Mack Suspension Part Numbers: How to Identify and Order the Right Parts

When maintaining or repairing a Mack truck, knowing the correct suspension part numbers is essential. Misidentifying a part can lead to costly downtime and safety issues. This guide explains how Mack suspension part numbers are structured, where to locate them, and how to ensure you order the right components.

Understanding Mack Suspension Part Numbers

Mack uses a specific numbering system for its suspension components. The part number typically consists of a series of digits and sometimes letters that identify the part type, model, and revision. While the exact format can vary by era and component, most part numbers follow a pattern that includes a prefix for the series (e.g., “60” for the Mack 460/460R series) and a suffix indicating the specific part.

For example, a common rear suspension upper control arm bushing might have a part number like 60-190-001. The first two digits often denote the suspension series. Knowing the series your truck uses (such as the Mack Camelback, Air Leaf, or Air Ride) is the first step in decoding the number.

Common Mack Suspension Systems and Their Part Numbers

Mack has produced several suspension systems over the years. Each has its own set of part numbers for components like bushings, torque rods, air springs, and shock absorbers.

Camelback Suspension

The Mack Camelback is a heavy-duty leaf spring suspension found on older and some current vocational trucks. Key part numbers include:

• Torque Rods: Often start with “60-” or “61-” depending on length. For example, a forward torque rod bushing kit might be 60-150-001.
• Springs: Leaf spring part numbers typically include the number of leaves and capacity. Example: 60-200-004 for a four-leaf spring.
• Bushings: Camelback bushings have numbers like 60-120-002 for the lower rear bushing.

Air Leaf Suspension

The Air Leaf combines air springs with a single leaf spring. Common part numbers:

• Air Springs: Often begin with “AL” or “60-AL”. Example: AL-90-001 for a standard air spring.
• Leveling Valves: Part numbers like 60-560-001.
• Shock Absorbers: Mack shock numbers usually include “MS” prefix, like MS-60-001.

Air Ride Suspension (including Mack IFS)

Modern Mack tractors often use air ride suspensions like the Mack Air Ride or the proprietary IFS (Independent Front Suspension). Part numbers for these systems are more varied:

• Air Springs: Can be found with “AR” prefix. Example: AR-120-003.
• Control Arm Bushings: Often part of a kit, e.g., 60-700-001 for front control arm bushing kit.
• Height Control Valves: Part number 60-580-001.

Where to Find Mack Suspension Part Numbers

You can locate the part number on the original part itself. Look for stamped or etched numbers on metal components, or on a sticker attached to air springs and rubber parts. If the part is not visible, check the truck’s service manual or parts catalog specific to your make and model year. Mack dealerships can also look up part numbers using your Vehicle Identification Number (VIN).

Many aftermarket manufacturers use the same original equipment (OE) numbers, so knowing the Mack number helps you cross-reference to brands like Moog, TRW, or Hendrickson.

Tips for Ordering the Correct Part

1. Verify the suspension model: Check your truck’s build plate or VIN to confirm which suspension system it has. Mack’s VIN decoder can tell you if it’s Camelback, Air Leaf, etc.
2. Use a reliable parts catalog: Online catalogs from Mack or trusted aftermarket suppliers allow you to search by part number or VIN.
3. Match the exact number: Even small differences in suffixes (e.g., -001 vs -002) can mean different dimensions or materials.
4. Compare visual features: If you have the old part, compare its shape, mounting holes, and size with the replacement. Don't rely solely on the number if the part appears different.
5. Consult a professional: If you’re unsure, a Mack dealer parts specialist can confirm the correct part from your description or photo.

Decoding Part Number Prefixes and Suffixes

Understanding the pattern helps you avoid mistakes. Common prefixes include:

• 60 – Mack Camelback/Leaf spring suspensions
• 61 – Mack Air Ride suspensions (older)
• AL – Air Leaf specific
• AR – Air Ride specific
• MS – Shock absorbers
• BR – Bracket or frame components

Suffixes often indicate revision level. A higher number usually means a newer version. For instance, a bushing might be updated with a different material, changing -001 to -002. Always use the latest revision unless you have a reason not to.

Where to Buy Mack Suspension Parts

You can purchase genuine Mack parts from authorized dealers. Aftermarket options are available from major brands like Hendrickson (which supplies many Mack suspensions), Reyco Granning, and others. Online truck parts retailers also stock common suspension parts. When buying aftermarket, ensure the part number cross-references correctly and check for warranty coverage.

Avoid using non-branded parts from unknown sources, as suspension components are critical for safety and ride quality. Stick with reputable manufacturers.

Final Recommendation

To order Mack suspension part numbers with confidence, start by identifying your truck’s suspension system and locating the original part number. Use Mack’s official parts lookup or a trusted dealer to verify the number. If you are replacing a part that has failed, consider replacing related components (like bushings and hardware) at the same time to save labor later. Keep a record of part numbers for future reference. If in doubt, consult a Mack technician—they can help you avoid the costly mistake of ordering the wrong part.