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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Replacing Fuel Valve Solenoid - Model MD
For checking operation of the solenoid, refer to
CHECKING/SERVICING the Fuel Valve Solenoid in
the Maintenance Instructions Section. To replace
the solenoid:
1. Remove the engine air intake hose for access to
the solenoid.
Fuel Valve Solenoid Replacement
2. Disconnect the electrical plug, remove the two (2)
mounting bolts and the cotter pin on the linkage,
then remove the solenoid.
3. Unscrew the linkage rod out of the old solenoid and
reinstall in the new solenoid. Leave the jam nut on
the linkage rod loose.
4. Reinstall the solenoid. At this point, move the so-
lenoid 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 bending the mount and/or
loosening the mounting bolts. The solenoid must
move freely for proper operation.
5. Refer to ADJUSTMENTS of Fuel Valve Solenoid
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 secure.
REPLACING/REPAIRING - IMPLEMENTS
Perfaerator
Tine Ends
Tine ends are replaceable by using the following proce-
dure:
1. Loosen the retaining nut on the tine thread and un-
screw tine end.
Tine End Replacement
2. Install new tine end by reversing the removal pro-
cedure. Open side of tine should be to rear.
1/4 SAE Washer
Solenoid
Linkage
Cotter Pin
1/4-20x5/8 Hex Bolt
1/4x5/8x1/8 Washer
1/4-20 Keps Nut
1/4-28 Hex Nut
CAUTION
ALWAYS use genuine factory replacement
parts. Substitute parts CAN result in prod-
uct malfunction and possible injury to the
operator and/or others.
WARNING
DO NOT attempt to make any replace-
ments or repairs with the tractor engine
running. Disengage the PTO clutch, shut
off the machine, and remove the ignition
key. Wait for all movement to stop before
getting off the seat.
Retaining
Nut
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