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4.1.4 Check safety interlock system.
Service Interval: Daily
a) Check starting circuit:
Starter should crank with, parking brake engaged, PTO disengaged and
motion control levers moved out in the neutral lock position. The operator
does not need to be in the seat to start the engine.
Try to start with operator in seat, parking brake disengaged, PTO
disengaged and motion control levers in the neutral lock position - starter
must not crank.
Try to start with operator in seat, parking brake engaged, PTO engaged and
motion control levers in the neutral lock position - starter must not crank.
Try to start with operator in seat, parking brake engaged, PTO
disengaged, and the left motion control lever in, starter must not
crank, repeat again with the right lever in, then with both levers in -
starter must not crank.
b) Check the kill circuits:
Run engine at one-third throttle, disengage parking brake and raise off of
seat (but do not get off of machine) engine must stop after approx. 1/2
second has elapsed (seat has time delay kill switch to prevent cut-outs on
rough terrain).
Run engine at one-third throttle, engage PTO and raise off of seat (but do
not get off of machine) engine must stop after 1/2 second has elapsed.
Run engine at one-third throttle, with brake disengaged, move levers in and
rise off seat (but do not get off of machine) engine must stop after 1/2
second has elapsed.
Again, run engine at one-third throttle, brake engaged, and move left
motion control lever in - engine must stop.
Repeat again moving the right lever in, then moving both levers in -
engine must stop whether operator is on seat or not.
c) Check the PTO circuit:
See the FR524 and FR604 Operator’s manual to become familiar with the
deck operation. Open the folding deck latches, disengage the park brake,
move the motion control levers in to neutral, and disengage the PTO.
Lower the deck until the PTO switch arm is no longer depressing the PTO
“kill” switch. See Figure 3.
FIGURE 3