• Sourcing Solutions
  • Services & Membership
  • Help & Community

Quick Details

  • Use: Trailer Parts
  • Parts: Trailer Suspension
  • Max Payload: 40T
  • Size: 12000*2500*4000
  • Place of Origin: Shandong, China (Mainland)
  • Brand Name: OBT
  • Model Number: dump semi trailer
  • Certificate: ISO 9001
  • Material: Steel
  • Axle: 3
  • kingpin: 2'/3.5' bolt-in kingpin
  • suspension: mechanical suspension or air suspension
  • Leaf spring: leaf spring or air bag
  • use: truck trailer
  • braking system: relay valve /spring brake chamber or air tanks
  • Wheel rim: 8.5-20,9.0-20,8.25-22.5,9.0-22.5 steel wheel rim optional upon choice
  • Tire: 11.00R20,12.00R20,11R22.5,12R22.5,315/80R22.5 Tire optional

Packaging & Delivery

Packaging Details: As standard export package
Delivery Detail: 15 days after receive your payment

Why choose O.B.T?


       Qingdao O.B.T CO.,LTD, founded in 1997, is a Chinese company with a tradition of producing special vehicles, semi trailers and spare parts for semi trailers.


      O.B.T people will always follow the principal of 3M, marking the responsibility ahead of our cooperation , marking our minds ahead of your request, marking your road ahead safety.




details images



product dates




Tare weight 






Tank body 

Q235A/5mm steel sheet                                         

End plate 

Q235A/6mm .ball shape 


3 axle  OBT brand  13T 


Mechanical suspension American type local brand 

Leaf spring 

Leaf spring 10pcs*90*13mm

Manhole cover 

500mm manhole cover .3 sets 


12R22.5 double star brand 12pcs

Wheel rim

9.0-22.5 better brand     12pcs

Discharge valve 

4”disc valve 

Discharge pipe 

4”seamless steel tube 

Outlet pipe 

4”rubber hose.6m


JOST brand 2” bolt-in king pin 

Landing gear 

JOST brand two-speed, manual operating ,heavy duty landing gear 24T 


Diesel engine: weichai brand model: 4102.

Air compressor 

37 KW, 0.2Mpa. 1000r/Min 


Three compartment                                   

Braking system 

WABCO RE6 relay valve ;T30/30 spring brake chamber;40L air tanks 


LED 8 side lights and 2 rear lights 2 width lamp

Air-charging system 

2”main hole.2”check valve .1.5”safe valve.0.4Mpa.gauge

Quadratic blow 

1” diameter check valve 


Complete chassis sand blasting to clean rust ,1coat of anticorrosive prime,

2coats of final paint


One standard tool box,one spare tire carrier,one crank,one shaft head wrench,

four side light,two rear light

 To Learn More:

By using traction pin,the semi-trailer can be connected to or seperated from tractor according to the requirement.
The trailer is mainly composed of frame,wagon box,traction device,braking device,axle assembly,electrical system,etc.

Frame:The frame is the main part for supporting load,mounting traction pin,suspensio and supporting device;
it's a space framework structure assembled by welding components such as H longitudinal beam(16Mn special steel
plate welded by using automatic submerged arc welding machine),through beam,horizontal beam and edge beam.
It's featured by its proper structure,balanced strength and stiffness ,high carrying capacity,permanent deformation-resistance,etc.


The fifth-Wheel is used to bear the front loading of trailer.The fifth wheel is divided into two kinds of 50#and
90# to match the traction pins of different specifications.

Supporting Device
It's a device to support the front loading of trailer after detaching.The support leg is divided into tandem-drive
form and single-drive form.With nearly identical structure,the two forms are both composed of base,lead-screw
driving mechanism,internal square cylinder,external square cylinder,gearbox,operating crank,etc.

It's a bearing and damping device.
The suspension system is divided into two-axle of three-axle balanced steel-plate spring suspensions.The
steel-plate spring is fixed on the axle by using U-bolts with both ends stuck in the frame support and tandem
connection enabled by balance arm which will freely sway in a certain range to enable the balance of axle loading
in a certain range.The steel-plate spring mainly support the vertical gravity on the frame and the horizontal acting
force is transmitted by lower support and pull rod.
Through adjusting the pull rod,the two axles can be adjusted in parallel to avoid the exceptional abrasion to the tire.

Air Brake Assembly
With dual-line braking system,the trailer is mounted with an emergency relay value which is a device for the
normal driving braking and automatic emergency braking.

1.Air Charging and Safety Braking
When the air compressor is on, the air cylinder is charged through air-charging line via emergency relay value .
2.Service Brake
By stepping down the brake pedal,the compressed air will pass manipulation line and enter the control chamber
of emergency value to open the compressed air path and enable the air-charging of brake chamber and the brake
to work.By releasing the brake pedal,the brake is disable.
3.Emergency Braking
When the leading air pressure of air-charging line is below 392Kpa or the line is broken because the tractor accidentally
detaches from trailer on driving, the compressed air in the air cylinder will pass emergency relay valve and enter the brake
chamber to enable the brake to work and the trailer to aumotically brake.The quantity of emergency-storage
brake chamber shall not less than 2.

Axle Assembly
The axle assembly is the component used for bearing,driving and braking,which is mainly composed of tire,
wheel,wheel hub,brake and axle.

Electriacl System
The rated voltage for the electrical devices of the entire vehicle is 24V with signal-line circuit,minus earth.
The trailer is connected to tractor by using the cable with 7-pin socket.On the sides of trailer there are side signal
lights and side steering lights.At the rear,there are lighting and signal devices for driving, braking,reversing,
steering, fog light,license plate,etc.

Spare-tire Lift
The trailer manufactured by our company adopts the suspension-chain spare-tire lift.When using it,first lower
the chain of the spare-tire chain to the proper position,then mount the lift bracket on the center of the wheel rim,
twist the crank clockwise to enable the spare tire to rise via the chain and fasten the nut on the bracket when
reaching the required position.Reversely,twist the crank counter-clockwise and the spare tire will be laid down.

Our Plant:

The OBT tipping semi trailer is high strength and durable that will be your best tool.

Packaging & Shipping



  1. Our MOQ
One unit trailer .We suggest two trailers one time to save the freight.

2.Terms of paymemt
30% contract value as the deposit by T/T,70% contract value payoff before delivery time.

3.To meet your special requirement
Absolutely!!! We can discuss the practicable plan and produce it as your request.

4.Our Warranty
All of our trailers are produced strict with ISO standard,you needn’t worry about it.Certainly,

if your trailer parts wear out,we can provide suitable parts for you. 

our brand

                                      QINGDAO O.B.T CO.,LTD since 1997                                     




contact with us

Transaction History of the Supplier

Below is the information about the supplier's transactions conducted via Alibaba.com. If you require further details regarding the transaction data, please contact the supplier directly.

Transaction Overview


Transaction Details

This supplier has completedtransactions with buyers from .

Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
Trade Assurance
China (Mainland) | Trading Company
Transaction Level:
Supplier Assessments:
5 Transactions 50,000+
The supplier’s transactions conduted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $121,000
Learn More