605046
3-5
REV A
Lights
The BigDog
®
Alpha MP comes equipped with operating
lights mounted in the front mower frame. There is no dedicated
“ON/OFF” switch for these lights. These lights come on when
the ignition switch is in the “RUN” position and go off when the
ignition switch is in the “OFF” position. Figure 3-5
Safety Start Interlock System
The mower is equipped with a safety start interlock system
consisting of the park brake switches, seat switch, and deck
clutch switch.
Check the mower’s safety start interlock system daily,
prior to operation.
This system is an important mower safety
feature. It should be repaired immediately if it malfunctions.
The machine incorporates a separate seat switch which will stop
the engine when the operator is unseated for any reason while
the mower 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 steering 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 steering
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 steering 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 steering 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 cannot be located, contact your BigDog
®
Mowers Dealer.
Engine Starting
The mower’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:
1.
Steering control levers are in the park brake position.
2.
Deck clutch switch is in the down (OFF) position.
NOTE:
The operator’s seat is equipped with a separate
safety switch. If for any reason the operator should become
unseated when the steering 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 BigDog
®
Mowers Dealer in your area.
1.
Before starting mower each day, perform daily pre-
operation checking. (See
Safety Start Interlock System
section.)
2.
Make sure the steering control levers are in the park
brake position and deck clutch switch is disengaged.
Only start the engine from the operator’s position.
Figure 3-4
Figure 3-5
Deck lift pedal
Lights
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 a
properly functioning seat safety switch.
WARNING
The safety interlock system must not be disconnected or
bypassed. Doing so could cause the machine to operate
unexpectedly resulting in personal injury.
