torque
1
1/4-20
3
100 in.lb.
2
5/16-18
3
200 in.lb.
3
3/8-16
3
350 in.lb.
4
1/2-13
4
850 in.lb.
5
5/8-11
4
1,700 in.lb.
Table 12 - Cover Screw Seating Torques