JMF64

Applicable models: 11-16-ton hydraulic excavator rotary drive device,

Frame mounting hole 9-018 (+1 positioning hole), vertical shaft tooth (10T/12T)

R130-5, DH150-7, DX150, R150-7, R110-7, XE135

Introduction

The JMF64 is a fixed-displacement axial piston swing motor manufactured by Eaton as part of their JMF series. It is designed specifically for the slewing (swing) function of hydraulic excavators, combining a hydraulic motor with an integrated planetary gearbox and a fail-safe mechanical parking brake. Known for its compact design and high power density, it is a standard component in 11–16 tonne class excavators.

📝 Key Notes for Identification

Always cross-reference the OEM part number when selecting a replacement. For example, a Hyundai R130-7 swing motor may be listed under part number 31N4-10130.

Internal Component Part Numbers: The JMF64 motor uses a standard set of internal part numbers for repair kits and components. Common examples include:

644101 — Cylinder Block

644102 — Valve Plate

644103 — Piston Assembly

644104 — Retainer Plate

644105 — Ball Guide

Model Variants Matter: Suffixes or alternate designations (e.g., JMF064, JIC JMF-64, WSM-64) may indicate different configurations or aftermarket equivalents. These are not always directly interchangeable without verifying dimensions and port layout.

Verify with Your Machine Serial Number: Compatibility lists are a guide, but final fitment always depends on the specific machine's configuration. Before ordering, confirm the mounting flange, shaft spline, and hydraulic port layout match your original unit.