Z482 D722 D782 Piston Ring Set 16645-21050 16851-21050 16851-21052 16853-21050 for Kubota Diesel

Product Details

Product Overview

This piston ring set is engineered for precision fitment in Kubota Z482, D722, and D782 diesel engines. Designed for high-wear applications in construction and agricultural machinery, these rings restore compression, reduce oil consumption, and extend engine service life. The set includes OEM cross-reference numbers 16645-21050, 16851-21050, 16851-21052, and 16853-21050, ensuring compatibility with original equipment specifications.

Manufactured to OEM size standards, these piston rings are suitable for use in forklifts, excavators, loaders, bulldozers, trucks, buses, and other heavy equipment powered by Kubota’s compact diesel engine family. Each ring is produced with strict dimensional tolerances to guarantee proper ring groove fitment and optimal sealing performance.

Key Features & Benefits

• OEM-Spec Dimensions: Manufactured to exact OEM size for reliable fitment in Z482, D722, and D782 engine cylinders without modification
• Comprehensive Kit: Includes all necessary rings (compression, oil control) for a complete piston rebuild on compatible Kubota engines
• Durable Material Composition: Constructed from wear-resistant materials to withstand high combustion pressures and temperatures in diesel applications
• Reduced Oil Consumption: Precision-ground oil control rings minimize blow-by and maintain proper lubrication film thickness
• Easy Identification: Each ring is clearly marked with part numbers for quick verification against OEM specifications
• Cost-Effective Rebuild Solution: Provides a reliable alternative to OEM parts without compromising performance or longevity

Technical Specifications

OEM Cross-Reference

This piston ring set replaces the following original Kubota part numbers:

• 16645-21050 – Main compression ring set for D722/D782
• 16851-21050 – Oil ring assembly for Z482/D722
• 16851-21052 – Alternative oil ring configuration for D722
• 16853-21050 – Complete ring set for D782 engines

These numbers correspond to genuine Kubota service parts. Always verify your engine’s serial number and existing ring dimensions before ordering to ensure correct fitment.

Compatibility

This piston ring set is commonly used for the following Kubota engine models and applications:

• Engine Models: Kubota Z482, D722, D782
• Vehicle/Equipment Types: Forklifts, Excavators, Loaders, Bulldozers, Trucks, Buses, Agricultural tractors, Generators, and Industrial pumps
• Note: Fitment is based on engine model compatibility. Always confirm your specific engine displacement and cylinder bore diameter before purchase.

Global Supply & Distribution

We ship these piston ring sets worldwide with reliable logistics partners. Our distribution network covers:

• North America: Fast delivery to major ports (Los Angeles, Houston, New York) and industrial centers
• Europe: Regular shipments to Rotterdam, Hamburg, and inland destinations
• Asia-Pacific: Direct service to Singapore, Tokyo, Shanghai, and Sydney
• Middle East & Africa: Available for Dubai, Jeddah, and key African ports
• South America: Delivery to Santos, Buenos Aires, and major industrial zones

We maintain export documentation for smooth customs clearance and offer bulk order discounts for fleet maintenance programs.

Quality Assurance

• Manufacturing Standards: Produced under ISO 9001-certified facilities in Guangdong, China
• Testing: Each batch undergoes dimensional inspection, hardness testing, and surface finish verification
• Warranty: 6-month warranty against manufacturing defects (within 6 months of purchase)
• Documentation: Machinery Test Report and Video Outgoing Inspection available upon request
• Traceability: All parts are batch-numbered for full quality traceability

FAQ

Q1: Will these piston rings fit my Kubota D722 engine with a different cylinder bore size?

These rings are manufactured to OEM standard size (nominal bore). If your engine has been previously rebored or honed to an oversize, these rings may not fit correctly. We recommend measuring your cylinder bore diameter and comparing it to the OEM specification (typically 72mm for D722) before ordering. For oversized applications, please contact us with your exact bore size.

Q2: What is the recommended installation procedure for these piston rings?

Installation should follow standard diesel engine rebuild procedures: clean ring grooves thoroughly, check ring end gap in the cylinder bore (typically 0.2-0.4mm for compression rings), and stagger ring gaps 120° apart during assembly. Use a ring compressor tool to avoid damaging rings or piston. Always lubricate rings with clean engine oil before installation. We recommend consulting the Kubota service manual for your specific engine model.

Q3: How do I identify which of the four part numbers (16645-21050, 16851-21050, etc.) I need?

Check your engine’s data plate or previous service records for the original part number. The 16645-21050 is the most common compression ring set for D722/D782. The 16851-21050 and 16851-21052 are oil ring assemblies (note: 16851-21052 is a later revision). The 16853-21050 is a complete set for D782. If unsure, provide us with your engine model and serial number, and we can cross-reference the correct set for your application.