If you own a 2020 model heavy-duty truck equipped with a Hendrickson suspension system, you may eventually need to replace components. Whether you're servicing the air springs, shocks, or other parts, having the correct part number is essential. This guide explains how to find and decipher the Hendrickson suspension part number for your 2020 vehicle, helping you avoid costly mistakes and downtime.
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Hendrickson S-20901 - Air Spring
Understanding Hendrickson Suspension Systems
Hendrickson is a leading manufacturer of suspension systems for commercial trucks, trailers, and buses. Their systems are known for durability and ride quality. Common models include the HA series for steer axles, the HAS series for drive axles, and the INTRAAX for trailers. For 2020 model trucks, Hendrickson offers a range of suspensions depending on the application – vocational, on-highway, or severe-duty. Each system uses specific components with unique part numbers.
Why the Part Number Matters
Using the exact part number ensures that the replacement component matches your suspension's design specifications. A wrong part can lead to improper fit, reduced performance, or even safety issues. Part numbers also help you order from dealers or distributors accurately. Hendrickson updates part numbers over time, so a 2020 model may have different numbers than earlier or later years.
How to Find the Part Number on Your Suspension
Check the Component Label
Most Hendrickson suspension components have a label or sticker with the part number. Look on the air spring, shock absorber, or other parts. The label is usually attached to the body of the component. On air springs, it may be on the top or bottom plate. On shocks, it's often on the reservoir tube. Keep the label clean – if it's worn, you may need to clean it gently with a rag.
Locate the Data Plate on the Vehicle
Some trucks have a suspension data plate mounted on the frame rail or near the suspension. This plate lists the suspension model and sometimes part numbers for major components. For a 2020 truck, check the driver's side frame rail or the crossmember near the rear axle.
Use the VIN to Look Up Original Equipment
Your truck's VIN (Vehicle Identification Number) can help you determine the original suspension configuration. Many OEM parts catalogs allow you to enter the VIN to see the build sheet, which may include suspension part numbers. This method is useful if the labels are missing or damaged.
Refer to Service Manuals
If you have access to the truck's service manual or Hendrickson's technical documentation, part numbers are often listed for each component. These manuals are available online from Hendrickson or through truck manufacturer websites.
Decoding the Part Number
Hendrickson part numbers follow a specific format. Typically, they consist of a series of letters and numbers that indicate the component type, size, and design revision. For example:
- Air Springs: Numbers often start with "1000" or "2000" followed by a dash and additional digits. The first few digits indicate the style and capacity.
- Shock Absorbers: Part numbers may start with "4500" or "4600".
- Bushings and Hardware: Usually shorter numbers with letters for material.
Understanding the format helps you recognize when a number is correct. Hendrickson's website has a part number decoder tool, or you can contact their customer support for assistance.
Common Part Numbers for 2020 Models
While specific numbers vary by truck make (Freightliner, Kenworth, Peterbilt, etc.) and suspension model, here are typical ranges for 2020:
- HAS Series Air Spring: Part numbers like 1000-1001 or 2000-1105 are common.
- HA Series Shock Absorber: Look for numbers in the 4580-XXXX range.
- INTRAAX Trailer Suspension: Components use part numbers starting with 6000.
For accurate identification, always cross-reference with the specific truck model and suspension option code.
Cross-Referencing and Verification
Once you have a potential part number, verify it using multiple sources. Hendrickson's official catalog and cross-reference guides are reliable. Many heavy-duty parts distributors also provide online lookup tools. Compare the shape, mounting type, and dimensions (e.g., shock absorber length, air spring diameter) to ensure match. If you're replacing an existing part, remove it and check the number directly.
Tips for Ordering the Right Part
- Double-Check the Year and Model: A 2020 truck might share parts with 2019 or 2021, but not always. Confirm your chassis year.
- Note the Suspension Variant: Options like ride height, load capacity, and axle configuration affect part numbers.
- Don't Rely Solely on the Dealer: While dealerships can help, having the part number yourself saves time and reduces errors.
- Clean the Area Before Reading: Dirt and grease can obscure labels. Use a degreaser if necessary.
- Photograph the Label: Take a clear photo of the label with your phone for reference when ordering.
Conclusion: Get the Right Hendrickson Part Every Time
Finding the correct Hendrickson suspension part number for your 2020 truck is straightforward if you know where to look. Start by inspecting the components themselves, then use the VIN or service manuals as backups. Always verify after obtaining a number, and don't hesitate to contact Hendrickson technical support for confirmation. By following these steps, you'll minimize downtime and ensure your suspension performs as designed.