Bush Hog 306, 305 4-4BLADE REPLACEMENT, 4-5SLIP CLUTCH OPERATIONAL CHECK, is in good condition

5.PTO Driveline - Disconnect PTO driveline, pull the two sections apart, apply thin coat of multi-

purpose grease to inside of outer (female) sec tion. Reassemble sections and install. Pull each section to be sure driveline and shields are securely connected. Make certain PTO shielding

is in good condition.

6.Gearbox - Add EP80W-90 gear oil as necessary to bring oil level to check plug on top of housing.

(4) Before Each Use (5) Before Each Use

	To remove yoke shield:
	Turn slotted head 90° with
	screwdriver, remove turn screw
(1) Before Each Use	and slide cover back.

WARNING

THE CUTTER CAN FALL FROM HYDRAULIC

SYSTEM FAILURE. TO AVOID SERIOUS

INJURY OR DEATH, SECURELY SUPPORT

CUTTER BEFORE WORKING UNDERNEATH.

4-3 BLADE HOLDER ASSEMBLY REMOVAL AND INSTALLATION

A. Remove the lower shaft nut and lockwasher. B.Wearing heavy gloves, grasp blade holder and

pull off tapered shaft. If stuck, align bolt with access hole in top of cutter deck. Using sledge hammer and

a piece of pipe, strike blade bar. Rotate pan to the other blade bolt and strike blade bar. Repeat until blade holder comes off. Care should be taken not to damage blade bolt threads.

REPLACEMENT

A.Replace blade holder and tighten the lower

shaft nut to 600 ft./lbs. If a torque wrench is not available, the nut should be tightened with a wrench having a three foot handle, or a section

of pipe over the wrench handle, if a wrench of this size is not available.

B. Strike the blade holder several times with a heavy hammer and retighten lower shaft nut. This should be repeated several times.

4-4 BLADE REPLACEMENT (Figure 4-2)

It is not necessary to remove the complete blade holder assembly to replace the blades. Blade bolts are accessible through a hole in the top of the cutter deck. Always replace both blades on a spindle using two blades having the same weight. Use only gen- uine Bush Hog replacement parts.

A. Raise cutter and securely block in position.

Figure 4-1 Lubrication

(6) Before Each Use

(3) Before Each Use

(2) Before Each Use

Figure 4-2 Blade Nut Removal

1-11/16” Socket

B. Remove nuts from blade bolts using a 1-11/16” socket through the access hole in the deck.

C. Inspect blade bolt shoulder for wear. Replace if necessary.

D. Assemble new blades to blade holder using

blade bolts, nuts and lockwashers. Tighten nuts to 450 ft./lbs . Strike blade bolt head with heavy ham-

mer to seat, then retighten.

E.Check to be sure blades swing 360° freely. If blades will not swing freely, remove, locate problem, and repair. Operating cutter when blades will not swing freely will cause excessive vibration, damaging implement.

4-5 SLIP CLUTCH OPERATIONAL CHECK

After implement had been stored for 30 days or more, perform the following operational check:

A. Loosen eight nuts retaining clutch springs 1/3 turn or until spring can be turned with fingers.

B. With tractor at idle speed, engage tractor PTO drive for 2-3 seconds. Clutch should slip without

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