Important: Allo w engine to idle f or 5
min utes bef or e shutting it of f after a full
load operation. F ailur e to do so may lead to
turbo-charger tr ouble.
Checking the Interlock
Switches
If safety inter lock s witches ar e disconnected
or dama ged the machine could operate
unexpectedl y causing per sonal injur y .
• Do not tamper with the inter lock
s witches.
• Check the operation of the inter lock
s witches dail y and r eplace an y dama ged
s witches bef or e operating the machine.
• R eplace s witches ev er y tw o y ear s or 1500
hour s, whichev er occur s fir st, r egardless
of whether they ar e operating pr oper l y
or not.
T he mac hine has interloc k switc hes in the electrical
system. T hese switc hes are designed to stop the
engine when operator g ets off of the seat when the
traction pedal is de pressed. Ho w ev er , the operator
ma y g et off of the seat while the engine is r unning
and the traction pedal is in neutral. Although the
engine will contin ue to r un if the PTO lev er is
diseng ag ed and the traction pedal is released, it is
strongly recommended that the engine be stopped
before rising from the seat.
T o c hec k the operation of the interloc k switc hes ,
perfor m the follo wing procedure:
1. Dri v e the mac hine slo wly to a larg e , relati v ely
open area. Lo w er the cutting unit, stop the
engine , and apply the parking brak e .
2. Sit on the seat and de press the traction pedal.
T r y to star t the engine . T he engine should
not crank. If the engine cranks , there is a
malfunction in the interloc k system that should
be cor rected before beginning operation.
3. Sit on the seat and star t the engine . Rise from
the seat and mo v e the PTO lev er to On. T he
PTO should not eng ag e . If the PTO eng ag es ,
there is a malfunction in the interloc k system
that should be cor rected before beginning
operation.
4. Sit on the seat, eng ag e the parking brak e and
star t the engine . Mo v e the traction pedal out
of the neutral position. T he engine should
kill. If the engine does not kill, there is a
malfunction in the interloc k system that should
be cor rected before beginning operation.
5. Sit on the seat, star t the engine and set speed
rang e to lo w . Mo v e PTO switc h forw ard to
eng ag e cutting units .
Important: T he center lift lev er must
momentaril y be pushed to the lo w er
position to ena ble PT O circuit actuation
by PT O s witch.
• Raise either wing cutting unit to the transpor t
position. T he cutting unit should tur n off .
If the cutting unit does not stop , there is a
malfunction in the interloc k system that should
be cor rected before resuming operation.
• If the cutting unit is lo w ered ag ain the motor
should re-star t. If the cutting unit does not
re-star t, there is a malfunction in the interloc k
system that should be cor rected before
resuming operation.
• Raise the center cutting unit to the transpor t
position. All the cutting units should stop
r unning and not re-eng ag e when lo w ered to the
g round. If the cutting unit does not stop when
it is raised or if it re-star ts when it is lo w ered,
there is a malfunction in the interloc k system
that should be cor rected before resuming
operation.
• With the cutting units eng ag ed, switc h the
speed rang e from lo w to high. T he cutting
units should stop . If the cutting units do not
stop , there is a malfunction in the interloc k
system that should be cor rected before
resuming operation.
• If the operator rises from the seat with the
cutting units eng ag ed and/or the traction pedal
out of neutral, the cutting units m ust stop in
appro ximately one second and engine m ust
shutdo wn in appro ximately tw o seconds . If
the cutting units do not stop and the engine
does not shutdo wn, there is a malfunction in
the interloc k system that should be cor rected
before resuming operation.
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