Alto 316807AB Hurth 630V1 / ZF 63IV V-Drive Gasket & Seal Kit | Pump Gasket | Shaft Seals | O-Rings

Alto 316807AB — Hurth 630V1 / ZF 63IV V-Drive Gasket & Seal Kit | Pump Gasket | Shaft Seals | O-Rings

Alto 316807AB is a complete gasket and seal kit for the Hurth 630V1 and ZF 63IV V-Drive marine transmissions. The Hurth 630V1 and ZF 63IV are the same transmission unit — Hurth marine transmissions were acquired by ZF, and both brand designations remain in active use. Note that "63IV" uses a Roman numeral — this is the ZF 63 IV (fourth series), not the ZF 6314. Confirm your transmission model designation before ordering. This kit includes the pump and control valve gasket, all necessary O-rings, input shaft sealing rings, and input and output shaft seals required for a complete gasket and seal service on this transmission. Alto Products Corp. is a leading manufacturer of marine transmission gasket and seal kits for Hurth, ZF, Velvet Drive, and related applications.

Confirm Fitment Before Ordering

Not sure this is the correct gasket and seal kit for your transmission? Contact us before ordering — have your transmission model and serial number ready. Our team can confirm the correct kit for your specific Hurth or ZF application by email, text, or live chat.

Part Specifications

• Alto Part Number: 316807AB
• Application: Hurth 630V1 and ZF 63IV V-Drive marine transmission
• Kit Contents:
  • Pump and control valve gasket
  • Necessary O-rings
  • Input shaft sealing rings
  • Input shaft seal
  • Output shaft seal
• Vendor: Alto Products Corp.

Additional Information

• Vendor: Alto Products Corp.
• Part Number: 316807AB
• Application: Hurth 630V1 / ZF 63IV V-Drive
• Kit Contents: Pump & control valve gasket, O-rings, input shaft sealing rings, input & output shaft seals

Installation Notes

Installation should be performed by a qualified marine transmission technician following the applicable Hurth 630V1 / ZF 63IV service manual. Replace all gaskets and seals included in this kit during service — reusing previously installed sealing components compromises the integrity of the repair.

Frequently Asked Questions

Q: Does Alto 316807AB fit both the Hurth 630V1 and the ZF 63IV?
A: Yes — the Hurth 630V1 and ZF 63IV are the same transmission. ZF acquired Hurth and continued to support and supply parts for these transmissions under the ZF brand. Alto 316807AB covers both brand designations.

Q: What is included in the Alto 316807AB gasket and seal kit?
A: Alto 316807AB includes the pump and control valve gasket, all necessary O-rings, input shaft sealing rings, and input and output shaft seals for the Hurth 630V1 / ZF 63IV V-Drive transmission.

Q: Is "ZF 63IV" the same as "ZF 6314"?
A: No — "63IV" uses a Roman numeral (IV = 4), designating the fourth series of the ZF 63 transmission family. Confirm your exact transmission model designation against your service documentation or hull plate before ordering.

Q: When should I replace the gaskets and seals on my Hurth 630V1 or ZF 63IV?
A: Gaskets and seals should be replaced any time the transmission is disassembled for service, when external fluid leaks are present at the shaft exits or control block, or when seals are found worn, hardened, or damaged during inspection. Replacing the complete kit during any major service avoids repeat disassembly.

Q: Does this kit include all the seals needed for a complete transmission overhaul?
A: Alto 316807AB covers the pump and control valve gasket, O-rings, shaft sealing rings, and input and output shaft seals. For a complete overhaul that also includes friction and clutch components, contact us to confirm whether a more comprehensive kit is available for the Hurth 630V1 / ZF 63IV.