Walker MDD (20.9 HP) - Manual (Page 81)

77
Maintenance Instructions REPLACING/REPAIRING/
ADJUSTMENTS
4. Reinstall the solenoid. At this point, move the
solenoid linkage by hand and check for any
binding or dragging of the solenoid plunger and
linkage. If the solenoid does not move freely,
adjust the solenoid mounting position by bend-
ing the mount and/or loosening the mounting
bolts. The solenoid must move freely for proper
operation.
5. Refer to ADJUSTMENTS of Fuel Valve Sole-
noid Linkage in this section and make the fuel
valve linkage adjustment for the 1/16 in. (1.6
mm) air gap with injector pump stop.
6. Reinstall the engine air intake hose. Make sure
the hose clamps are tight and the hose is se-
cure.
ADJUSTMENTS
Safety Switches
There are three (3) safety interlock switches on the
tractor; Seat Switch, FSC Neutral - Park Switch, and
PTO Switch.
If any of the following conditions occur during start-
ing or operating, a safety interlock switch may be
malfunctioning. Contact your Walker dealer for trou-
bleshooting and/or replacement.
Slight adjustments can be made by carefully bend-
ing the leaf switch up or down as needed.
•
With an operator in the seat, the engine starts
with the Forward Speed Control (FSC) and/or the
PTO engaged.
•
With an operator in the seat, the engine starts but
dies soon after the Forward Speed Control (FSC) or
PTO is engaged.
•
Without an operator on the seat, the engine starts
and continues to run with the Forward Speed Con-
trol (FSC) and/or PTO engaged.
•
With an operator in the seat, the Forward Speed
Control (FSC) and PTO disengaged and panel horn
works, but the starter is not engaging.
Tail Wheel Bearing Preload
Preload the tail wheel bearings by tightening the ax-
le nut until the wheel begins to tighten as it turns (not
spin freely), then loosen the nut 1/2 to 1 turn. The
wheel should spin freely without excessive end play.
Lock the axle nut with the set screw in the nut.
Steering Levers
An adjustment range of approximately 3 inches is
available on the steering levers - the levers can be
adjusted forward or aft depending on the arm length
of the operator. The levers can be adjusted by loos-
ening the locknut at the pivot point and the locknut
holding the lever in position in the adjustment slide.
Adjust levers into most comfortable position and
tighten both locknuts.
Steering Lever Adjustment
DANGER
If the engine must be running to perform
a maintenance adjustment, keep hands,
feet, and clothing from moving parts. DO
NOT wear jewelry or loose clothing.
Adjustment
Slide
Locknut
(Pivot Point)
Locknut
(Position)