When a customer has a machine down and your shop needs a replacement part, searching through hundreds of listings isn't a good use of anyone's time. In many cases, the fastest place to start is with the OEM part number.
For equipment dealers, repair shops and parts departments, OEM numbers can be used to locate aftermarket replacement parts, identify cross-reference numbers and find additional sourcing options when the original part is expensive, backordered or difficult to locate.
Here's how to make an OEM part number work harder for your parts department.
What Is an OEM Part Number?
OEM stands for Original Equipment Manufacturer. Manufacturers assign identifying numbers to the individual components used on their equipment.
For example, a John Deere, Case IH, New Holland, Kubota or Massey Ferguson component may have an original part number associated with it. That number provides a much more specific starting point than searching for something broad like "tractor generator" or "mower spindle."
Aftermarket parts suppliers can then use those numbers as references to identify replacement components designed for the same application.
Start With the Original Part Number
If the original component is available, inspect it for identifying information.
Part numbers may be stamped into metal, printed on a label or molded directly into the component. Depending on what you're replacing, you may also find manufacturer names, measurements or additional numbers that help identify the part.
When the number isn't visible on the old component, check the equipment's parts manual or illustrated parts diagram.
For a busy repair shop, keeping the OEM number attached to the work order can also make future repairs on the same machine considerably easier.
Use an OEM Cross-Reference to Find Aftermarket Parts
Once you have an OEM number, it can be used for an aftermarket parts cross-reference search.
Many aftermarket replacement parts are cataloged using the original numbers they replace. A single aftermarket component may even cross-reference to multiple OEM numbers or equipment manufacturers.
This can be particularly useful for shops working on older agricultural, construction or lawn and garden equipment. Instead of relying on one source, an OEM number may lead you to another compatible replacement option.
At AIC Replacement Parts, many products include reference numbers and OEM replacement numbers to make it easier for dealers and repair professionals to identify potential replacement parts.
Check for Superseded Part Numbers
Don't assume a part is unavailable because an old OEM number doesn't produce a result.
Equipment manufacturers occasionally replace an older number with a new one. This is known as a superseded part number.
This happens frequently enough that it's worth checking, especially when working on older equipment.
When an original number isn't producing results, search for the number along with terms such as:
replacement, cross reference, superseded, or interchange.
You may discover that the component is still available under a different number.
A Casting Number May Not Be the Part Number
This is an easy mistake to make.
Numbers cast into housings, brackets and other components aren't always orderable OEM part numbers. A casting number may identify the casting itself rather than the complete assembly.
Before using a number to order a replacement, verify what that number actually represents.
This becomes especially important with components such as hydraulic pumps, housings, engine parts and drivetrain components where several numbers may appear on the same assembly.
Verify the Application Before Ordering
An OEM cross-reference is a powerful tool, but it shouldn't replace proper fitment verification.
Manufacturers may change components during a model's production run. The same tractor, mower or piece of construction equipment can sometimes use different parts based on serial number, production date, engine or configuration.
When identifying a wholesale replacement part, compare the information available, including:
- OEM and reference numbers
- Equipment make and model
- Serial number
- Dimensions
- Mounting pattern
- Spline, tooth or blade count
- Electrical specifications
- Photos or diagrams
That extra verification is especially valuable when you're purchasing multiple pieces for inventory.
Why Part Number Cross-Referencing Matters for Repair Shops
For a repair shop or equipment dealer, finding another source for a replacement part isn't just about saving money.
It's about options.
If an OEM part is backordered, a compatible aftermarket replacement may help get a customer's equipment out of the shop sooner. If you're stocking common replacement parts, wholesale aftermarket sourcing can also provide another way to manage inventory costs.
AIC Replacement Parts is a wholesale distributor of aftermarket replacement parts for Agricultural, Construction, Lawn & Garden, Trailer and Industrial equipment.
Our catalog covers a wide range of equipment brands and includes OEM reference and cross-reference information on many products to help professional buyers locate the parts they need.
When you already have the OEM number, start there. A simple part number search may be the quickest path from a machine sitting in your shop to the aftermarket replacement part you need to get it back to work.