Cylinder Components
System-Matched Overhaul Rebuild Kit – Fits Kubota D902
<p>Oversize grades confirmed against your crankshaft regrind history before dispatch.</p>
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<p>Stop engine downtime from stripped or failed cylinder head bolts — this <strong>Kubota cylinder head bolt set for D662–DG972 engines</strong> delivers OEM-equivalent torque retention and thread integrity, even after multiple heat cycles. Built to Kubota’s original tensile specs (12.9-grade alloy steel with precise pitch and undercut geometry), it eliminates the risk of head gasket failure caused by inconsistent clamping force — a common issue with generic replacements.</p> <ul> <li>Fits 14+ Kubota engine variants including D662, DG972, DF972, and genset-specific models like D722-B-GENSET-2-S1</li> <li>Includes all 14 critical fasteners with correct length/strength differentiation: 14601-03450 (long), 14601-03452 (medium), 14601-03453 (short), and 1J080-03450 (special-length for front-mount applications)</li> <li>Pre-torqued and phosphate-coated for corrosion resistance and accurate installation — no need for additional lubricant or thread sealant</li> <li>Ships same-day from Guangzhou warehouse; MOQ is just 1 set, so you can verify fitment before stocking up</li> </ul>
MOQ
1 Piece
Lead Time
2-5 Business Days
Shipping
120+ Countries
Warranty
3-12 Months
Compatible Brands
| Parameter | Details |
|---|---|
| Part Name | Cylinder Head Bolt Set |
| Part Number (OEM Reference) | 14601-03450, 14601-03452, 14601-03453, 1J080-03450 |
| Brand Compatibility | Kubota |
| Machine Model Fitment | D662, D722, D782, D902, DF752, DF972, DG972, and compatible Kubota tractors, lawn tractors, generators, excavators, utility vehicles, compact loaders, and zero-turn mowers (full list below) |
| Material | High-tensile forged steel, ISO 898-1 Class 10.9 |
| Quantity per Set | 14 pcs |
| Condition | New aftermarket, OEM-equivalent |
| Warranty | 6-month warranty against manufacturing defects |
| Packaging | Original sealed polybag with printed part numbers, packed in reinforced corrugated box |
| Brand | Applicable Models |
|---|---|
| Kubota Tractor | B7300HSD, B7400HSD, B7410D, BX1500D, BX1800D, BX1830D, BX1850D, BX1860, BX1870, BX1870-1, BX1880, BX1880-1, BX2230D, BX2350D, BX2360, BX2370, BX2370-1, BX2380, BX2380-1, BX23S, BX23S-1, BX24D, BX25, BX25DLB, BX25DLB-1 |
| Kubota Lawn Tractor | G1700, G1800, G1800-S, G1900, G1900-S, G2000, G2000-S, G2160, G2160AU, G2160-DS, G2460G, G3200, G4200, G4200H, G5200H, G-5500S, G6200H, GR2100, GR2110, GR2120, GR2120-2, GR2120B, GR2120B-2, T1600H, T1600H-EUROPE, T1600H-G, TG1860 |
| Kubota Front-Mount Tractor | GF1800, GF1800E |
| Kubota Generator | GL-3500, GL11000, GL14000 |
| Kubota Excavator | U10-5, U15, U17, K-008, K008-3(KTC/KCL), K008-5, KH-007H, KX018-4, KX41-3 |
| Kubota Utility Vehicle | RTV900G, RTV900G6, RTV900G9, RTV900R6, RTV900R9, RTV900R-SD/R-SDL, RTV900T, RTV900T5-H/T2, RTV900T6, RTV900T9, RTV900W, RTV900W6, RTV900W6SE, RTV900W8SE, RTV900W9, RTV900W9SE, RTV900XTG, RTV900XTR, RTV900XTS, RTV900XTT, RTV900XTW, RTV-X900G, RTV-X900R, RTV-X900W |
| Kubota Stand-On Compact Loader | SCL1000 |
| Kubota Zero-Turn Mower | ZD1011, ZD1011-3, ZD1021, ZD1021-3, ZD18, ZD18F, ZD21, ZD21F, ZD221, ZD321, ZD321N, ZD323, ZG332LP, ZG332P, ZP330LP, ZP330P |
Every unscheduled engine shutdown costs operators $1,200–$3,500/day in idle labor, rental fees, and missed deadlines. Counterfeit or low-grade cylinder head bolts stretch under thermal cycling, causing head gasket blowouts, coolant leaks, and catastrophic engine failure. OEM replacements take 3–4 weeks to arrive — halting critical maintenance during peak season.
This 14-piece Kubota cylinder head bolt set delivers consistent clamping force across full operating temperature range (–20°C to +150°C), verified by pre-shipment torque and tensile testing. Built for heavy-duty applications including excavation, agricultural tilling, and generator duty cycles, it replaces 14601-03450 / 14601-03452 / 14601-03453 / 1J080-03450 across Kubota’s D662–DG972 engine family. Backed by 10 years of global export experience and 10,000+ SKUs in stock, we ship verified parts within 2–5 working days.
These bolts secure the cylinder head on Kubota engines powering equipment in high-vibration, high-dust environments: construction sites with daily 12-hour operation, quarrying applications with continuous load cycling, port material handlers exposed to salt air, and municipal snow removal fleets operating at sub-zero temperatures. In such conditions, inconsistent bolt yield strength or thread integrity directly compromises combustion chamber sealing — making precision-engineered fasteners non-negotiable.
Each bolt is forged from SCM435 alloy steel, quenched and tempered to 10.9 tensile class (minimum tensile strength 1000 MPa, yield strength ≥ 900 MPa). Threads are rolled after heat treatment — preserving grain flow and increasing fatigue resistance by 30% vs cut threads. Surface finish meets ISO 4042 with black oxide coating (≥ 48hr salt spray resistance) to prevent galvanic corrosion when mated with aluminum cylinder heads. Dimensional tolerance is held to ±0.05 mm on shank diameter and pitch diameter — ensuring full interchangeability with OEM assemblies without reaming or modification.
A $2.50 counterfeit bolt may save $15 upfront — but causes $2,800 in labor to replace a blown head gasket, $1,100 for coolant system flush, and $4,200 in downtime for a single-day delay on a municipal road repair contract. Our Kubota D662–DG972 cylinder head bolt kit complies with ISO 898-1 and meets Kubota’s original torque specification (78–82 N·m dry, no lubricant). Total cost of ownership drops 41% over 3 years compared to repeated failures from substandard fasteners — verified across 2,300+ field installations since 2022.
We source exclusively from ISO 9001-certified forging facilities with full traceability to raw material heats. Every batch undergoes incoming inspection for chemical composition (spectrometry) and hardness (Rockwell C). Before shipment, 100% of bolt sets pass torque verification and proof-load testing at 120% of rated yield. All units carry 6-month warranty covering replacement and return shipping for manufacturing defects. With 10 years’ experience serving 120+ countries, our 20-person technical team confirms part compatibility within 2 hours. Over 10,000 SKUs are held ready in our Guangzhou warehouse — enabling same-day dispatch for urgent repairs.
Your excavator or tractor isn’t generating revenue while waiting for parts. Send us your machine model (e.g., Kubota U15 or BX2370) and quantity — we’ll reply with a formal quote within 24 hours. First-time buyers can request a sample for physical verification before bulk ordering. Stock is available today; your order ships tomorrow.
Q: Is this an original Kubota part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket cylinder head bolt set, manufactured in ISO 9001-certified factories to match Kubota’s dimensional, material, and performance specifications.
Q: How do I confirm if these bolts fit my specific Kubota engine model?
A: Provide your exact engine model (e.g., DG972 or D662-BH) or machine serial number — our technical team verifies compatibility and replies within 2 hours.
Q: What is your warranty policy on this bolt set?
A: 6-month warranty covering manufacturing defects. If a bolt fails due to material or workmanship fault, we replace it free of charge with return shipping covered.
Q: What is the minimum order quantity?
A: 1 piece — no minimum. Ideal for urgent maintenance, small workshops, or sample validation.
Q: How long does shipping take?
A: In-stock items ship within 2–5 working days. Express options (DHL/FedEx) deliver to North America/Europe in 3–6 business days; air freight and sea freight timelines vary by destination.
Q: Can I receive a sample before placing a bulk order?
A: Yes — first-time customers may request one sample set for physical testing and fit 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: +86 187 2205 7128 | Email: talos@xunpojx.com
<p>Oversize grades confirmed against your crankshaft regrind history before dispatch.</p>
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View DetailsSend us your inquiry and our technical team will verify the part and provide a competitive quote within 24 hours. MOQ starts from 1 piece.
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