Exmark Pioneer S-Series 0 - Manual (Page 39)

Maintenance
Figure 31
1. Control arm shaft 3. Tracking plate
2. Tracking plate screw
Motion Control Linkage
Adjustment
Located on either side of the unit, below the seat are
the pump control linkages. Rotating the turnbuckle
with a 1/2 inch wrench allows fine tuning adjustments
so that the machine does not move in neutral. Any
adjustments should be made for neutral positioning
only.
WARNING
Engine must be running and drive wheels must
be turning so adjustments can be performed.
Contact with moving parts or hot surfaces may
cause personal injury.
Keep fingers, hands, and clothing clear of
rotating components and hot surfaces.
1. Prior to starting the engine, push the deck lift
pedal and remove the height of cut pin. Lower
deck to the ground.
2. Raise the rear of machine up and support with
jack stands (or equivalent support) just high
enough to allow drive wheels to turn freely.
3. Remove the electrical connection from the seat
safety switch, located under the bottom cushion
of the seat. The switch is a part of the seat
assembly.
4. Temporarily install a jumper wire across the
terminals in the connector of the main wiring
harness.
5. Start engine. Brake must be engaged and
motion control levers out to start engine.
Operator does not have to be in the seat. Run
engine at full throttle and release brake.
6. Run the unit at least 5 minutes with the drive
levers at full forward speed to bring hydraulic oil
up to operating temperature.
Note: The motion control lever needs to be in
neutral while making any necessary adjustments.
7. Bring the motion control levers into the neutral
position. The control plate tabs should touch the
return to neutral plates on the hydros. Adjust
pump control rod lengths by loosening the nuts
and rotating the turnbuckle in the appropriate
direction until the wheels slightly creep in reverse
(Figure 32). Move the motion control levers to the
reverse position and while applying slight pressure
to the lever allow the reverse indicator springs to
bring the levers back to neutral. The wheels must
stop turning or slightly creep in reverse.
Figure 32
1. Nut 4. Control plate
2. Turnbuckle 5. Return to neutral plate
3. Stationary plate 6. Tabs touching return to
neutral plate
8. Tighten nuts.
9. Shut off unit. Remove jumper wire from wire
harness and plug connector into seat switch.
10. Remove the jack stands.
39