Ariens 931000 - Manuel (Page 13)

ADJUSTMENTS/ MAINTENANCE
HYDROSTATIC CONTROL ADJUSTMENT
f the tractor creeps when the Hydrostatic Control Lever is in the
"NEUTRAL” (N) position, see your Ariens dealer for adjust­
ment.
CONTROL LEVER FRICTION ADJUSTMENT
The hydrostatic friction plates, shown in Figure 18, must be ad­
justed so the Control Lever moves through the "FORWARD” and
"REVERSE" modes with a minimum of force. The friction plates
must remain parallel for proper adjustment. However, there must
be sufficient spring pressure on the friction plates so that under
normal operating conditions, the Hydrostatic Control Lever will
remain at any selected setting.
If the tractor has a tendency to slow down or speed up without
touching the Hydrostatic Control Lever, it wiil be necessary to in­
crease the spring pressure on the friction plates by tightening
the screws at "A" and "B", Figure 18. Friction piates must re­
main parallel. Check parallelism and adjust screws equally. Ac­
cess to these screws can be gained by raising the rear deck of
the tractor and inserting a screw driver through the access holes
as shown.
If the tractor has a tendency to speed up, tighten screw "A”
slightly more than screw ■"B".
If the tractor has a tendency to slow down, tighten screw "B”
l^l^lightly more than screw "A”.
HYDROSTATIC
CONTROL
FORK
HYDROSTATIC CONTROL LEVER
FRICTION PLATES
CONTROL CONSOLE
REMOVED
FOR CLARITY
SCREW
DRIVER
FIGURE 18
PARK LOCK MAINTENANCE AND ADJUSTMENT
When the Hydrostatic Control Lever is placed in the
“PARK/START" position, the cable shown in Figure 19 is push­
ed out the cable housing causing the pivot plate to rotate in the
direction of the arrow. This results in the park-lock pin engaging
,n a reduction gear in the differential housing which locks the
differential. When the Control Lever is moved forward, the pivot
plate rotates opposite to the direction of the arrow shown in
Figure 19, and the park-lock pin disengages from the reduction
gear thus unlocking the differential.
The park-lock mechanism should be kept clean of any dirt or
grass build-up and the moving parts should be oiled occasionally
to assure that the park-lock functions properly.
The park-lock mechanism Is properly adjusted when the over­
center pivot plate. Figure 19 actuates at Point "C", Figure 20
(approximately 1/2 to 2/3 the length of the slot on the console
cover), as the Hydrostatic Control Lever is moved from the front
of the slot back into the "PARK/SLOT” position. A distinct
"click” can be heard when the over-center latch actuates.
When the mechanism is properiy adjusted, the park-lock pin will
engage the teeth of the reduction gear when the Hydrostatic Con­
trol Lever reaches Point "B", Figure 20, and the pin will be
completely disengaged at Point "A".
Adjustment is made by loosening nuts "A”, Figure 19, and
moving the cable housing "IN" or "OUT” until the over-center
latch actuates when the Hydrostatic Control Lever reaches Point
C, Figure 20, as the lever is moved from the front of the slot,
rear-ward into the "PARK/START" position. Moving the cable
housing "IN” toward the tractor causes the park-lock pin to
engage later. Moving it "OUT'' away from the tractor causes the
pin to engage earlier in the reduction gear.
FAST
X
SLOW
PARK LOCK DISENGAGES j 5]
OVERCENTER LATCH
ACTUATES
PARK LOCK ENGAGES
©
©
W
PARK
START
W
FIGURE 20
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