ZF Marine KH 680 CP Propeller Maintenance and Operation Manual – YUEXIN 2ND LH + RH

Description

ZF Marine KH 680 CP Propeller Maintenance and Operation Manual

This is the complete maintenance and operation manual for the ZF Marine KH 680 controllable pitch propeller system supplied for the YUEXIN 2ND LEFT and RIGHT project. Issued by ZF Padova S.p.A., this document provides the technical information required by shipyards, ship’s staff, superintendents, and dry-dock supervisory personnel for safe installation, onboard operation, and routine shipboard maintenance of the KH 680 CP propeller system.

The manual covers both the left-hand and right-hand units under CPP numbers CPP00374-375, order number 8042/07 LH + RH, built by Yuexin Shipyard under hull number YX3099. It is written for the KH 680 propeller with four blades, 2650 mm diameter, CU3 hub and blade material, and OMC hydraulic coupling. Every section is presented with detailed technical illustrations, exploded views, hydraulic schematics, and step-by-step procedures.

File Details

• Manual Type: Maintenance and Operation Manual
• Brand: ZF Marine
• Propeller Model: KH 680 CP Propeller
• Project: YUEXIN 2ND LEFT + RIGHT KH 680
• CPP Numbers: CPP00374-375
• Order Number: 8042/07 LH + RH
• Shipyard: Yuexin Shipyard
• Hull Number: YX3099
• Classification: BV-NO ICE
• Language: English
• Page Count: 336
• File Format: PDF

Chapters Covered

• Section 1 — After Receipt of Equipment: General inspection, upon receipt of goods, shafting conservation, hydraulic machinery storage, remote control system storage and fitting-out period.
• Section 2 — Concept of the ZF Marine KH-Type CP Propellers: General principles of the mechanism, advantages of the CP propeller, maneuvering characteristics, stopping distance, zero pitch, direction of rotation, system components.
• Section 3 — Main Data: Vessel data, CPP data, gearbox data, propeller shaft data, stern tube data, remote control system port number.
• Section 4 — Propeller Hub Type KH: Hub body, servo cylinder, blade carrier, pilot operated non-return valve, sealing system (piston seal, piston rod seal, blade foot seal), bolts and dowels.
• Section 5 — Oil Distribution Box Type ODT: Functions, general arrangement, oil distributor, feedback section, operation.
• Section 6 — Propulsion Shafting: Shafting, servo oil tubes, hydraulic couplings type OMC, stern tube, ancillary shaft line components, shaft line analysis.
• Section 7 — Hydraulic System Operation: General, hydraulic system components, connections, system operation (normal and emergency), power pack description.
• Section 8 — Remote Control System: Follow-up control, back-up control, optional functions, combinator curves.
• Section 9 — Installation Description for Shipyard: Stern tube installation, propeller shaft and hub installation, blade installation, hydraulic coupling installation, gap/sag alignment, propeller shaft grounding, OD box installation, hydraulic system installation, electronic remote control system installation, pre-installation checklist, tools list, blade bolt torque.
• Section 10 — Setting the System to Work and Maintenance Procedures: Start-up procedures, special start-up instructions, maintenance schedule, fault finding procedures, propeller blade repair.
• Section 11 — Commissioning: Dock trial program, initial inspection for ZF Marine service engineer, function test, interfaces, after launching, sea acceptance test procedure.
• Section 12 — Appendices: Controls, hydraulics, stern tube, seals and bearings, shaft alignment calculation.
• Section 13 — Drawings: Assembly hub left and right, assembly OD box, locking device for installation, outline drawing, shaft line left and right, piping diagram single pipe.

This manual is not a generic overview. It is a full workshop and onboard reference that walks through every major system of the KH 680 CP propeller: the hub-integrated servo mechanism with pin-slot actuation, the bronze cast cylinder and piston assembly, the oil distribution box that feeds hydraulic pressure into the rotating shaft line, the hydraulic power pack with its variable displacement pumps and backup hand pump, and the digital remote control system with follow-up and back-up control modes.

Detailed attention is given to the sealing systems — piston seal, piston rod seal, and blade foot seal — which are critical barriers between the sea and the oil-filled hub. The manual explains the PONRV (pilot operated non-return valve) that maintains pitch in the last ordered position during a black-out, and the hydraulic coupling installation procedure using SKF high-pressure injector pumps.

Installation coverage is extensive. It includes stern tube alignment and resin mounting, propeller shaft lifting and insertion through the stern tube, blade mounting with torque values, hydraulic coupling drive-up procedure with pressure and time specifications, GAP and SAG alignment methodology with jacking verification, and OD box assembly with run-out tolerances. The pre-installation checklist and tools list give the shipyard a clear sequence to follow before commissioning.

Maintenance and troubleshooting sections provide daily, weekly, six-month, and dry-docking interval actions, plus fault-finding procedures for pitch movement failures, excessive stern tube oil use, and propeller blade damage. The commissioning section includes dock trial and sea acceptance test programs that can be used as inspection templates.

What This Manual Enables You to Do

• Install the KH 680 CP propeller system correctly, including stern tube, shaft line, hub, blades, and hydraulic coupling.
• Align the gearbox to the propeller shaft using GAP/SAG values and verify with jacking tests.
• Start up and operate the hydraulic power pack, bleed the system, and test pitch movement in ahead and astern directions.
• Maintain the system according to scheduled intervals and recognize early signs of wear or leakage.
• Troubleshoot pitch movement failures, oil pressure problems, and stern tube oil consumption.
• Understand the remote control system, combinator curves, load control, and back-up operation.
• Commission the system with function tests, alarm checks, and sea acceptance procedures.

For ship engineers, marine superintendents, shipyard fitters, and dry-dock supervisors, having the correct procedures and specifications on hand reduces the risk of improper installation, extends the service life of the CP propeller system, and supports safe, efficient vessel operation.

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