Specifications

ORC SERIES, MODEL S CLUTCHES
9
ORC Series, Model S
BOSTON GEAR
BOSTON GEAR
®
VI. REPAIR INSTRUCTIONS
A. General Disassembly
1. All item numbers in parenthesis will refer to the key
numbers shown in the clutch exploded view drawing
and parts identification tables.
2. Place the clutch preferably in a three-jaw chuck with
the actuating plate or cover facing up.
3. There are two locking screws (25) located on the
face of the cover which lock down the reset spring
screw (14) and the drive spring screw (21). Loosen
these screws to relieve the pressure on the drive
spring screw and reset spring screw.
4. Turn the reset spring screw (14) counterclockwise to
relieve the compression on the reset spring (19).
5. Remove the sealing wax from the drive spring screw
(21) and turn the screw counterclockwise to relieve
the compression on the drive spring (18).
6. Remove the cover screws (27).
7. Pry off the cover (8). Use care not to break the inner
pilot of the cover (see Figure 16).
8. Remove the reset screw (14) and take out the reset
spring (19), and the ball thrust (20) through the hole
stamped 9.
9. Remove the reset pawl (11 ) by simply lifting out.
10. Remove the drive pawl (10) and the drive spring
(18). This will require a little more effort because of
the slight pressure on the drive spring.
11. Remove the housing (1) from the mounting surface
and press out the rotor (12).
12. If clutch is manual reset, remove the reset screw (24)
by turning clockwise into the housing.
13. Inspect hardened bushings (3) in housing (1) and
cover (8) for excessive wear.
14. Replace any worn or broken parts.
B. Basic Unit Assembly
1. If clutch is manual reset, install the reset screw (24)
from the inside of the housing turning counter-
clockwise until the reset screw pin stops the screw
from turning.
2. Press the long end of rotor (12) into housing
bearing (2).
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
(see Figure 17).
Cover
Pry Bar
Excessive Force
May Break Inner
Pilot of Cover
Pry Bar
Housing
FIGURE 16
Reset Pawl About 1/3
into Notch of Drive Pawl
Reset Screw Flush With
Surface of Housing
14
15
11
1
24
21
10
12
18
FIGURE 17