Good morning dear Sir,
How are you?

This is Sunny from TITAN VEHICLE, how many units semi trailer and tractor head you own now?

During transportation, safety is always the top priority for truck drivers! 
Check that there are no problems before driving, and then you can go on the road.
Based on the rich practical experience of market service professionals, we are here to summarize the use of semi trailer, semi trailer maintenance, and
maintenance knowledge guides for the reference of the majority of drivers. And we will provide the maintenance manual for all of our customers. 

Here make a simple introducution, hope it could give you some help and support for your trailers use.

1, Frequently check whether the trailer tire bolts are loose. 

2, Check the suspension every two days and adjust the tie rods to see if the bolts are loose. 

3, Ensure the specified tire pressure when driving. 

4, Check whether there is air leakage in the air pipe. 

5, Regularly check the distance between the traction pin and the center of the semi trailer axle at both ends, the error shall not be more than 1.5mm. 

6, Check whether the steel U-bolt is loose every 5000km. 

7, The trailer can not be overloaded , unbalanced, or concentrated in the middle of the frame. 

8, The spare tire must be fixed tightly and the safety bolts must be locked. 

Dear Sir, any problem about the semi trailer and tractor head, please contact me at any time, I will give you fully support. 

Thanks & Best Regards,
Sunny