Description

The ZF Marine 3312199031 Transmission Filter Kit is an original-equipment transmission oil filter kit used on select ZF Hurth marine gearboxes. This drop-in style filter helps maintain clean transmission fluid flow and protects internal gearbox components from contamination during normal operation. Current references identify this kit as a ZF transmission filter with O-rings and a direct service replacement for compatible ZF 45, 63, 68, 80, and 85 series marine transmissions.

Key Features

• Original-equipment ZF Marine / ZF Hurth transmission filter kit.
• Drop-in style transmission oil filter.
• Supplied with O-rings for proper service replacement.
• Designed for compatible ZF marine gearbox oil-filtration applications.
• Commonly referenced for ZF 45, ZF 63, ZF 68, ZF 80, and ZF 85 transmission families.
• Helps protect marine transmission internals from oil contamination and wear.
• Filter housing may also be identified with 3312301037 stamped on it.

Engine Compatibility

This filter kit is used on compatible ZF Hurth marine transmissions, including many ZF 45A / IV, ZF 63 / 63A / 63IV, ZF 68A / IV, ZF 80A / IV, and ZF 85A / IV applications. Additional references also list compatibility with ZF 25A units from specified serial-number ranges and Hurth HSW 250, HSW 450, HSW 630, and HSW 800 family gearboxes. Fitment references do not consistently confirm ZF 88, so ZF 88 applications should be verified by transmission model tag or parts lookup before ordering.

Serial Number Fitment Notice

Transmission filter fitment should be confirmed using the gearbox model tag, serial number, existing filter number, or OEM parts lookup. ZF Hurth gearboxes can vary by ratio, housing version, fluid specification, and production range, so matching the transmission family alone is not always enough.

When This Part Needs Replacement

Replace this transmission filter during scheduled gearbox service, after initial break-in service on a new or rebuilt transmission, when fluid contamination is found, or whenever the transmission fluid is being changed after overheating, water intrusion, clutch material contamination, or heavy-duty operation. ZF service references commonly call for filter replacement after the first service interval and then at regular annual or hour-based service intervals.

Installation Notes

Drain or control fluid before removing the filter cover, then replace the filter and O-rings together. Lightly lubricate new O-rings with clean transmission fluid before installation, seat the filter correctly, and refill only with the fluid type specified for the exact gearbox model. After service, run the transmission, check for leaks, confirm proper fluid level according to the ZF procedure, and recheck after the transmission reaches operating temperature.

Alternate/Superseded Part Numbers

• 3312199031
• 3312 199 031
• 3312.199.031
• 3312301037
• 3312301007
• Hurth 463772
• ZF 978.26.610.01
• Crusader RP077011
• Indmar 905005
• Mercury 463772
• Pleasurecraft Marine / PCM RP077011
• Volvo Penta 3582069
• DriveForce 107691 / 107692

Parts Desk Insight

The important check with this filter is the transmission model tag, not just the engine brand. Many engines were paired with different ZF or Hurth gearboxes over the years, and the correct filter depends on the gearbox installed behind the engine.

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