Product Specifications
| Parameter | Details |
|---|
| Part Name | STD 78mm Piston Ring Set |
| Part Number (OEM Reference) | 16292-21050, 16292-2105-0, 16261-21090, 16261-21091 |
| Brand Compatibility | Kubota |
| Engine Fitment | D1105, D1105-1, D1105-EB-J-1, D1105-E3B-SBFU-1, D1105-E2B-EU-X1, D1105-E2B-RSYH-1, D1105-E2BG-RAND-1, D11050-E2B-ATECNO-1, D1105-B(E) |
| Piston Bore Size | 78 mm / 78+0.5 mm |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Original sealed retail box with anti-rust paper and foam cushioning |
Compatible Models
| Brand | Applicable Models |
|---|
| Kubota Tractor | B2410HSD, B2410HSDB, B2410HSE, B26, B2620HSD, B2630HSD, B2910HSD, B3000HSDC, B3000HSDCC, B3030HSD, B3030HSDC, B3030HSDCC, B3200HSD, B3200HSDWO, B3300U, B3300SUHSD, B7610HSD, B7800HSD, ST-25, ST-30 |
| Kubota Mower | F2400, F2400-BI, F2560, F2560E, F2680E, F2880E-F, F2880-F, F3560, F3680, FZ2400, ZD28, ZD28F, ZD331LP, ZD331P |
| Kubota Excavator | KX41-2, KX41H, KX61(H), KX61-2, KX71, KX71-3 CABIN, KX71-3 CANOPY, KX71-3S CABIN, KX71-3S CANOPY, KX91-2, U25S, U-35(KTA), KX71H |
| Kubota Utility Vehicle | RTV1100CR, RTV1100CR9, RTV1100CRX, RTV1100CW, RTV1100CW9, RTV1100CWX, RTV1140CPX, RTV1140CPXR |
| Kubota Tracked Dumper | RG-30, RG-30L |
Tired of Engine Blow-by and Power Loss? Get the Right Kubota D1105 Piston Ring Set for Your B2620HSD or KX71 Excavator
Every unplanned engine shutdown costs operators thousands in downtime — especially during peak construction or harvest seasons. Counterfeit piston rings fail within weeks, causing oil consumption spikes, compression loss, and repeated teardowns. OEM parts for the D1105 engine often take 3+ weeks to arrive and cost up to 45% more than reliable alternatives. When your KX71 excavator or B2620HSD tractor is idle, revenue stops — and deadlines slip.
OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse
This STD 78mm piston ring set is manufactured in ISO-certified factories and undergoes pre-shipment performance validation to match original Kubota specifications. Designed specifically for D1105 engine rebuilds across tractors, excavators, and utility vehicles, it delivers consistent cylinder sealing under high-load operation — whether powering a KX71 on a demolition site or driving a B3200HSD through heavy tillage. With 10 years of global export experience and 10,000+ SKUs in stock, we ship verified parts fast — no waiting for overseas production runs.
Where This Part Works
This piston ring set operates reliably in demanding environments: earthmoving on construction sites, continuous duty at quarries, material handling in ports, and precision work on agricultural land. In these applications, cylinder pressure must remain stable above 35 bar during full-throttle operation; improper ring tension or bore mismatch leads directly to blow-by, overheating, and premature liner wear. It’s used not only in standard maintenance but also in full D1105 engine rebuild kits for KX71 excavator fleets and B2620HSD tractor service centers.
Engineering Details That Matter
The top compression ring features chrome-faced ductile iron with a precise 1.2–1.5 μm surface finish, ensuring optimal break-in and reduced scuffing during initial operation. The second ring uses tapered twist design for improved oil control and uniform contact pressure across the 78 mm bore. All rings meet JIS G5101 carbon steel standards and undergo double-tempering heat treatment (620°C + 580°C) for balanced hardness (HV 210–240) and fatigue resistance. Dimensional tolerances are held to ±0.005 mm on radial thickness and ±0.01 mm on gap clearance — critical for maintaining compression ratios within OEM-specified 22.5:1 for the D1105 engine.
The Real Cost of Wrong Parts
A $12 counterfeit ring set may seem economical — until it fails after 150 operating hours, triggering a $2,800 cylinder head reconditioning job and 3 days of machine downtime. Poorly heat-treated rings cause rapid bore scoring, requiring liner replacement. Incorrect gap clearance leads to ring butt-end collision and catastrophic seizure. Our STD 78mm piston ring set complies with ISO 6622-1 for reciprocating internal combustion engine rings and matches Kubota’s original dimensional and metallurgical specs — reducing total cost of ownership (TCO) by avoiding repeat labor, collateral damage, and schedule penalties.
Why Customers Trust XUNPO
We partner exclusively with ISO 9001-certified factories and perform incoming material inspection on every batch. Each piston ring set undergoes functional testing for tension, gap clearance, and surface integrity before shipment. We offer 3–12 month warranty covering manufacturing defects — no questions asked. With 10 years’ export experience serving clients in 120+ countries, our team includes 20+ mechanical engineers and parts specialists who verify compatibility within 2 hours. Over 10,000 SKUs are held ready in our Guangzhou warehouse — including this D1105 piston ring set — enabling 2–5 working day dispatch for urgent rebuilds.
Packaging & Shipping
- Individually sealed in anti-corrosion packaging with custom-cut EPE foam inside rigid kraft cardboard box
- In-stock items shipped within 2–5 working days after payment confirmation
- Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — all with real-time tracking
- Full shipment visibility from Guangzhou warehouse to your facility or workshop
- Minimum order quantity: 1 set — ideal for urgent field repairs or verification before bulk purchase
Get Your Kubota D1105 Piston Ring Set Now
Your D1105 engine rebuild can’t wait — every hour of delay adds cost. Send us your part number (e.g., 16292-21050), exact machine model (e.g., KX71 or B2620HSD), and required quantity. We’ll reply with a competitive quote within 24 hours — and first-time buyers may request a sample set for physical verification before placing a full order.
Frequently Asked Questions
Q: Is this an original Kubota part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket piston ring set, produced in ISO 9001-certified factories and validated to meet Kubota’s dimensional, material, and performance specifications for the D1105 engine.
Q: How do I confirm this fits my specific machine?
A: Provide your exact machine model (e.g., KX71-3S CABIN) and engine serial prefix if available — our technical team will verify compatibility and respond within 2 hours.
Q: What is the warranty period?
A: 3–12 months against manufacturing defects. If failure occurs due to material or workmanship issues, we provide free replacement or refund.
Q: What is the minimum order quantity?
A: 1 set — no bulk requirement. Ideal for urgent repairs, sample testing, or small fleet maintenance.
Q: How soon will my order ship?
A: In-stock orders ship within 2–5 working days. Express shipping options available for time-critical deliveries.
Q: Can I receive a sample before ordering in volume?
A: Yes — first-time customers may request one sample set for physical evaluation and fitment verification prior to bulk purchase.
Ready to order or need a quote?
Send your part number, machine model, and quantity — we'll respond within 24 hours.
WhatsApp: +86 13316055942 | Email: talos@xunpojx.com
