HUSTLER Z Diesel General Service Manual page 15

To keep the pumps from bottoming out internally use
the following procedure:
This adjustment is only required if the hydraulic pump(s)
have been replaced.
Pump damage will occur if these stops are set
incorrectly.
1. To make the first adjustment the tractor engine must
not be running.
2. Check to make sure the steering control levers are
against the stops before the pumps are bottomed out
internally.
3. To do this, gently and slowly move the steering control
levers forward and feel if there is some resistance on
the pump lever before the control levers hit the stops.
Check one side at a time. If you sense that the pump
arms are stopping the forward motion of the control
arms, loosen the jam nut on the adjustable stop of the
corresponding side, turn the stop (set screw) inward to
stop the steering control levers slightly before the
pump bottoms out. Lock in place when the adjustment
is correct by re-tightening the jam nut. Do this for each
side.
A. Stop screw
Figure 4-5
To adjust the stops for driving straight when steering
control levers are against the stops during operation:
1. Determine which drive tire is rotating too fast when
both steering control levers are against the stops in
the control panel. Figure 4-6
2. Then, stop the tractor and loosen the lock nut on the
side which is rotating too fast and turn the stop (set
screw) inward to stop the steering control lever
115164
sooner. Tighten the lock nut on the stop and test
again.
3. Repeat this procedure until unit drives straight.
NOTE: Since this is a hydrostatic drive, variables such as
temperature of oil, efficiency of pumps and motors, tire
pressure etc. may effect the consistency of the ability to rely on
the stops to drive straight without the operator making minor
steering adjustments with the control arms.
A. Steering control lever
A
B. Stop
Steering damper
The steering dampers are spring loaded to return the
control levers to the neutral position from the reverse
position. This gives the operator a sense of neutral during
operation.
To set the steering dampers in the correct operating
position follow these steps:
1. Shut engine off, place steering control levers in the
park brake position, disengage deck clutch, remove
ignition switch key and disconnect negative battery
cable before doing any adjustments.
2. Place the steering control lever in the park brake
position. Figure 4-7
3. Loosen the steering damper's rear ball stud. Figure 4-8
& Figure 4-9
4. Pull the damper spring housing past the point that the
internal spring is engaged. Figure 4-8 & Figure 4-9
5. Release the damper spring housing and allow the
internal spring to bring the housing back to the neutral
position.
4-3
C
A
C. Jam nut
Figure 4-6
B
REV D