12
Figure 4-2 Blade Wear
Figure 4-3 Shear Bolt
Figure 4-4 Spring Length
Spring
Length
Bondioli & Pavesi
or
Binacchi
1.12”
(28.6 mm)
EG/Comer
1.25”
(31.8 mm)
Figure 4-5 Slip Clutch Identification
Bondioli & Pavesi EG
or Binacchi (Holes Through Center)
(Solid Casting)
4-6 SLIP CLUTCH ADJUSTMENT
The slip clutch is factory preset to the correct torque
for protecting implement and tractor. Periodic adjust-
ment is recommended; refer to section 4-5. Should
adjustment be needed, first check to be sure all
spring lengths are within 1/64” of being the same.
Initial spring lengths are shown in figure 4-4. If neces-
sary, loosen nut on any spring that is unequal. Adjust
all eight spring retaining nuts 2/3 of a turn (2 flats on a
nut) and check clutch slippage. If further adjustment is
necessary, do so in 1/3 turn increments or consult
your Bush Hog dealer. Adjust only to provide suffi-
cient torque to prevent slippage under normal condi-
tions. When rocks, roots, etc. are present, occasional
slippage is normal for drivetrain protection.
CAUTION
FAILURE TO RETIGHTEN SPRING NUTS
TO ORIGINAL POSITION MAY CAUSE
DAMAGE TO TILLER AND/OR TRACTOR
DUE TO IMPROPER SLIP CLUTCH
TORQUE SETTING.
4-3 BLADE REPLACEMENT
Tiller blades should be replaced when they have
approximately 1/4” of wear left on tip of blade.
(Figure 4-2) To replace blades, remove bolts secur-
ing blade. Install new blade. Blade must be a right or
left corresponding to blade removed. Tighten blade
bolts to 73 ft./lbs. Use only genuine Bush Hog
replacement parts.
4-4 BOLT REPLACEMENT
A. Slide yoke shield back. (Figure 4-1)
B. Drive out sheared bolt with hammer and punch.
C. Align holes and install new shear bolt. Use only
genuine Bush Hog replacement shear bolt. (Figure 4-3)
D. Slide yoke shield securely in place.
4-5 SLIP CLUTCH OPERATIONAL CHECK
After tiller has been stored for an extended period of
time, perform the following operational check:
A. Loosen eight nuts retaining clutch springs exactly
one full turn.
B. With tiller blades firmly on ground and tractor at
idle speed, engage tractor PTO drive 2-3 seconds.
Clutch should slip without turning blades. If clutch does
not slip, contact your authorized Bush Hog dealer.
C. Retighten nuts to within 1/64” of original position.
Initial spring length is shown in Figure 4-4.
WARNING
THE TILLER CAN FALL FROM HYDRAULIC
SYSTEM FAILURE. TO AVOID SERIOUS
INJURY OR DEATH, SECURELY SUPPORT
TILLER BEFORE WORKING UNDERNEATH.
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