Advance HCT800 Heavy Duty Marine Gearbox 6.86:1 Reduction

Description

Set up river towing propulsion with the Advance HCT800 Heavy Duty Marine Gearbox 6.86:1 Reduction. This two-stage marine gearbox is specified for heavy-duty towing and river transport, with a 6.86:1 reduction ratio, maximum input power of 1,440 HP (1,074 kW) at 1,800 RPM, and a maximum input speed of 2,100 RPM.

Model HCT800-686 pairs a hydraulic two-stage reducer clutch configuration with a listed transmission capacity of 0.80 HP/RPM (0.588 kW/RPM). The supplied product data identifies SAE 00 and SAE 0 bell housing standards, 31,473 lbf (140,000 N) maximum propeller thrust, a 17.72-inch (450 mm) center distance, and a 17.1-gallon (65-liter) oil capacity.

Key Features of Advance HCT800

• 6.86:1 reduction ratio provides the listed two-stage speed-reduction configuration for drivetrain matching.
• 1,440 HP (1,074 kW) maximum input power at 1,800 RPM identifies the stated engine-input rating.
• 2,100 RPM maximum input speed defines the listed operating-speed limit.
• 0.80 HP/RPM (0.588 kW/RPM) transmission capacity provides the supplied capacity specification.
• Hydraulic two-stage reducer clutch configuration identifies the stated transmission arrangement.
• SAE 00 and SAE 0 bell housing standards identify the listed engine-interface options.
• 31,473 lbf (140,000 N) maximum propeller thrust defines the listed thrust capacity.
• 17.72-inch (450 mm) center distance identifies the stated drivetrain geometry measurement.
• 17.1-gallon (65-liter) oil capacity provides the listed service-fill quantity.
• CCS and ZC approval are listed for this marine gearbox.

Fitment and Propulsion Use

The Advance HCT800-686 is specified for heavy-duty towing and river transport. It supports a propulsion layout requiring a 6.86:1 reduction ratio, within the listed 1,440 HP maximum input rating at 1,800 RPM and 2,100 RPM maximum input speed. 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 engine uses the required SAE 00 or SAE 0 bell housing interface, then verify engine-to-gearbox alignment, propeller-shaft geometry, structural mounting, and clearance for the 41.6 x 50.4 x 56.1 inch housing. Account for the 5,952 lb dry weight and 17.72-inch center distance. The supplied data lists a 17.1-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 HCT800

Verify that Advance model HCT800-686 matches your heavy-duty towing or river-transport propulsion system. Confirm the 6.86:1 reduction ratio, 0.80 HP/RPM (0.588 kW/RPM) transmission capacity, 1,440 HP (1,074 kW) maximum input power at 1,800 RPM, 2,100 RPM maximum input speed, hydraulic two-stage reducer clutch configuration, SAE 00/SAE 0 bell housing options, 31,473 lbf (140,000 N) maximum propeller thrust, 17.72-inch center distance, 17.1-gallon oil capacity, 41.6 x 50.4 x 56.1 inch dimensions, 5,952 lb dry weight, CCS/ZC approval, and 1-year limited warranty. Confirm compatibility with your engine manufacturer’s documentation before purchase.