Description
ZF 550 1.5 Gearbox
The ZF 550 with a 1.5:1 gear ratio is a robust, hydraulically shifted marine transmission designed for high-power commercial and pleasure craft applications, handling engine power up to roughly 449 kW (600+ hp) at 1800 rpm depending on the duty cycle.
- Design: Lightweight, sea-water-resistant aluminum alloy housing.
- Clutch Control: Reliable hydraulic shifting equipped with ZF Supershift control.
- Thrust Bearing: Designed to handle maximum propeller thrust in both ahead and astern directions.
- Capabilities: Includes an emergency “get home” feature and equal torque capacity in both directions for twin-engine setups.
- Model: ZF 550 Series
- Reduction Ratio: ~1.5:1 (exact configurations vary slightly by specific variant like A-V)
- Application: Inboard diesel propulsion systems matching heavy-duty or pleasure-duty ratings
Common Viscosity: Most heavy-duty marine applications in this class utilize high-quality, high-performance SAE 30 or SAE 40 single-grade (monograde) engine oils rather than standard automotive ATFs, though you must verify your regional climate operating temperature profile
Oil Capacity: 16.0 Liters (17.0 US Quarts). Note: This applies to a standard gearbox configuration without specialized optionals. Always use the dipstick for the final fill level
Strict Prohibition: Do not use oil additives. Any aftermarket additives change the friction coefficients in ways that can cause the multi-disc hydraulic clutches to fail or slip.
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