Bush Hog 280 manual POINT Lift Models, Front View of Model 287 Lower Hitch Points

5-2 3-POINT LIFT MODELS (287)

A.Attach A-frame struts to mounting brackets using 5/8” x 2” capscrews and locknuts as shown. (Fig. 5-1)

B.Place flex link and pivot tube between top of A- frame struts. Place support yokes on outside of A- frame struts. Fasten together using a 5/8” x 6” cap- screw and locknut. Attach the opposite ends of the support yokes over the welded strongback tubes which are located closest to the gearbox using 5/8” x 8” capscrews, flatwasher and locknut.

C.For single tailwheel mounting, position tail- wheel bracket on rear of cutter deck as shown. (Fig. 5-1) Align holes in tailwheel weldment with holes in support yokes and strongback tubes (tubes located closest to the gearbox). Fasten with the 5/8” x 8” capscrews, flatwasher and locknut.

D.Place flatwasher on wheel spindle. Install wheel on tailwheel weldment securing with roll pin.

E.Bolt adjusting bracket to cutter deck using 5/8”

x2” capscrew and locknut.

F.Place tailwheel frame into desired position and fasten with 1/2” x 1-3/4” capscrews, lockwashers and nuts.

G.For mounting dual tailwheels, position tailwheel bracket at the rear tubes located in the strongbacks. (Fig. 5-2) Align holes in tailwheel weldment with holes in strongback. Install pivot bushings and fas- ten with 3/4” x 8” capscrews and flange locknuts. Pin ratchet or lift cylinder (8” stroke) to axle and deck assembly.

H.Place flatwashers on wheel spindles. Install wheels on tailwheel weldment securing with roll pins.

I. Install lift pins and spacers according to Fig. 5-3. Fasten lift pin with klick pin.

J. Attach clutch shield to gearbox as shown in exploded drawing in Figure 5-6.

K.Remove pivot bolt from spline end of clutch. Remove inspection cover from clutch shield.

L.Slide clutch onto gearbox input shaft aligning bolt hole with slot in input shaft. Fasten with pivot bolt, lockwasher and nut. Torque to 30 ft./lbs.

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

N.With tractor at idle speed, engage tractor PTO drive 2-3 seconds. Clutch should slip with- out turning blades.

O.Retighten nuts to original position. If adjust- ment is necessary, refer to Section 4-6.

WARNING

OVER-TIGHTENING SPRING NUTS MAY CAUSE DAMAGE TO IMPLEMENT AND/OR TRACTOR DUE TO INCORRECT SLIP CLUTCH TORQUE SETTING. ALWAYS FOLLOW THE PROPER ADJUSTMENT PROCEDURE.

P.Fill gearbox with EP80W-90 gear oil to check plug on rear of gearbox. Allow time for oil to seep through bearings into lower housing. Replace temporary plug with vent plug supplied in operator’s manual package.

Figure 5-2 Model 287 Clutch Shield

Dual Tailwheel Bracket

Lift Pins

Tailwheel Assembly
	Rear Safety Chains
		Hydraulic Cylinder
				Driveline
		(Or Ratchet Adjuster)
			Figure 5-3 Front View of Model 287 Lower Hitch Points

Category I	Category II
(2-7/8” Spacer not used on Cat. I)	2-7/8” x 1-1/8” Spacer
2-3/4” x 1-1/2” Spacer Used	2-3/4” x 1-1/2” Spacer

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