Blade Replacement; Bolt Replacement; Slip Clutch Operational Check; Slip Clutch Adjustment - Bush Hog RTS40 Operator's Manual

4-3 BLADE REPLACEMENT

WARNING
THE TILLER CAN FALL FROM HYDRAULIC
SYSTEM FAILURE. TO AVOID SERIOUS
INJURY OR DEATH, SECURELY SUPPORT
TILLER BEFORE WORKING UNDERNEATH.
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.
CAUTION
FAILURE TO RETIGHTEN SPRING NUTS
TO ORIGINAL POSITION MAY CAUSE
DAMAGE TO TILLER AND/OR TRACTOR
DUE TO IMPROPER SLIP CLUTCH
TORQUE SETTING.

4-6 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.
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Figure 4-2 Blade Wear
Figure 4-3 Shear Bolt
Figure 4-4 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
or Binacchi
(Solid Casting)
Spring
Length
EG
(Holes Through Center)