STD 78mm Piston Ring Set 16292-21050 for Kubota D1105 Engine Rebuild

Product Specifications

Compatible Models

Tired of Engine Blow-by and Power Loss? Get the Right Kubota D1105 Piston Ring Set 16292-21050 for Reliable Rebuilds

Every hour a Kubota D1105-powered machine sits idle due to compression loss or oil consumption costs operators $280–$650 in lost productivity. Counterfeit piston rings fail within 200 operating hours—causing repeat disassembly, cylinder scoring, and unplanned downtime. OEM replacements take 18–26 days to arrive from Japan or the US, halting critical maintenance windows on farms, construction sites, and rental fleets.

OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse

This STD 78mm piston ring set is manufactured in ISO 9001-certified facilities under strict dimensional and metallurgical control. Each set undergoes dynamic tension testing and surface hardness verification before shipment—ensuring consistent sealing performance across all D1105 variants. It’s engineered for real-world engine rebuilds: whether rebuilding a B3030HSD tractor after 4,200 hours or overhauling a KX71 excavator hydraulic pump drive engine under high-load cyclic operation.

Where This Part Works

This piston ring set operates reliably in demanding environments: compact excavators digging in rocky soil, utility tractors plowing frozen fields, tracked dumpers hauling aggregate on steep grades, and zero-turn mowers cutting commercial lawns under continuous thermal cycling. In each application, the rings maintain cylinder wall contact at peak combustion pressures up to 12 MPa while resisting abrasive wear from dust-laden intake air—making correct fit and material integrity non-negotiable.

Engineering Details That Matter

The top compression ring is made from nodular cast iron with chrome-plated face—delivering 62 HRC surface hardness and reducing scuffing during cold starts. The second ring uses tapered face geometry to enhance oil control without excessive drag. The oil control ring features a three-piece design with spring-backed rails for uniform radial pressure across the full 78mm bore—even after 1,000+ thermal cycles. All rings are ground to ±0.005mm roundness tolerance and matched by weight within 0.3g per set to prevent crankshaft imbalance. Dimensional compliance with JIS B 8201-2016 ensures full interchangeability with original Kubota assemblies.

The Real Cost of Wrong Parts

A $12 counterfeit ring set may save $8 upfront—but leads to $2,400 in labor to re-bore cylinders, $1,100 in new liners and gaskets, and 3+ days of equipment downtime. Industry data shows that substandard rings increase oil consumption by 400% within 150 hours, accelerating bearing wear and triggering premature turbo failure. Total cost of ownership (TCO) for this certified aftermarket set is 63% lower than OEM over a 3-year service cycle—factoring in price, lead time, and field reliability. It meets ISO 6311:2020 standards for internal combustion engine piston rings.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in anti-corrosion oil, cushioned with molded EPE foam, and packed in reinforced corrugated cardboard box
• In-stock items ship within 2–5 working days after payment confirmation
• Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight options available
• Real-time tracking number provided upon dispatch
• Minimum order quantity: 1 set—designed for urgent repair needs

Get Your Kubota D1105 Piston Ring Set Now

Your engine rebuild can’t wait. Delaying the correct 78mm piston rings means extended downtime, rising labor costs, and risk of collateral damage. Send us your machine model (e.g., B3030HSD or KX71), required quantity, and destination—we’ll reply with a competitive quote within 24 hours. First-time buyers can request a sample set for physical verification before bulk order.

Frequently Asked Questions