ME100-C Eaton Vickers Motor | 276 Bar LSHT 434 Nm

Product Overview

The ME100-C is the smallest displacement model in Eaton Vickers’ DOWMAX ME series of axial piston low-speed high-torque motors, featuring a displacement of 99 cm³/rev (6.04 in³/rev), a JIS keyed shaft (C code) and manufacturer part number 134ME00007A. The DOWMAX ME series employs a unique double swash plate axial piston design where multiple opposed pistons work in conjunction with dual swash plates, enabling smooth rotation at speeds as low as 1 rev/min—one of the most capable low-speed hydraulic motor platforms on the market.

The ME series covers displacements from 99 to 4,097 cm³/rev across 13 frame sizes, with continuous working pressure of 250 bar (3,626 psi) and maximum pressure of 280 bar (4,061 psi), providing 100% interchangeable standard mounting interfaces. The series is suitable for open-circuit hydraulic systems, offering high starting torque, excellent overall efficiency and resistance to thermal shock, starting reliably in cold environments.

The model code breaks down as follows: ME identifies the DOWMAX ME series axial piston motor; 100 denotes the 99 cm³/rev displacement; C indicates the JIS keyed shaft type (with thread). The ME100-C is widely deployed in ship cranes, injection molding machines, tunnel boring machines, forging presses and metallurgical equipment, with its low-speed smooth operation, high power-to-volume ratio and dual-row piston cylinder design making it irreplaceable in heavy-duty industrial hydraulic systems.

Every ME100-C unit undergoes 100% simulated operating-condition bench testing prior to shipment. Mounting flange, shaft end and port dimensions comply with JIS/SAE standards and are identical to the original Eaton Vickers ME100-C, ensuring true drop-in interchangeability with zero modification required.

Technical Specifications

DOWMAX ME Series Frame Size Specifications:

• ME100 (This Model): Displacement 99 cm³/rev (6.04 in³/rev), rated pressure 276 bar (4,000 psi), peak pressure 324 bar (4,700 psi), rated torque 434 N·m (320 lb-ft), rated speed 1,000 rpm, max speed 1,000 rpm, max power 61 hp (45 kW), weight 18.28 kg (49 lbs)

• ME150: Displacement 152 cm³/rev (9.27 in³/rev), rated pressure 276 bar, peak pressure 324 bar, rated torque 668 N·m (492 lb-ft), rated speed 600 rpm, max speed 800 rpm, max power 56 hp, weight 34.3 kg (92 lbs)

• ME175: Displacement 175 cm³/rev (10.68 in³/rev), rated pressure 276 bar, peak pressure 324 bar, rated torque 769 N·m (566 lb-ft), rated speed 600 rpm, max speed 800 rpm, max power 65 hp, weight 34.3 kg (92 lbs)

• ME300B: Displacement 304 cm³/rev (18.55 in³/rev), rated pressure 276 bar, peak pressure 324 bar, rated torque 1,334 N·m (984 lb-ft), rated speed 600 rpm, max speed 800 rpm, max power 112 hp, weight 43.6 kg (117 lbs)

• ME350B: Displacement 350 cm³/rev (21.36 in³/rev), rated pressure 276 bar, peak pressure 324 bar, rated torque 1,536 N·m (1,133 lb-ft), rated speed 600 rpm, max speed 800 rpm, max power 129 hp, weight 43.6 kg (117 lbs)

• ME600A: Displacement 602 cm³/rev (36.74 in³/rev), rated pressure 276 bar, peak pressure 324 bar, rated torque 2,641 N·m (1,948 lb-ft), rated speed 450 rpm, max speed 600 rpm, max power 167 hp, weight 75.8 kg (203 lbs)

• ME750A: Displacement 750 cm³/rev (45.76 in³/rev), rated pressure 276 bar, peak pressure 324 bar, rated torque 3,289 N·m (2,426 lb-ft), rated speed 400 rpm, max speed 520 rpm, max power 185 hp, weight 98.9 kg (265 lbs)

• ME850: Displacement 847 cm³/rev (51.68 in³/rev), rated pressure 276 bar, peak pressure 324 bar, rated torque 3,715 N·m (2,740 lb-ft), rated speed 350 rpm, max speed 450 rpm, max power 183 hp, weight 98.9 kg (265 lbs)

• ME1300A: Displacement 1,345 cm³/rev (82.06 in³/rev), rated pressure 248 bar (3,600 psi), peak pressure 324 bar, rated torque 5,309 N·m (3,916 lb-ft), rated speed 200 rpm, max speed 390 rpm, max power 186 hp, weight 140 kg (375 lbs)

• ME1900: Displacement 1,868 cm³/rev (113.97 in³/rev), rated pressure 248 bar, peak pressure 324 bar, rated torque 7,373 N·m (5,438 lb-ft), rated speed 140 rpm, max speed 260 rpm, max power 173 hp, weight 222 kg (595 lbs)

ME100-C Additional Specifications:

• Model Code: ME100-C (corresponding part number 134ME00007A)

• Type: Axial piston motor, double swash plate design, multiple opposed pistons

• Displacement: 99 cm³/rev (6.04 in³/rev)

• Rated Working Pressure: 276 bar (4,000 psi / 27.6 MPa)

• Peak Pressure (Intermittent): 324 bar (4,700 psi / 32.4 MPa)

• Rated Torque: 434 N·m (320 lb-ft / 44 kgf·m)

• Rated Speed: 1,000 rpm

• Max Speed: 1,000 rpm

• Minimum Smooth Speed: 1 rev/min

• Max Power: 45 kW (61 hp)

• Rotation: Clockwise / counterclockwise (bidirectional optional)

• Shaft Type: JIS keyed shaft (with thread, C code)

• Seal Material: Buna N (standard)

• Port Type: Standard metric ports

• Design Generation: 1st design (no design change)

• Circuit Type: Open circuit

• Thermal Shock: Unaffected, suitable for cold-temperature starting

• Hydraulic Fluid: Mineral oil, water-glycol, phosphate ester

• Weight: 18.28 kg (40.3 lbs)

MB Series (with Mechanical Brake) Specifications:

• MB100: Displacement 99 cm³/rev, brake torque 294 N·m (MB100), C code for metric keyed shaft

• MB150 / MB175: Displacement 152 / 175 cm³/rev, brake torque 392 N·m (MB150A / MB175A)

• MB300 / MB350: Displacement 304 / 350 cm³/rev, with mechanical brake configuration

• MB Series Features: The DOWMAX MB series is an axial piston motor with mechanical brake, suitable for ship deck machinery, crane slewing drives and other applications requiring reliable parking brake

Key Technical Advantages

1. Double Swash Plate Axial Piston Design for Smooth Low-Speed Operation

The ME100-C employs Eaton DOWMAX’s signature double swash plate axial piston design, where multiple opposed pistons work with dual swash plates to enable smooth rotation at speeds as low as 1 rev/min with minimal torque ripple. This makes it irreplaceable in applications requiring precise low-speed control such as ship cranes and injection molding machines. The multi-piston and double swash plate layout effectively reduces operating noise and torque pulsation for quiet operation with high overall efficiency.

2. High Starting Torque and Wide Temperature Adaptability

DOWMAX ME series motors deliver high starting torque and excellent overall efficiency. The ME100-C produces high torque at startup with a rated torque of 434 N·m and maximum peak pressure of 324 bar, ensuring reliable starting under load. The motor uses a pressure-compensated flat valve plate design, unaffected by thermal shock and starting reliably in cold environments. The robust yet quiet construction with compact design facilitates easy installation.

3. Wide Fluid Compatibility and Modular Accessories

DOWMAX ME series motors operate with a wide range of fluids including mineral oil, water-glycol and phosphate ester hydraulic fluids. The ME100-C can be configured with rear cover relief valves, speed sensors, counterbalance valves and other accessories. The motor can be paired with friction brake assemblies and is available with encoder ports and speed sensor rear cover ports. These modular accessory options enable flexible adaptation to various system integration requirements.

4. Compact and Lightweight Design

The ME100-C is the most compact frame size in the entire DOWMAX ME series, weighing only 18.28 kg (49 lbs) with class-leading power density among comparable low-speed high-torque motors. Its small footprint and lightweight construction make it particularly suitable for space-constrained mobile equipment such as small ship deck machinery and compact industrial drive systems.

5. 100% Simulated Load Testing & Drop-In Interchangeability

Each ME100-C unit is bench-tested under simulated operating conditions prior to dispatch, covering pressure cycling, speed stepping and torque output. Mounting flange, shaft end and port dimensions comply with JIS/SAE standards, matching the original Eaton Vickers ME100-C exactly, enabling direct replacement without any interface modification.

Application Areas

The ME100-C and DOWMAX ME series motors are widely deployed across heavy-duty industrial and mobile hydraulic applications:

• Ship & Offshore: ship cranes, deck machinery, anchor winches, mooring winches, steering gear systems

• Construction: tunnel boring machines, rotary drill rig head drives, cranes, grapples, excavators, earth augers

• Injection Molding: mold clamping drives, injection drives with precise motion control and smooth low-speed operation

• Metallurgical: forging presses, high-speed forging equipment, rolling mill auxiliary drives, continuous casting machines

• Mining: subsurface drill rigs, heavy-duty handling equipment, crusher drives

• Industrial: conveyor/roller table drives, steel mill equipment, large coilers

• Locks & Dams: lock gate drive systems, sluice gate drive systems

Expert Maintenance Tips

1. Lubrication Management for Low-Speed Operation: The ME100-C’s core advantage is smooth operation at speeds down to 1 rev/min. Under extremely low-speed conditions, hydrodynamic oil film formation between pistons and swash plates is less favorable—ensure use of hydraulic oil with excellent extreme pressure and anti-wear properties. ISO VG46 or VG68 anti-wear hydraulic oil is recommended, with periodic oil analysis every 1,000 hours to monitor viscosity changes and additive depletion.

2. Periodic Piston Group and Swash Plate Inspection: The DOWMAX ME series’ double swash plates and multiple opposed pistons are primary wear components. Inspect piston-to-cylinder bore clearance, slipper wear and dual swash plate working surface condition every 2,000 hours. As the ME100-C employs a dual-row piston cylinder design, both piston rows require inspection. Abnormal efficiency loss, noise or vibration requires immediate shutdown and service. Use Eaton Vickers original specification parts when replacing piston groups.

3. Housing Priming Before First Startup: Before first startup, fill the motor housing with clean hydraulic oil through the drain port. An unprimed housing causes dry friction at startup, severely damaging the piston group and swash plate mechanism. After extended shutdown, fill the housing again before restarting. The drain port must return to the reservoir independently—housing back pressure must not exceed 2 bar. The drain line end must remain submerged to prevent air ingestion.

4. Oil Cleanliness and Temperature Control: Maintain system oil cleanliness at ISO 4406 18/16/13 or better. Operating oil temperature should be kept below 80°C. Replace hydraulic oil and filter after the first 500 hours, then follow a 2,000-hour or annual replacement cycle. When using water-glycol or phosphate ester hydraulic fluids, confirm seal material (Viton) compatibility with the working medium.

5. Cold Environment Starting Precautions: Although the ME100-C is unaffected by thermal shock and suitable for cold-temperature starting, run at low speed for warm-up before applying load during low-temperature startup. Use hydraulic fluid with appropriate low-temperature performance to ensure viscosity remains within permissible range during startup. Avoid applying full load directly at low temperatures to reduce initial wear on piston groups and swash plate mechanisms.