Product Overview
The 104-1215-006 is a large-displacement model in the Eaton/Char-Lynn 2000 Series of low-speed high-torque geroler hydraulic motors, featuring a geometric displacement of 400 cm³/rev with Geroler roller-stator and disc valve distribution. As a standard-duty 2000 Series unit, it delivers true bi-directional operation and high power density, with a maximum inlet pressure of 4500 psi (310 bar).
This motor is a direct drop-in replacement for Eaton/Char-Lynn 2000 Series OEM motors of matching specification — mounting flange, shaft, and port locations are fully interchangeable with no hydraulic circuit or mechanical interface modifications required. Every unit undergoes 100% simulated load-condition bench testing covering continuous pressure, intermittent pressure, and the full speed range to ensure volumetric efficiency and output torque meet OEM standards.
Technical Specifications
Model: 104-1215-006 (Eaton/Char-Lynn 2000 Series)
Displacement: 400 cm³/rev (24.03 cu-in/rev)
Series: 2000 Series
Max Inlet Pressure: 4500 psi (310 bar)
Continuous Working Pressure: 3000 psi (207 bar)
Rated Output Torque: 6860 in-lb (approx. 775 N·m) at rated pressure
Continuous Max Speed: 191 rpm @ 20 gal/min
Intermittent Max Speed: 287 rpm
Rated Flow: 20 gal/min (75.7 L/min)
Control Type: Disc valve distribution; bidirectional rotation; speed infinitely adjustable via hydraulic flow
Mounting Flange: 2-bolt SAE B flange, 101.6 mm [4.00″] pilot diameter, 14.35 mm [.565″] holes on 146.0 mm [5.75″] bolt circle
Shaft Type: 1-1/4 inch involute SAE C splined
Port Size: SAE-10, 7/8-14 UNF
Drain Port: 7/16-20 UNF-2B SAE O-ring
Weight: Approx. 21 kg
Data source: Applied Industrial Technologies, Xeriwell distributor technical data. Simultaneous operation at maximum speed and maximum pressure is not permitted. Maximum operating oil temperature: 80°C.
Key Technical Advantages
1. Disc Valve Distribution with Three-Zone Pressure Design
The 104-1215-006 features the signature disc valve architecture of the 2000 Series, with automatic wear compensation at the valve plate-to-rotor interface. The three-zone pressure design ensures identical performance in both forward and reverse rotation, eliminating reversal shock and torque asymmetry — ideal for applications requiring frequent direction changes.
2. High Volumetric Efficiency with Geroler Roller-Stator Set
The precision-machined Geroler roller-stator set, combined with disc valve distribution, maintains volumetric efficiency above 90% under rated conditions. The rolling column design significantly reduces internal friction losses compared to conventional gear-type configurations, sustaining high mechanical efficiency even at 400 cm³ displacement.
3. Heavy-Duty Industrial Bearings for Extended Service Life
The output shaft is supported by heavy-duty industrial bearings, precision-matched and preloaded to withstand substantial radial loads. This bearing configuration allows the motor to directly drive sprockets or gear mechanisms without additional support structures, suitable for continuous heavy-duty operation.
4. High Power Density in a Compact Package
At the 400 cm³ displacement level, the 104-1215-006 maintains an excellent power-to-weight ratio. Its compact axial dimensions and standardized mounting interface facilitate easy integration into existing hydraulic systems, making it an ideal replacement for original Char-Lynn motors.
Application Areas
Construction Machinery: Excavator travel drives, compact track chassis drives, loader attachment drives
Agricultural Equipment: Combine harvester drive systems, tractor implement drives
Material Handling: Conveyor drives, winch and hoist mechanisms
Municipal Equipment: Street sweeper brush drives, snow removal equipment
Industrial Drives: Production line rotary mechanisms, specialty equipment drive systems
Expert Maintenance Tips
Installation Guidelines:
Before installation, verify system oil cleanliness meets ISO 18/13 or better. The disc valve face is sensitive to particulate contamination — install a 10μm filter upstream of the motor inlet.
Shaft alignment between motor and load must be within 0.05mm. Use a flexible coupling — rigid connections are not permitted.
During initial commissioning, run at no more than 30% of maximum working pressure for at least 30 minutes of no-load break-in.
Operational Maintenance:
Route the external drain line separately back to the reservoir, maintaining case pressure below the shaft seal rating.
Normal operating oil temperature should not exceed 80°C. Monitor case temperature regularly; if abnormally high, prioritize checking distribution face wear or system internal leakage.
Use premium anti-wear hydraulic oil with viscosity maintained at 20-43 cSt at operating temperature.
Inspect volumetric efficiency every 2,000 hours or every 12 months. If efficiency drops by more than 10% of rated value, disassemble and inspect the valve plate and rotor-stator assembly.
