4757NP21/4757 N P21 Contitech Truck Air Suspension A9423204321 Mercedes Benz Shock Absorbers
Product Description
Truck air springs are key upgrade components for modern commercial vehicle suspension systems. They significantly improve ride comfort, protect cargo safety, extend chassis life, and optimize vehicle handling stability by providing superior cushioning, highly precise adjustment capabilities, and excellent load adaptability. Their intelligent, efficient, and durable features are increasingly becoming the core technology for improving truck transportation efficiency and user experience, and represent the future trend of commercial vehicle suspension systems continuing to develop toward intelligence and comfort.
Item Name: Truck Air Suspension Spring
Model Number: 1T4757
Brand: GUOMAT
Application: For Truck
Maximum Working Pressure: 7 BAR
Bellows Material: Natural Rubber
Piston/Base Design: Steel Piston
(Mounting Type): Top bolt mounting, bottom pressure plate mounting
GUOMAT No.: 1T4757
Contitech: 4757NP21 / 4757 NP21 / 4757 NP 21 / 4757 N P21
Airtech: 34757-21K
Airfren: 20.4757.1CM
DT: 4.80374
Peautomotive: 084.111-15A
Peautomotive: 084.111-75A
Templin: 04.010.6100.960
Mercedes Benz: A9423204321
Mercedes Benz: A 9423204321
Mercedes Benz: A 942 320 4321
Mercedes Benz: A 942 320 43 21
Mercedes Benz: 9423204321
Mercedes Benz: 942 320 4321
Mercedes Benz: 942 320 43 21
Mercedes Benz: A9423200117
Mercedes Benz: A 9423200117
Mercedes Benz: A 942 320 0117
Mercedes Benz: A 942 320 01 17
Mercedes Benz: 9423200117
Mercedes Benz: 942 320 0117
Mercedes Benz: 942 320 01 17
Selection of Air Springs for Truck Suspensions
1. Determine core parameters
Load range: Select the load capacity of the spring according to the vehicle's unloaded and fully loaded weight (including axle load distribution), and reserve a safety margin of 10%-15%.
Stroke requirements: Ensure that the spring stroke matches (such as ±75mm, ±100mm) based on the minimum to maximum compression distance of the suspension design.
Installation space: Measure the available space (diameter, height) and select the appropriate spring type (such as sleeve, corrugated or membrane).
2. Spring type selection
Sleeve air spring: suitable for high loads and large strokes (such as heavy truck rear suspensions), good durability but large size.
Corrugated air spring: lightweight design, suitable for medium loads (such as trailer suspensions), low cost.
Membranous air spring: compact and flexible, commonly found in passenger cars or light trucks, but requires high installation accuracy.
3. Key performance considerations
Stiffness characteristics: nonlinear stiffness can be achieved by adjusting the number of airbags or adding air chambers to optimize the shock absorption effect.
Durability: high-strength rubber composite materials (such as EPDM + nylon cord) are selected, and attention should be paid to anti-aging and oil resistance.
Environmental adaptability: low-temperature elastic materials (such as silicone rubber) are required in cold areas, and dust cover design is required in dusty environments.
4. Verification and adaptation
Bench test: simulate dynamic loads (such as 5 million cycle tests) to verify fatigue life.
Real vehicle matching: check the interference with shock absorbers and guide mechanisms to ensure motion compatibility.
The Real Pictures of 1T4757 Air Spring
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4757NP21/4757 N P21 Contitech Truck Air Suspension A9423204321 Mercedes Benz Shock Absorbers Images
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