Slip Clutch Adjustment - Woods BATWING BW20.61Q Operator's Manual

1. Inspect blade pin (7) for nicks or gouges, and if you
find any, replace the blade pin.
2. Insert blade pin through the blade. Blade should
swivel on blade pin; if it doesn't, determine the
cause and correct.
3. Align crossbar (8) with blade access hole in cutter
frame. Apply a liberal coating of Never-Seez
equivalent to blade pin and crossbar hole. Make
sure blade offset is down away from cutter.
4. Insert blade pin (7) through blade. Push blade pin
through crossbar.
5. Install shims (9 & 10) over blade pin.
NOTE: Only use enough shims to allow keyhole
plate (11) to slide into blade pin groove.
6. Install blade clip (12) over keyhole plate and into
blade pin groove.
7. Secure into position with cap screw (50). Torque
cap screw to 85 lbs-ft.
8. Repeat steps for opposite side.
NOTE: Blade should be snug but should swivel on
pin without having to exert excessive force. Blade
should not move more than a 1/4 inch up or down
at the tip. Keep any spacers not used in the instal-
lation as replacements or for future installation.
Blade Sharpening
1. Sharpen both blades at the same time to maintain
balance. Follow original sharpening pattern.
2. Do not sharpen blade to a razor edge—leave at
least a 1/16" blunt edge.
3. Do not sharpen back side of blade.
NOTICE: When sharpening blades, grind the same
amount on each side to maintain balance. Replace
blades in pairs. Unbalanced blades will cause
excessive vibration, which can damage gearbox
bearings. Vibration may also cause structural
cracks to cutter.
MAN1282 (3/09/2020)
®
or
2-PLATE SLIP CLUTCH ADJUSTMENT
(Figure 9)
The slip clutch is designed to slip so that the gearbox
and driveline are protected if the cutter strikes an
obstruction.
A new slip clutch or one that has been in storage over
the winter may seize. Before operating the cutter, make
sure slip clutch will slip by performing the following
operation:
1. Turn off tractor engine and remove key.
2. Remove driveline from tractor PTO.
3. Loosen six 10 mm cap screws (6) to remove all
tension from Belleville spring plate (5).
4. Hold clutch hub (3) solid and turn shaft to make
sure clutch slips.
5. If clutch does not slip freely, disassemble and clean
the thrust plate faces (4), flange yoke (1), and
clutch hub (3).
6. Reassemble clutch.
7. Tighten Belleville spring plate (5) until it is against
the thrust plate (4) of the clutch, and then back off
each of the six nuts by 2 full revolutions. The gap
between Belleville spring plate and thrust plate
should be 1/8" as shown in Figure 9.
8. If a clutch continues to slip when the spring is
compressed to 1/8" gap, check friction discs (2) for
excessive wear. Discs are 1/8" when new. Replace
discs after 1/16" wear. Minimum disc thickness is
1/16".
Owner Service 23
Figure 8. Blade Sharpening