Advance D300A Heavy Duty Marine Gearbox 6.56:1 Reduction

Description

Pair harbor-duty propulsion with the Advance D300A Heavy Duty Marine Gearbox 6.56:1 Reduction. This heavy-duty marine transmission is specified for harbor tugs and commercial fishing applications, with a 6.56:1 reduction ratio, maximum input power of 737 HP (550 kW) at 2,400 RPM, and a maximum input speed of 2,400 RPM.

Model D300A-656 has a hydraulic power-shift clutch and a listed transmission capacity of 0.31 HP/RPM (0.23 kW/RPM). Its stated drivetrain specifications include SAE 0 and SAE 00 bell housing standards, 15,736 lbf (70,000 N) maximum propeller thrust, a 13.78-inch (350 mm) center distance, and a 5.28-gallon (20-liter) oil capacity.

Key Features of Advance D300A

• 6.56:1 reduction ratio identifies the listed speed-reduction configuration for the vessel drivetrain.
• 737 HP (550 kW) maximum input power at 2,400 RPM defines the listed engine-input rating.
• 2,400 RPM maximum input speed provides the listed operating limit.
• 0.31 HP/RPM (0.23 kW/RPM) transmission capacity identifies the listed capacity specification.
• Hydraulic power-shift clutch provides the listed clutch configuration.
• SAE 0 and SAE 00 bell housing standards identify the listed engine-interface options.
• 15,736 lbf (70,000 N) maximum propeller thrust defines the listed thrust rating.
• 13.78-inch (350 mm) center distance supports drivetrain-geometry verification.
• 5.28-gallon (20-liter) oil capacity identifies the listed lubricant fill quantity.
• 36.0 x 32.5 x 45.0 inch dimensions and 1,940 lb dry weight support installation planning.

Fitment and Propulsion Use

The Advance D300A-656 is specified for harbor tugs and commercial fishing vessels. It supports propulsion systems requiring a 6.56:1 reduction ratio, with the listed 737 HP maximum input rating at 2,400 RPM, 2,400 RPM input-speed limit, and SAE 0 or SAE 00 bell housing interface. Confirm fitment using the engine model, serial number, rated torque, operating RPM, reduction ratio, and manufacturer drivetrain documentation before ordering.

Installation and Service Considerations

Confirm that the selected SAE 0 or SAE 00 bell housing, engine output, shaft arrangement, and propeller-thrust requirement match the transmission design. Check available installation space for the 36.0 x 32.5 x 45.0 inch housing, 1,940 lb dry weight, and 13.78-inch center distance. the listed data lists a 5.28-gallon oil capacity. Follow the engine and gearbox manufacturer’s installation manuals and product instructions for alignment, lubrication, controls, cooling connections, and service procedures.

Before Ordering the Advance D300A

Verify that Advance model D300A-656 matches your harbor tug or commercial fishing vessel propulsion system. Confirm the 6.56:1 reduction ratio, 0.31 HP/RPM (0.23 kW/RPM) transmission capacity, 737 HP (550 kW) maximum input power at 2,400 RPM, 2,400 RPM maximum input speed, hydraulic power-shift clutch, SAE 0/SAE 00 bell housing options, 15,736 lbf (70,000 N) maximum propeller thrust, 13.78-inch center distance, 5.28-gallon oil capacity, 36.0 x 32.5 x 45.0 inch dimensions, 1,940 lb dry weight, CCS/ZC (ABS grade) classification, and 1-year limited warranty. Confirm compatibility with your engine manufacturer’s documentation before purchase.