Cummins Serial Numbers And Dataplates

Ordering the right diesel parts starts with one simple step: read the engine dataplate. The dataplate is a small metal tag on the engine, and it holds the codes you need to match parts correctly. Guessing leads to wrong parts, returns, and lost time.

Key Items on a Cummins Dataplate.

• Engine Serial Number (ESN): the unique number for that one engine, like a fingerprint. Use it to look up the exact build history.

• Engine Model: the engine family and basic type, for example a 6BT 5.9 model code.

• CPL (Critical Parts List): the most important code for parts. The CPL points to the exact build specification. Two engines that look the same can have different parts inside — the CPL removes the guesswork.

Where to Find the Dataplate.

It is usually on the engine itself, often near the front gear housing or on the rocker (valve) cover. The numbers may also be stamped into a flat machined pad on the block.

When Ordering Parts.

Give your supplier the ESN and CPL whenever you can. If the dataplate is missing or worn, send clear photos of the casting numbers on the block and head. Write the numbers down before the engine is cleaned or painted, because the marks can be hard to read later.

A Small Tip That Saves Time.

Take a clear photo of the dataplate as soon as the engine arrives, and keep it with the job file. This saves time on every future parts order for that engine.

Reading the dataplate takes one minute and prevents costly mistakes. Teach this habit to anyone on your team who orders parts.