Char-Lynn & Eaton Orbital Motor Cross-Reference Guide (Find Your Replacement)

by Resto Power July 1, 2026

Char-Lynn (now part of Eaton and Danfoss) builds some of the most widely used orbital hydraulic motors in the world — and when one wears out, finding the correct replacement or cross-referenced equivalent is critical. This guide explains how Char-Lynn motor series are organized, how to cross-reference a Char-Lynn part number to an equivalent motor, and how to find the exact Char-Lynn / Eaton orbital motor or part you need.

Understanding Char-Lynn motor series

Char-Lynn organizes its geroler and gerotor low-speed high-torque (LSHT) motors into families. The most common series you will encounter include:

H Series (101/103/104) – the classic general-purpose orbital motors.
S Series – spool valve motors, often with 2-bolt or 4-bolt mounts.
2000 / 4000 / 6000 Series – higher displacement and torque ranges.
T / TG / TF Series – disc-valve motors for demanding applications.

Each series is defined by displacement (cc per revolution), shaft type, port configuration, and mounting flange.

How to read a Char-Lynn part number

Char-Lynn part numbers are typically an 8-digit code (for example, 101-1001-009). The leading digits indicate the series and displacement, while the trailing digits define the shaft, ports, and specific build. Always record the complete number stamped on the motor housing or nameplate — the last three digits often distinguish otherwise-identical motors.

Cross-referencing to an equivalent motor

Because Char-Lynn motors are an industry standard, many aftermarket manufacturers build direct drop-in equivalents that meet or exceed the original specs for displacement, RPM, flow, pressure, and torque. To cross-reference correctly, match these key parameters:

Displacement (cc/rev) – the single most important spec.
Shaft type & size – straight keyed, tapered, or splined.
Port type & position – SAE, NPT, or manifold.
Mounting flange – 2-bolt or 4-bolt pattern.
Maximum pressure & speed rating.

If all five match, an equivalent motor will bolt in and perform to spec. When in doubt, send us your part number and application details.

Common Char-Lynn interchange brands

Char-Lynn / Eaton orbital motors are commonly cross-referenced against equivalents from Danfoss/Sauer, White, Parker, Ross/TRW, M+S, and other LSHT motor lines. Displacement and mounting are usually the deciding factors when matching across brands.

Find your Char-Lynn replacement at RestoPower

We specialize in hard-to-find and obsolete Char-Lynn and Eaton orbital motors and parts. Browse our Char-Lynn / Eaton orbital motors collection, grab a matching seal kit for a rebuild, or browse all hydraulic parts. If you can't find your exact motor, request a same-day quote and our team will help you cross-reference it — backed by a 2-year warranty. You can also download Char-Lynn & Eaton catalogs and rebuild guides for exploded views and service data.

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Frequently asked questions

Is Char-Lynn the same as Eaton?
Yes. Char-Lynn is a product line owned by Eaton, and the hydraulics business is now under Danfoss. Char-Lynn part numbers carried over, so a Char-Lynn number and its Eaton reference typically point to the same motor.

Can I replace a Char-Lynn motor with an aftermarket one?
Yes, as long as the displacement, shaft, ports, mounting, and pressure/speed ratings match. A correctly cross-referenced aftermarket motor is a direct drop-in replacement.

My motor tag is missing — can you still help?
Often, yes. Measurements of the shaft, ports, and mounting flange plus photos let us identify or cross-reference most motors.