John Deere GT2554 - Manual (Page 18)

Operating - 14
OPERATING
Testing Park Brake Switch
1. Operator on seat.
MX13483
2. Unlock park brake (A).
3. Push PTO switch (B) down to disengage.
4. Try to start engine.
Result: Engine must not start. If engine starts, there is a
problem with safety interlock circuit.
Testing PTO Switch
1. Operator on seat.
MX13483
2. Lock park brake (A).
3. Pull PTO switch (B) up to engage.
4. Try to start engine.
Result: Engine must not start. If engine starts, there is a
problem with safety interlock circuit.
Testing Seat Switch and PTO Switch
1. Operator on seat.
2. Lock park brake.
MX13482
3. Push PTO switch (A) down to disengage.
4. Start engine and move throttle lever (B) to half-speed
position.
5. Pull PTO switch (A) up to engage.
6. Move throttle lever (B) to fast speed position.
7. Raise up off of seat. Do not get off machine.
Result: Engine must stop. If engine does not stop, there is
a problem with safety interlock circuit.
Testing Seat Switch and Brake Switch
1. Operator on seat.
2. Push brake pedal down.
MX13483
3. Push PTO switch (A) down to disengage.
4. Release forward travel pedal (B) to N (neutral) position.
5. Start engine and move throttle lever (C) to fast speed
position.
6. Release brake slowly.
7. Raise up off of seat. Do not get off machine.
Result: Engine must stop. If engine does not stop, there is
a problem with safety interlock circuit.
B
A
B
A
A B
B
A
C