Bush Hog Parts and Installation Guide for ATH 600, ATH 720, and FTH 600 Models

D. Loosely attach two caster arms to the front of the mower deck using 5/8 x 3-1/2” bolts, lockwash- ers and hex nuts. Install reinforcement plates between bolt heads and caster arms. Loosely attach the remaining two caster arms to the rear of the mower deck using 5/8 x 3-1/2” bolts, lockwashers and hex nuts in each caster arm. Attach mast sup- ports to the rear of the mower deck at rearholes of caster arms using 5/8” x 4” bolts, lockwashers and hex nuts. (Figure 5-1) Fasteners will be tightened after caster wheels are installed.

E. Fasten mast supports and upper flex link to mast halves using 1/2 x 5” capscrew, pivot tube and locknut..

F. Place two long spacers on the caster stems and insert into caster arms. Place two long spacers and two short spacers on the caster stem above the caster arms. This arrangement will give a cutting height of approximately three inches. Secure with lynch pin retainers. With weight of cutter resting on all four wheels, ensure that cutter is level. Tighten all bolts on mounting brackets.

Figure 5-2

(ATH MODELS)

Retainer

Roller Shaft

Roller

Roller Mount R.H.

G. If front roller is purchased, (ATH MODELS) Install by securing the right and left roller mounts to the deck in the holes provided by using 3/8 x 1-1/4” carriage bolts, flatwashers, lockwashers and hex nuts. Install bolts with heads to inside of deck. (Figure 5-2) Assemble roller, roller shaft, retainer and roll pin as shown in Figure 5-2.

If front roller is purchased, (FTH MODELS) Install by securing the right and left roller mounts to the deck in the holes provided by using 3/8 x 1-1/4” carriage bolts, flatwashers, lockwashers and hex nuts. Install bolts with heads to inside of deck. (Figure 5-2A) Assemble roller, roller sleeve, 1/2” x 6- 1/2” capscrew, 3/4” flatwashers and 1/2” locknut as shown in Figure 5-2A.

H. Fill gearbox with EP80W-90 gear oil until oil level is at check plug on side of gearbox housing. (Capacity is 1 quart) Replace solid fill plug with breather plug supplied in operator’s manual pack- age.

3/8” x 1 1⁄4” Carriage Bolts

3/8” Flatwashers

3/8” Lockwashers

3/8” Hex Nuts

Roller Mount L.H.

Roll Pin

Figure 5-2A

(FTH MODELS)

Roller Mount R.H.

3/8” x 1 1⁄4” Carriage Bolts

3/8” Flatwashers

3/8” Lockwashers

3/8” Hex Nuts

3/4” Flatwashers. Roller Mount L.H.

		1/2” x 6	1⁄2” Capscrew
Roller		1/2” Lock Nut
		Roller Sleeve
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