Bush Hog ATH 900 manual

C. Install lift pins onto lower links, securing with 7/8 lockwashers and hex nuts.

D. Remove caster arms by removing eight (8) 5/8 x 4 bolts, lockwashers and nuts securing them to the deck assembly. Slide caster arms, in channel, toward rear of machine until holes in rear of caster arm align with holes in rear of mounting channel. Secure caster arms (2) and caster arm mounts (2 front, 2 rear) to front and rear of channel using 5/8 x 4 bolts, lockwashers and hex nuts previously removed (Figure 5-3). Attach the two (2) mast sup- ports to the inside of the channels at the top, rear hole in each channel, also with the hardware previ- ously removed (Figure 5-3). Secure the caster arm mounts (2 front, 2 rear) to the deck with 1/2 x 1 bolts, lockwashers and hex nuts provided (Figure 5- 4).E. Swing mast halves upward into position so that they align with mast supports from rear of machine. Fasten mast supports and upper flex link to mast halves using 5/8 x 6 bolt, 2-5/8 pivot tube and lock-

Figure 5-6

nut (Figure 5-5).

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 caster stems with lynch pin retainers. With the weight of cutter resting on all four wheels, be sure that cutter is level.

G. If front roller option is purchased, install by securing the roller mounts to the deck in the holes provided by using 3/8 x 1-1/4 carriage bolts, flat- washers, lockwashers and hex nuts provided. Install bolts with heads to inside of deck. Assemble rollers, roller shaft, retaining pin and roll pin as shown in Figure 5-6 and 5-6A.

H. Fill gearbox with EP80W-90 gear oil unti oil level is at check plug on front of gearbox housing.

Figure 5-6A
3/8” x 1-1/4” Carriage Bolt	L.H. Mount
3/8” Flatwasher
3/8” Lockwasher	Bracket	3/16” x 2”
3/8” Hex Nut		Roll Pin

R.H. Mount

Bracket

R.H. Mount	Roller	L.H. Mount	Roller
Bracket		Bracket	3/4” Flatwashers
			1/4” x 2-1/2” Cotter Pin
			1/4” x 1” Carriage Bolt
			1/4” Flatwasher
			1/4” Lockwasher
			1/4” Hex Nut

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