Fukushima M 2703 hydraulic motor

The Fukushima M2703C Hydraulic Motor is a high-pressure radial piston hydraulic motor designed for heavy-duty marine and offshore applications. Manufactured by Fukushima Ltd. (Japan) under license from A/S Hydraulik Brattvaag (Norway), this motor is widely used in Brattvaag and Rolls-Royce / Kongsberg Maritime systems.

Known for its extreme durability, high torque output, and long service life, the M2703C is a trusted solution for deck machinery and winch systems on large vessels.

Technical Specifications

• Model / Type: M2703C

• Manufacturer: Fukushima Ltd., Japan

• Licensor: A/S Hydraulik Brattvaag, Norway

• Brattvaag / Rolls-Royce Connection: Fully compatible with Brattvaag systems; integrated into Rolls-Royce Marine / Kongsberg Maritime solutions

• Year of Manufacture: 1985

• Weight: Approx. 920 kg (2,028 lbs)

• Motor Design: Radial piston, high-pressure

• Operation: High torque, low-speed (HTLS)

• Mounting: Flange-mounted

• Shaft Type: Heavy-duty output shaft

• Hydraulic Media: Mineral hydraulic oil

• Duty: Continuous marine operation

Component Breakdown (Assembly Details)

1. Main Motor Housing

• Large circular ribbed casing

• Contains radial pistons

• Converts hydraulic pressure into rotational torque

2. Control Valve Block

• Mounted on the side with linkages

• Functions as directional & speed control valve

• Controls:

• Rotation direction (CW / CCW)

• Speed of motor

• Flow regulation

3. Brake Assembly

• Integrated hydraulic brake system

• Automatically releases when pressure is applied

• Ensures safe load holding

4. Output Shaft

• Heavy-duty shaft for power transmission

• Directly connected to:

• Winches

• Gearboxes

• Deck machinery

Working Principle

The M2703C uses a radial piston design, where multiple pistons are arranged around a central cam ring.

• Hydraulic oil enters the piston chambers

• Pistons push outward against the cam

• This generates rotational motion

• Result: Very high torque at low speed

Key Features

• High-pressure radial piston technology

• Extremely high torque output

• Smooth low-speed operation

• Integrated control valve system

• Built-in braking system

• Marine-grade heavy-duty construction

• Long service life (25+ years in vessels)

• ????? to corrosion and harsh environments

• Suitable for continuous duty

• Proven Brattvaag / Rolls-Royce compatibility

Applications

Marine Industry

• Anchor windlass systems

• Mooring winches

• Cargo winches

• Deck cranes

• Towing winches

Offshore

• Platform cranes

• Heavy-duty lifting systems

• Cable laying equipment

Fishing Industry

• Trawl winches

• Net haulers

Brattvaag / Rolls-Royce / Kongsberg Connection

The M2703C motor originates from A/S Hydraulik Brattvaag, a Norwegian company known for marine hydraulic systems.

• Later integrated into Rolls-Royce Marine

• Now part of Kongsberg Maritime

This makes the M2703C:

• Fully compatible with Brattvaag systems

• Used in Rolls-Royce deck machinery

• Supported in modern Kongsberg marine solutions

Advantages

• Reliable in extreme marine conditions

• High efficiency under heavy loads

• Minimal maintenance requirements

• Direct drive capability (no gearbox needed in many cases)

• Strong legacy support in marine industry

Maintenance & Spare Parts

Common Spare Parts

• Piston sets

• Cam ring

• Seal kits

• Bearings

• Valve block components

Maintenance Tips

• Use clean filtered hydraulic oil

• Replace seals during overhaul

• Inspect pistons and cam ring for wear

• Check brake system functionality

Global Supply – GANI MARINE EXPORTER

We supply:

• Fukushima hydraulic motors

• Brattvaag marine systems

• Rolls-Royce / Kongsberg spare parts

Global Export – Gani Marine Exporter