| 摘要 |
PURPOSE: An operation warning device of a PTO(Power Take Off) for a truck is provided to prevent an oil pump from sticking in operating the PTO continuously during traveling by lighting the lamp and operating a buzzer in operating the PTO normally in stopping the vehicle and actuating the buzzer periodically with the timer in traveling without turning off the PTO. CONSTITUTION: A clutch switch(1), an accelerator switch(2), a diode(D1), an exhaust valve(3) and an exhaust switch(4) are connected in series between a power terminal and a ground terminal, and an exhaust lamp(5) is installed between the power terminal and the connection point of the exhaust valve and the exhaust switch. A diode(D2), a PTO control relay(6) and a PTO operating switch(7) are connected in series between the connection point of the clutch switch and the accelerator switch and the ground terminal, and a contact point switch of the PTO control relay, a PTO valve(8), a PTO position sensor(11), a buzzer(9) and a lamp(10) are connected in parallel between the power terminal and the PTO operating switch. A timer(12) is installed in the buzzer to operate the buzzer for the predetermined time after resetting by power through the clutch switch and the diode.
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