Product Description
Premium factory-direct HZ-74318-DAR Fixed Displacement Axial Piston Motor, precision-engineered as a 100% direct drop-in replacement for OEM Eaton / Char-Lynn 74318-DAR (74318 / 74315 Series). Designed for heavy-duty mobile, agricultural, and industrial rotary drives, this compact swashplate piston motor delivers dynamic breakout torque, smooth low-RPM operation, and exceptional volumetric efficiency. Ideal for combine harvester headers, sweeper brooms, turf equipment, and hydraulic winches, our HZ-74318-DAR motor reliably handles continuous operating pressures up to 210 bar with peak shock tolerances up to 250 bar.
Technical Parameters & Model Selection Guide
| Haozheng Model Code | OEM Cross Reference / Part No. | Technical Specifications & Features |
|---|---|---|
| HZ-74318-DAR | • Eaton / Char-Lynn: 74318-DAR / 774318-DAR • Eaton Series: 74318 / 74315 Series • Type: Axial Piston Fixed Motor |
• Type: Swashplate Axial Piston Motor • Nominal Pressure: 210 bar (3000 PSI) • Max Peak Pressure: 250 bar (3600 PSI) • Application: Combine Harvesters & Agricultural Drives • Mounting: Standard SAE Flange & DAR Port Layout |
FAQ
Q1: Can your HZ-74318-DAR motor replace our old Eaton 74318-DAR directly without modifying hydraulic lines or mounting brackets? A: Yes, 100%. The ‘DAR’ code designates exact SAE mounting bolt patterns, shaft dimensions, and fluid port locations. Our HZ-74318-DAR is manufactured strictly according to original Eaton Char-Lynn dimensional specifications for a direct, bolt-on replacement.
Q2: Hydraulic motors on harvesters often suffer from RPM drops and overheating under heavy loads. How does Haozheng guarantee motor durability? A: RPM loss under high thermal pressure is caused by internal fluid slippage between the cylinder block and the valve plate. At Guangdong Haozheng, our cylinder barrels and valve plates are vacuum-sintered with high-purity bimetallic alloys and lap-fitted on dynamic CNC honing machines. Every motor is 100% dynamic load-tested on our test benches to confirm full volumetric torque before delivery.
Haozheng Hydraulic Production Processing Diagram
TESTING AND FINISHED PRODUCTS
The professional hydraulic quality inspection bench conducts various technical data inspections on the produced hydraulic pumps and motors to ensure that the products delivered to customers can be used with confidence!
Haozheng Hydraulic Honorary Certificate
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