K25 Piston Liner Kit 12010-fu522 12010-fu420 Engine Rebuild Kit For Nissan Forklift TCM

Product Details

Product Overview

This comprehensive K25 Piston Liner Kit is a critical engine rebuild solution designed for Nissan and TCM forklifts and fork trucks. The kit includes the cylinder sleeve (part number 12010-fu522), piston, piston rings, and pin, providing all the core components necessary for a complete cylinder overhaul. Manufactured by, this kit is a high-performance aftermarket alternative to the original Nissan parts, ensuring your material handling equipment returns to peak operational efficiency.

Specifically engineered for the Nissan K25 diesel engine, this rebuild kit is commonly used in popular forklift models like the Nissan FD30, FD35, and TCM FB25. By replacing worn pistons and cylinder liners, this kit restores compression, reduces oil consumption, and eliminates blow-by, significantly extending the service life of your engine. The kit is supplied at standard size (STD), making it suitable for a direct replacement in engines that have not been previously overbored.

Key Features & Benefits

• Complete Overhaul Solution: Includes the piston, cylinder liner, piston rings, and piston pin in one convenient kit, simplifying procurement and ensuring component compatibility.
• Precision Engineering: Manufactured from a durable combination of aluminum alloy (piston), cast iron (liner), and steel (rings & pin) to withstand the high compression and thermal stresses of diesel engine operation.
• OEM-Spec Dimensions: Supplied in Standard Size (STD) with exact tolerances matching the original Nissan specifications for a direct, hassle-free installation.
• Enhanced Engine Performance: Restores factory compression ratios, reduces blow-by, and minimizes oil consumption, leading to smoother operation and lower running costs.
• Rigorous Quality Control: Each kit undergoes outgoing video inspection and machinery test reporting to verify critical dimensions and surface finishes before shipment.

Technical Specifications

OEM Cross-Reference

This rebuild kit directly replaces the following original Nissan part numbers:

• Nissan OEM: 12010-fu522
• Alternative OEM: 12010-fu420

Note: These numbers correspond to the cylinder liner and piston assembly components for the K25 engine. Always verify your original part number before ordering.

Compatibility

This kit is specifically designed for the Nissan K25 diesel engine. It is commonly used for the following applications:

• Forklift Models: Nissan FD30, FD35, FD40 series; TCM FB25, FG25 series
• Machine Type: Fork Truck, Industrial Machinery

Important Fitment Note: This is a standard size (STD) kit. It is intended for engines with cylinder bores within factory specification. If the cylinder block has been previously machined, this STD kit may not fit correctly. Always measure the cylinder bore diameter before ordering.

Global Supply & Distribution

maintains a robust global supply chain to serve B2B clients worldwide. We offer flexible shipping options to meet your project timelines:

• Worldwide Coverage: We export to North America, Europe, Southeast Asia, the Middle East, Africa, and Oceania.
• Fast Delivery: Stock items are dispatched within 24-48 hours. Express shipping (DHL, FedEx, UPS) is available for urgent orders to major industrial hubs.
• Bulk Logistics: For container orders, we coordinate sea freight to major ports (e.g., Los Angeles, Rotterdam, Singapore, Dubai) with competitive freight rates.
• Trade Compliance: All products are exported with full commercial documentation, including packing lists, invoices, and certificates of origin as required.

Quality Assurance

Every K25 Piston Liner Kit is manufactured under strict quality control protocols:

• Material Certification: Raw materials (aluminum, cast iron, steel) are sourced from certified suppliers and tested for hardness and composition.
• Dimensional Inspection: Each piston and liner is checked for roundness, taper, and surface finish using precision gauges.
• Testing: Machinery Test Reports are provided with each shipment, and outgoing video inspections are available upon request for quality verification.
• Warranty: We stand behind our products with a 6-month to 1-year warranty against manufacturing defects.

FAQ

Q: Will this kit fit my Nissan FD30 forklift with a K25 engine?
A: Yes, this rebuild kit is specifically designed for the Nissan K25 engine, which is commonly used in FD30 series forklifts. However, we strongly recommend verifying your engine serial number and the original part number (12010-fu522 or 12010-fu420) on your old components before purchasing to ensure a perfect match.

Q: What is included in this “Piston Liner Kit”? Are there any missing parts I need to buy separately?
A: This kit includes the cylinder liner (sleeve), piston, piston rings, and piston pin. For a complete top-end rebuild, you will likely need to purchase a separate gasket set, main bearings, and connecting rod bearings. We recommend ordering a full overhaul gasket set alongside this kit for a comprehensive rebuild.

Q: What is the installation clearance for the piston rings in this STD kit?
A: For standard size (STD) pistons and rings in a K25 engine, the typical ring end gap should be between 0.25mm and 0.45mm for the top compression ring, and 0.20mm to 0.40mm for the second compression ring. Oil ring gaps are usually larger. Always refer to the Nissan K25 service manual for exact specifications and use a feeler gauge to verify clearances during installation.