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How to Unhook Semi Trailer?

Views: 6     Author: Site Editor     Publish Time: 2024-08-06      Origin: Site

A semi truck trailer is a trailer with the axle placed behind the center of gravity of the vehicle and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. Semi truck trailers have a broad development prospect and are widely used in carrying different materials. They are convenient for promoting container transportation and improving the organization of trailer transportation. So how to unhook the semi truck trailer? How should we operate to ensure safety? The following are some methods of separation and connection between semi trailers and tractors compiled by Jiahe's editor.

1. Methods of separating tractors and semi trailers

After the vehicle is parked, first plug the front and rear of the semi trailer tires with triangular wood or stones to prevent them from slipping, then lower the auxiliary support frame of the semi trailer to contact the ground, and further raise the front of the semi trailer slightly to relieve all the load on the saddle grinding wheel of the tractor; then unplug the joint of the brake pipeline and the plug of the light cable; finally open the locking mechanism of the saddle grinding wheel, so that the tractor can smoothly drive away from the semi trailer.

2. Methods of reconnecting the tractor and the semi trailer

The reverse procedure of separation can be used. Before connecting, ensure that the traction slide is clean. Please carefully check whether there is enough lubricating oil on the saddle plate of the tractor and whether there are foreign objects on the traction pin and traction slide of the trailer.

3. Method of connecting the electrical circuit between the semi trailer and the tractor

(1) First connect the two air pipe connectors on the tractor to the two air pipe connectors on the semi trailer. At this time, the air supply pipeline of the tractor is connected to the air supply pipeline of the semi trailer, and the control pipeline of the tractor is connected to the control pipeline of the semi trailer (note: the color of the connector: install the same color, do not install it upside down);

(2) After the air connectors are connected to each other, unscrew the semi trailer air circuit connection disconnector on the tractor to put it in a normal state, otherwise it cannot supply air to the semi trailer braking system and the braking system cannot work;

(3) Start the engine, observe the air pressure gauge in the cab, and increase the pressure in the trailer and tractor air tanks to the specified pressure;

(4) Check whether there is any air leakage in the air circuit and check whether the braking system can work normally;

(5) Insert the cable connection plug of the tractor into the seven-hole socket at the front end of the semi trailer until it is locked on the block of the seven-hole pin;

(6) Check whether the electrodes are well connected and confirm whether the side lights, tail lights, etc. and lights can work normally. After the semi trailer is hung, make sure that all instruments are working normally again and then start.

The above are some operations and precautions on how to unhook a semi trailer. I hope it will be helpful to you in your daily use of the vehicle.

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