Stopping The Machine - Walker D21d Operator's Manual

Operating Instructions
If the cutting blades strike a stationary ob-
ject while mowing, stop the mower imme-
diately, disconnect the electrical plug on
the fuel shut-off solenoid, lift the deck, and
inspect the deck and blades thoroughly for
damage. Make sure that the blade timing
has not been disturbed (the blades should
be at 90 degrees to each other). Refer to
REPLACING/REPAIRING the Blade Over-
load Shear Bolts in Maintenance Instructions
if blades are out of time. Also, make sure
the blade retaining nuts are torqued to
60 lb·ft (81 N·m).

STOPPING THE MACHINE

1. Pull the steering levers to the NEUTRAL posi­
tion and then move the FSC lever backward to
the NEUTRAL-PARK position.
2. Slow the engine to a fast idle; put the throttle in
the 1/2 throttle position.
3. Disengage the blade clutch.
IMPORTANT:
clutch with high engine speed (above 1/2 throt-
tle) since the brake action on the blade drive will
cause premature wear of the brake band.
A brake stops the cutter blades (and
blower on GHS equipped models) from
freewheeling within five (5) seconds after
disengaging the clutch. If the brake sys-
tem malfunctions and the blades do not
stop within five (5) seconds, the brake
should be adjusted or repaired before op-
erating the mower. Contact your Walker
dealer, or refer to ADJUSTMENTS of
Clutch Disengagement/Brake Action in
Maintenance Instructions.
CAUTION
DO NOT disengage the blade
WARNING
4. Slow the engine to Idle, put throttle in IDLE po­
sition; and turn the ignition switch OFF.
WARNING
Remove the key from the ignition switch
when leaving the mower unattended. This
will prevent children and inexperienced
operators from starting the engine.
5. Engage the parking brake.
IMPORTANT: The hydrostatic transmissions
lock to prevent the mower from rolling freely
with the engine stopped. However, if the mow­
er is parked on a slope, it is necessary to EN-
GAGE the parking BRAKE to prevent the
mower from creeping. This is due to a small
amount of slip page in the hydrostatic transmis­
sions, especially when transmission fluid is
warm. Also, engaging the parking brake is rec­
ommended when stopping or parking the ma­
chine in a confined space with little tolerance
for movement.
CAUTION
An operator presence switch (seat switch)
will cause the engine to stop if the parking
brake is in the DISENGAGED position and
the operator is not in the seat. The function
of this switch should be checked by the op-
erator raising off the seat with the parking
brake lever in the DISENGAGED position
(tractor not moving and blade clutch disen-
gaged); the engine should stop. NOTE: Al-
low 1/2 second "off the seat" for the time
delay function. If the safety sys tem is not
working, it should be repaired or replaced
before operating the mower. DO NOT dis-
connect the safety switches; they are for
the operator's protection.
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