Ariens HYDROSTATIC S-12 - Hydraulic Lift Operation

REAR WHEEL TREAP ADJUSTMENT
The rear wheels are normally assembled in the narrow
tread position, shown in Figure 25. The wheels can be turned
on the hubs for a wider tread. The wide tread provides greater
stability on hillsides and o.n rough terrain.
Remove the wheel lug nuts, turn the wheels around with
the valve stems inward and re-assemble on the hub.
FIGURE 25
The center rock shaft flotation spring provides mower
flotation. The tension on the spring can be increased by pulling
the Chain shown in Figure 26 and latching a Chain link in the
notch in the back of the tractor frame. This spring should
aiways be in use when the mower pan is used.
CAUTION • INHEN ADJUSTING CHAIN TENSION ALWAYS 6RASP
CHAIN HANDLE FIRMLY (NOT THE CHAINI AS CONSIDERABLE TENSION
IS ON THE CHAIN AND INJURY TO THE HANOS COULD RESULT.
If Chevron tread tires are used, remove the wheel lug
nuts and re-assemble the wheels on opposite sides of the
tractor with the valve stems turned inward. I nterchanging
' the wheels is necessary to maintain proper direction of
rotation for traction tires.
HYDRAULIC LIFT OPERATION
The hydraulic Control lever is located on the control
console, shown in Figure 2. It is a four position lever to per¬
form four functions, UP, HOLD, DOWN and FLOAT. The
normal out-of-use position is. the "HOLD" position and
the attachment will not lower or raise. When it is desired to
raise the attachment, the lever is pulled to the "UP" po¬
sition and the cylinder is actuated to lift the attachment.
When the léver is moved to the "DOWN" position, the oil
pressure in the cylinder is reversed and the cylinder forces
the attachment down.
HYDRAULIC LIFT REAR ROCK SHAFT
The tractor comes with a lift selector device so that
the front and center rock shafts can be operated in-
dependently of the rear rock shaft While utilizing only one
hydraulic cylinder. The alterriately latched, split lift linkage
system holds thé front ånd center rock shafts in their raised
positions while the rear rock shaft is operated by the cylinder
or vice versa. This allows a rear mounted attachment to be
used without renribying the front pr center mounted attach-
ments and vice versai^
To make the rear rock shaft operational, move the hy¬
draulic Control lever to the "UP" position and hold it there
until the cylinder is fully extended. Place the selector knob in
the front notch (Figure 27).
To make the front and center rock shafts operational,
move the hydraulic control lever to the "UP" position and
hold it there until the cylinder is fully extended. Place the
selector knob in the rear notch as shown in Figure 27.
When an attachment iS being used which is designed to fol-
low ground contours, the lever should be placed in the
"FLOAT" position.- The cylinder is then free to move as the
attachment position requires.
Figure 28 shovys the components of the hydraulic lift
system. The hydrostatic transmission charge purnp supplies
the oil flow from the rear axie transmission oil reservoir. Oil
flow to and from the cylinder is controlled by the valve. The
back end of the cylinder is anchored to the rear rock shaft.
The forward end of the cylinder is pinned to the lower end
of the beil crank.
When the cylinder is extended or retracted, the beil crank
pivots and raises or lowers both the front and center rock
shafts at thé same time through the front and center rock
shaft linkages shown in Figure 28. The connection to the
center rock shaft is made through the slotted hole which allows
the center rock shaft to move up and down, allowing the
mower to Ilpat independent of the flotation provision in
the hydraulic system.
IN REAR NOTCH - FRONT AND CENTER ROCKSHAFTS
FIGURE 27
-14-