Guangzhou Tech Master Auto Parts Co.Ltd

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Mercedes Truck Air Suspension , Truck Suspension Air Bags A 942.320.01.21 4390np01 9505

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Mercedes Truck Air Suspension , Truck Suspension Air Bags A 942.320.01.21 4390np01 9505

China Mercedes Truck Air Suspension , Truck Suspension Air Bags A 942.320.01.21 4390np01 9505 supplier
Mercedes Truck Air Suspension , Truck Suspension Air Bags A 942.320.01.21 4390np01 9505 supplier

Large Image :  Mercedes Truck Air Suspension , Truck Suspension Air Bags A 942.320.01.21 4390np01 9505

Product Details:

Place of Origin: China
Brand Name: Tech Master
Certification: TS16949
Model Number: 1K4104

Payment & Shipping Terms:

Minimum Order Quantity: 10pcs
Price: Negotiation
Packaging Details: Packed in carton firstly,and then reinforced with wooden case for outer packing
Delivery Time: 3-7 working days after received your payment
Payment Terms: T/T, Western Union, PayPal
Supply Ability: 3,000pcs per month
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Detailed Product Description
Material: Rubber Snd Steel Part No.: 1K4104
Car Make: MERCEDES Condition: Brand New
Warranty: 1 Year Type: Truck Air Supension
OEM No.: A 942.320.01.21 4390NP01 9505
High Light:

truck air suspension


truck suspension air bags

Mercedes Truck Air Springs Contitech 4390NP01 Air Ride Suspension Bellow Bag Goodyear 9505


Production Description


 truck air spring 

Contitech: 4390NP01


Goodyear: 9505


Mercedes: A 942.320.01.21



Air Springs





A 942.320.01.21






Rubber + Steel


OEM Standard


12 Months


Products Photo:

Mercedes Truck Air Suspension , Truck Suspension Air Bags A 942.320.01.21 4390np01 9505 0


Rolling lobe air springs with metal parts are mostly used in trucks and trailers.

Rolling lobe air springs with metal parts are also used in some types of busses.

Besides, they are used as a third axle spring or lifting spring in some vehicles.

Compared to the rolling lobe air springs (air springs without top plate), they are used especially in heavy load transportation.

Loading capacity of air spring can go up to several tons and can operate at up to hundreds mm operation height.


The Benefits of Air Spring


Is the rear end of your vehicle sitting low from a heavy load? This is called squat or sag. Lift it back up where it belongs and enjoy the benefits listed below. This is especially beneficial while towing: adjust the air springs to accept the tongue weight of the trailer.




The two front tires bear the majority of braking and steering. Air spring ensures that weight is properly distributed to all four tires for optimal braking and steering.

  • Long lasting service on almost all truck and trailer air suspensions
  • Absorb road shock to help tractors and rigs last longer
  • Cut down on vibration and driver fatigue
  • Long, trouble free service, constant level hauling, quite cushioned ride


We are professional air suspension producer and supplier. We provide various products, such as, air spring, air shock, air compressor, air suspension spare parts and so on. We also supply truck air spring, cabin air spring, industrial air spring.


Warning and Tips


Maintenance of the air springs, Vehicle Check-List

  •  Check the air lines and devices of leakage and that they turns freely.
  •  Check the bellows bearing for damage, correct fastening, deformation, sharp edges.
  •  Check the shock absorbers for operation and impermeability as well as tightness and bearing.
  •  Periodically, check nuts and bolts for proper torque. For specific recommendations see manufacturer's manual.
  •  Check axle suspension, trailing arms and rods for wear. 
  •  Check height control valve to see that it is functioning properly. A properly maintained valve will save unneeded maintenance expense.
  •  Routine inspection of all of the above according to manufacturer's instructions, will extend the life of your vehicle and reduce your overall maintenance expense. 


Air Spring Installation

  1. Before you start installing air springs, make sure you have all the necessary tools and equipment to perform the repair safely.
  2. Familiarize yourself with the suspension on which you are performing the repair by reviewing the manufacturers service guide.
  3. If you are in doubt about something, ask for assistance from a qualified suspension specialist, the suspension manufacturer or the air spring manufacturer; This can save you a lot of time and aggravation later in the job.


Important tips to remember when installing a new unit

  • Check levelling valve, linkage and transmission parts for wear and damage and if necessary replace the damaged parts.
  • Check that the shock absorber for leakages and take a shock absorber test. A defective shock absorber must be replaced.
  • Once the air lines are disconnected, check their entire length for cracks or other damage. Replace worn parts.
  • With the air spring removed, other parts of the air suspension become more accessible. Check for wear or damage of the frame hangers, trailing arm bushings, torque rods, the trailing arms and the air spring mounts. When it is necessary, also replace parts.
  • Check bearing for air spring bellow for external damage, deformation, sharp edges and correct fastening.
  • Before installing the new unit, clean the air spring mounting plates to ensure proper attachment to the suspension.
  • Always use new attaching bolts for the installation and observe the tightening torques. Never use old bolts, because these can fall out.
  • Check the linkage of the levelling valve to see that it is functioning properly. Under load, the linkage should move from the neutral position up to the intake position. This lets air into the springs, which brings the arm back to the neutral position. This lets air into the springs, which brings the arm back to the neutral position. That opens the exhaust valve, allowing air to escape until the arm returns to the neutral position. Then check the driving level.


Company Information:


Guangzhou Tech Master Auto Parts Co. Ltd. is a professional company specializing in developing, producing and exporting air suspension parts, such as, air spring, air strut, air shock absorber, air compressor, power steering pump, steering rack, control arms, other spare parts and suspension accessories, especially for Mercedes-Benz, BMW, Audi, Land Rover, Lincoln, and Ford. We also supply other models of the air suspension parts and a series of high-grade heavy truck front and rear air springs.

Mercedes Truck Air Suspension , Truck Suspension Air Bags A 942.320.01.21 4390np01 9505 1


Contact Us:


If you have any questions, please feel free to contact with us. We would be very glad to help you. We will get back to you within 24 hours or get back to you immediately.


Contact Name: Anita Huang

Skype: tmairsuspension_Andy

Tel: 0086 13501538820(WhatsApp)



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