Olympian Serial & Model Number Guide

Every Olympian generator carries a model/serial label. Here is where to find it, what each part of the number means, and how to use it for parts, service and age.

Where to find it: the rating plate on the unit; cross-check the model designation against Caterpillar's own official Olympian ratings guide, which lists every model by name.

What the number means

Worked example — GEP18-6:

Part	Meaning	Detail
`GEP`	Product line	Olympian's diesel generator-set line (GEK covers smaller kW classes).
`18`	Power class	Approximate standby kVA/ekW rating class, per Caterpillar's official Olympian Electric Power Ratings Guide.
`-`	Phase	A plain hyphen (no SP) denotes three-phase output; SP denotes single-phase output instead (e.g. GEP14SP6) — observed directly from the ratings guide's own "Three Phase Output" / "Single Phase Output" table sections, not a stated glossary rule.
`6`	Configuration	An engine/emissions configuration variant (e.g. Low BSFC, EU Stage II, EU Stage IIIA), tied row-by-row to the ratings guide's own "Configuration" column — not a pole count or frequency, despite looking like one.

Using the serial number

This breakdown is derived directly from the structure of Caterpillar's own official ratings tables, not a single explicit glossary sentence — treat the phase and configuration readings as observed patterns, confirmed row-by-row, rather than a quoted definition. No public serial-to-build-date formula was found.

Popular Olympian models

Full specs, parts and maintenance data for specific units:

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Decode rules verified against: Caterpillar "Olympian Electric Power Ratings Guide — Generator Sets" (LEXE7581-04, June 2013). Figures are for reference; confirm against the official documentation for your exact unit.