3. Open the air bleed screw on the fuel injection
pump ( Figure 28 ).
Figure 28
1. Fuel injection pump bleed screw
4. T ur n the k ey in the ignition switc h to the On
position.
T he electric fuel pump will begin operation,
thereb y forcing air out around the air bleed
screw .
5. Lea v e the k ey in the On position until a solid
stream of fuel flo ws out around the screw .
6. Tighten the screw and tur n k ey to the Off
position.
Note: Nor mally , engine should star t after
abo v e bleeding procedures are follo w ed.
Ho w ev er , if engine does not star t, air ma y be
trapped betw een injection pump and injectors;
refer to Bleeding Air F rom the Injectors in
Fuel System Maintenance , pag e 45 .
Checking the Interlock
System
T he pur pose of the safety interloc k system is to
prev ent the engine from cranking or star ting unless
the traction pedal is in neutral and the PTO switc h
is in the Off position. In addition, the engine will
stop when:
• the PTO control is eng ag ed with the operator
off the seat;
• the traction pedal is de pressed with the
operator off the seat;
• the traction pedal de pressed with the parking
brak e eng ag ed.
If the 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
r egardless of whether they ar e operating
pr oper l y or not.
1. Mo v e PTO switc h to Off position and remo v e
foot from traction pedal so it is fully released.
2. R otate the ignition k ey to Star t. Engine should
crank. If engine cranks , proceed to ste p 3 .
If engine does not crank, there ma y be a
malfunction in the interloc k system.
3. Raise off the seat and eng ag e the PTO switc h
while the engine is r unning . T he engine should
stop within 2 seconds . If engine stops , the
switc h is operating cor rectly; thus , proceed
to ste p 4 . If engine does not stop , there is a
malfunction in the interloc k system.
4. Raise off the seat and de press the traction
pedal while engine is r unning and the PTO
lev er is diseng ag ed. T he engine should stop
within 2 seconds . If engine stops , the switc h is
operating cor rectly; thus , proceed to ste p 5 If
engine does not stop , there is a malfunction in
the interloc k system.
5. Eng ag e the parking brak e . De press the traction
pedal while engine is r unning and the PTO
lev er is diseng ag ed. T he engine should stop
within 2 seconds . If engine stops , the switc h is
operating cor rectly; thus , contin ue operation.
If engine does not stop , there is a malfunction
in the interloc k system.
Pushing or Towing the
Machine
In an emerg ency , the mac hine can be pushed or
to w ed for a v er y shor t distance . Ho w ev er , T oro
does not recommend this as standard procedure .
34
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