How Does a PTO Switch Work？

What is PTO switch

The PTO switch, fully named the power take off switch is a switch to control the auxiliary power output device. It is composed of one or more sets of transmission gears, also known as a power output device, which is generally composed of a gearbox, a clutch, and a controller. It is connected to the low-grade gear of the gearbox or the output shaft of the auxiliary box and transfers the power to the external working device. It is often used in lifting pumps of large construction machinery such as excavators, refrigeration equipment, or tanker pumps.

How does a PTO switch work

So how does a PTO work? A steering switch is usually mounted on the steering wheel of construction machinery and is connected to the steering wheel shaft. Its design allows it to rotate along with the steering wheel. This means that when the driver turns the steering wheel, the steering switch rotates accordingly.

The inside of the steering switch contains a series of electrical contacts. These contacts are located at different points on the steering switch and correspond to the different directions and positions of rotation of the steering wheel. When the steering wheel is turned, the electrical contacts are connected or disconnected, thus generating different electrical signals.

The electrical signals generated are transmitted to the vehicle's electrical system via cables or wires. These signals usually reach the vehicle's Electronic Control Unit (ECU), which interprets and processes them.

The ECU will use the signals it receives to determine the driver's intent to operate the steering wheel. Specifically, it will detect the direction and magnitude of steering wheel rotation and then take appropriate measures to control the steering wheel steering of the vehicle. This includes controlling the steering of the vehicle's front wheels to steer the vehicle. That's all for how does a pto switch work.

How to use PTO switch

PTO is a switch control method, mainly used for speed and position control. Mainly used for motor speed and position control for the precise position, torque, and speed control in automation. PTO switch john deere is a typical and common PTO part in automatic machinery areas.

How to use: 1. The equipment is in gear. 2. Check that the brake and clutch plate are not depressed. 3. The vehicle speed is less than 5 km/h. When these conditions are met, short press RES or SET- to enter the cruise mode, and the cruise indicator lights up.

PTO switch has four operation modes: manual, pneumatic, electric, and hydraulic. It can be operated by the driver in the cab, and the PTO switch directly transmits instructions to the electronic control system.

When the PTO switch is engaged, it activates the external device's clutch (the mechanism that connects and disconnects engine power and mechanical components). When the PTO switch is released, it disconnects power to the external working device and stops working.

Test PTO Switch

Step 1: Whether the PTO switch is in good condition. Press the PTO switch continuously, there should be no stagnation.

Step 2: Remove the PTO switch and measure the voltage of the switch output terminal when the engine is powered on. When the switch is closed, there should be 24V voltage output. If there is no current, check the switch circuit.

Step 3: Check the receiving signal of the PTO switch pin. If there is a signal, it means that the remote throttle control conversion is normal. If there is no signal, check the line from the PTO switch output to the PTO switch pin.