Product Overview

The 103-1011-012 sits at the entry point of Eaton's S Series Geroler motor family, offering 5.7 CID (93 cc/rev) in a package that upgrades the proven H Series architecture with rolling-element orbit technology. Where the H Series relies on sliding contact between star and ring, the S Series Geroler design substitutes rollers at each lobe tip, reducing friction and maintaining tighter internal clearances across the full pressure range — translating directly to higher volumetric efficiency, improved starting torque, and measurably smoother low-RPM operation. Rated for 183 N·m continuous torque at 2,000 PSI and 607 RPM at 15 GPM continuous flow, it occupies the mid-range sweet spot: more displacement than compact H Series alternatives but without the weight, cost, or flow demand of larger S Series units. A journal-bearing front support, three-zone pressure isolation, standard 4-bolt SAE mount, 1-inch keyed shaft, and SAE #10 O-ring side ports ensure drop-in compatibility with existing S Series footprints. Common applications span turf care equipment, municipal sweepers and spreaders, small-diameter auger drives, light material handling conveyors, and auxiliary rotary circuits on agricultural and construction machinery where Geroler efficiency brings tangible fuel and cycle-time benefits over conventional gerotor alternatives.

Key Features

✅ Dual-brand interchangeabilityDirectly replaces original Eaton Char-Lynn 103-1011-012 and Danfoss MS0057 series motors, cutting inventory SKUs and stocking costs.

✅ Plug-and-play installationMounting holes, shaft and oil ports match OEM dimensions exactly, no drilling or pipeline modification required to greatly shorten maintenance time.

✅ Precision gerotor assemblyCNC machined stator and rotor maintain minimal internal leakage, stable torque and rotational speed amid fluctuating inlet hydraulic pressure.

✅ Heavy-duty cast iron housingHigh-strength cast iron shell with anti-corrosion coating withstands impact, dust and moisture for outdoor farm and construction work scenarios.

✅ Premium sealing systemHeat and oil resistant nitrile rubber seals reduce external oil seepage and lower routine seal maintenance frequency.

✅ Low speed high torque outputGenerates strong torque at low rotational speed, ideal for winches, conveyors, wheel drives and other hydraulic drive applications.

✅ Optimized internal flow pathReduces hydraulic power loss and heat accumulation to lower energy consumption of the whole hydraulic system.

✅ Strict factory performance testingEach unit passes pressure fatigue, continuous rotation and leakage tests prior to delivery to guarantee stable export quality.

✅ Wide application scopeCompatible with agricultural machinery, light construction equipment, sanitation vehicles, industrial conveyors and other hydraulic machinery.

✅ Flexible procurement solutionsOffer sample trial purchase and full container bulk supply for repair workshops, OEM manufacturers and overseas hydraulic part distributors.

Applications

• Construction Machinery：Excavators, skid steer loaders, backhoe loaders, road rollers, and compact construction equipment.

• Agricultural Equipment：Tractors, harvesters, sprayers, hay balers, agricultural winches, and general farm machinery.

• Material Handling：Forklifts, belt conveyors, lift tables, sweepers, and aerial work platforms.

• Industrial Machinery：Hydraulic winches, drilling rigs, hydraulic power units, industrial automation systems, and conveyor systems.

• Mobile Equipment：Refuse trucks, snow plows, utility vehicles, and marine hydraulic systems.

Other model specifications

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