STD 78mm 1 Set Piston Ring 16292-21050 for Kubota Engine D1105 Tractor B3030HSDC B3200HSD B2410HSD B2620HSD Excavator KX71 KX71H KX41-2 KX61-2

Product Specifications

Compatible Models

Tired of Engine Blow-by and Power Loss? Get the Right STD 78mm Piston Ring Set 16292-21050 for Your Kubota D1105 Engine Rebuild

Every hour your Kubota tractor or excavator sits idle due to compression loss costs hundreds in lost productivity. Counterfeit piston rings fail within 200 operating hours — causing oil consumption spikes, blue smoke, and unplanned engine teardowns. OEM replacements take 3 weeks to arrive, delaying critical field work across North America, Africa, and Southeast Asia.

OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse

This STD 78mm piston ring set is manufactured in ISO 9001-certified factories and tested for tensile strength, surface hardness, and dimensional accuracy before shipment. Designed specifically for Kubota D1105-series engines used in B3030HSD tractors and KX71 hydraulic excavators, it restores factory-level compression and reduces oil consumption by up to 40% after rebuild. With 10 years’ experience supplying 120+ countries, XUNPO maintains over 10,000 SKUs in stock — including this part — to support urgent engine rebuilds on construction sites and farms.

Where This Part Works

This piston ring set operates under high-temperature, high-pressure combustion cycles typical in agricultural and construction applications: rice paddy tillage, quarry loading, port material handling, and demolition site grading. In Kubota KX71 excavators working 12-hour shifts on rocky terrain, consistent ring tension and thermal expansion control are essential to prevent scuffing and maintain cylinder wall integrity over 5,000+ operating hours.

Engineering Details That Matter

The top compression ring features chrome-plated nodular cast iron (hardness 750–850 HV) for wear resistance against abrasive dust ingress. The second ring uses tapered face design to optimize oil control and reduce blow-by during transient load changes. All three rings meet Kubota’s original radial tension specification (12–15 N) to ensure proper seating without excessive cylinder wear. Dimensional tolerances are held to ±0.005 mm on bore diameter and ±0.01 mm on ring gap clearance — verified with digital calipers and gap gauges prior to packaging.

The Real Cost of Wrong Parts

A $25 counterfeit ring set may save $15 upfront but often causes repeat disassembly, new gasket kits, labor rework, and downtime exceeding $1,200 per day. Poorly heat-treated rings crack under thermal cycling, leading to piston seizure and crankcase contamination. This genuine aftermarket set meets ISO 6336 gear fatigue standards and Kubota D1105 service manual torque and clearance specs — reducing total cost of ownership (TCO) by extending rebuild intervals from 1,800 to 3,200 hours. It’s not just a part — it’s engineered reliability.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed blister pack with VCI anti-corrosion film + rigid cardboard outer box with foam padding
• In-stock items ship within 2–5 working days from Guangzhou
• Flexible logistics: DHL/FedEx/UPS express (3–7 days), air freight (7–12 days), sea freight (25–40 days)
• Real-time tracking number provided upon dispatch
• MOQ: 1 piece — supports emergency rebuilds and small workshops

Get Your Kubota D1105 Engine Rebuild Parts Now

Your equipment isn’t generating revenue while waiting for parts. Send us your machine model (e.g., B3030HSD), quantity, and destination — we’ll email a competitive quote within 24 hours. First-time buyers can request a sample set for physical verification before bulk order. Stock is limited — confirm availability today to avoid delays in your next engine overhaul.

Frequently Asked Questions