Hustler Turf ATZ - Manual (Page 14)

Safety start interlock system
The tractor is equipped with a safety start interlock system consisting of
the park brake switches, seat switch, and deck clutch switch.
Check tractor safety start interlock system daily, prior to
operation. This system is an important tractor safety feature. It should be
repaired immediately if it malfunctions. The machine incorporates a
separate seat switch which will stop the tractor engine when the operator is
unseated for any reason while the tractor is operating. This is a safety
feature designed to prevent runaway or accidental entanglement. To inspect
the system:
1. The operator must be on the seat when testing the seat switch.
2. Set both control levers in the park brake position.
3. Start the engine and allow it to warm up to operating temperature.
4. With the deck clutch switch down and the control levers in the park
brake position, slowly raise off of the seat. The engine should
continue to run.
5. With the deck clutch switch up and/or the control levers in the
neutral position, slowly raise off of the seat. The engine should
stop.
6. If the engine fails to stop when the deck clutch switch is up or one
or both of the control levers is up and the operator is off the seat,
check the function of the seat switch. If the seat switch is not
operating properly (is not opening or closing) and if the cause can
not be determined, replace the seat switch.
If the problem can not be located, contact your Hustler Dealer.
WARNING: The safety interlock system should always
function per steps 4 and 5. If it does not function properly, it
should be corrected immediately. Do not operate machine
without properly functioning seat safety switch.
Engine (gasoline) starting
The tractor’s safety start interlock system is also designed to protect the
operator and others from accidental injury due to unintentional engine
starting. The engine starting motor will not engage until:
A. Control levers are in the park brake position.
B. Deck clutch switch is in the down (OFF) position.
WARNING: The safety interlock system must not be
disconnected or bypassed. Doing so could cause the machine
to operate unexpectedly resulting in personal injury.
NOTE: The operator’s seat is equipped with a separate safety switch.
If for any reason the operator should become unseated when the control
levers are not in the park brake position (park brake switches are
disengaged) or the deck clutch switch is engaged the engine will stop.
The following steps are the correct procedures for starting the engine.
If difficulty is encountered, contact the Hustler Dealer in your area.
1. Before starting tractor each day, perform daily pre-operation
checking. (See Safety start interlock system section)
2. Make sure the control levers are in the park brake position and deck
clutch switch is disengaged. Only start the engine from the
operator’s position.
3. Use choke, if unit is equipped with one, when engine is cold, or if
warm engine fails to start within 5 seconds of cranking. Avoid
flooding and operate engine without choking as soon as possible.
4. Set throttle at approximately 1/2 open position.
5. Insert key in ignition switch and rotate full clockwise to engage
starting motor. Release key when engine starts.
IMPORTANT: The engine starter should not be operated for periods
longer than 30 seconds at a time. An interval of at least two minutes should
be allowed between such cranking periods to protect the starter from
overheating and burn-out.
6. Perform test to make sure safety start interlock system is operating
properly. Refer to Safety start interlock system section.
7. As soon as engine begins to run, check to make certain the oil
warning light, check engine light and alternator warning light (if
applicable) are off. If not, stop engine immediately and check for
the cause.
8. Allow the engine to idle a few minutes before advancing the throttle
and/or engaging the deck clutch.
Engine (diesel) starting
The Hustler Z Shibaura Diesel safety start interlock system is designed
to protect the operator and others from accidental injury due to
unintentional engine starting. The engine starting motor will not engage
until:
A. Control levers are in the park brake position.
B. Deck clutch switch is in the down (OFF) position.
WARNING: The safety interlock system must not be
disconnected or bypassed. Doing so could cause the machine
to operate unexpectedly resulting in personal injury.
NOTE: The operator’s seat is equipped with a separate safety switch.
If for any reason the operator should become unseated when the brake
switches are disengaged or the deck clutch switch is engaged the engine
will stop.
The following steps are the correct procedures for starting the engine.
If difficulty is encountered, contact the Hustler Dealer in your area.
1. Before starting tractor each day, perform daily pre-operation
checking.
2. Make sure the control levers are in the park brake position and deck
clutch switch is disengaged. Only start the engine from the
operator’s position.
3. Set throttle at approximately 1/2 open position.
4. Insert key in ignition switch and rotate it to the “PRE-HEAT/RUN”
position. It takes two seconds before the glo-plug light will come on.
Wait for the glo-plug light to go off (approximately 6 seconds)
before rotating the key to the “START” position. This is necessary
only when the temperature is below 50o F. This operation is not
necessary when restarting a warm engine.
Shown in the chart are the standard preheating times for various
temperatures. This operation, however, is not required when the
engine is warmed up.
Failure to follow these recommendations can lead to premature
failure of the starter motor and the fuel shut-off solenoid.
NOTICE: Ether, or other starting fluids, must never be used as a
starting aid with this engine. Warranty will be denied when
engine damage results from such use.
5. Rotate ignition switch key full clockwise to engage starting motor.
Release key when engine starts.
IMPORTANT: The engine starter should not be operated for periods
longer than 30 seconds at a time. An interval of at least two minutes should
be allowed between such cranking periods to protect the starter from
overheating and burn-out.
6. Perform test to make sure safety start interlock system is operating
properly. Refer to Safety start interlock system section.
7. As soon as engine begins to run, check to make certain the oil
warning light is off. If not, stop engine immediately and check for
the cause.
8. Allow the engine to idle a few minutes before advancing the throttle
and/or engaging the deck clutch.
Stopping the engine
Use the following procedure to shut off the engine after operating the
equipment.
1. Place the control levers in the park brake position
2. Disengage the deck clutch
3. Throttle back to low idle for a couple of minutes
4. Rotate ignition key counter-clockwise to the “OFF” position.
Remove the key from switch before leaving the tractor.
Ambient Preheating time
temperature Ordinary heat type
Above 10°C (50°F) No Need
10°C (50°F) to Approx. 6 seconds
-5°C (23°F)
Below -5°C (23°F) Approx. 12 seconds
Limit of
continuous use
20 seconds
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