Bush Hog RTS manual 4-3BLADE REPLACEMENT, 4-4BOLT REPLACEMENT, 4-5SLIP CLUTCH OPERATIONAL CHECK

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.

Figure 4-2 Blade Wear

Figure 4-3 Shear Bolt

Figure 4-4 Spring Length

Bondioli & Pavesi	Spring
or	Length
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)

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