Bush Hog ATH 900 Lawn Mower User 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-
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 5-6
Figure 5-6A
Roller
L.H. Mount
Bracket
L.H. Mount
Bracket
R.H. Mount
Bracket
R.H. Mount
Bracket
3/8” x 1-1/4” Carriage Bolt
3/8” Flatwasher
3/8” Lockwasher
3/8” Hex Nut
1/4” x 1” Carriage Bolt
1/4” Flatwasher
1/4” Lockwasher
1/4” Hex Nut
3/4” Flatwashers
1/4” x 2-1/2” Cotter Pin
3/16” x 2”
Roll Pin
Roller
14