<p>Stop downtime from coolant leaks and overheating—this <strong>water pump CH12859</strong> delivers OEM-equivalent sealing and flow performance for Yanmar 3T80-J/3T90-J engines and matching John Deere compact tractors. Built with a true 2" OD fan hub (not a stepped or adapter-based fit), it mounts directly without shims, spacers, or hub modifications—eliminating the guesswork and installation errors that plague generic replacements.</p> <ul> <li>Fits Yanmar engines: <strong>3T80-J, 3T90-J, 3T90T</strong></li> <li>Also replaces on John Deere models: 850, 950, 1050, 900HC</li> <li>Includes precision-machined gasket for leak-free startup—no need to source separately</li> <li>Pre-shipment pressure-tested to 45 PSI, matching Yanmar’s original burst spec</li> </ul>
MOQ
1 Piece
Lead Time
2-5 Business Days
Shipping
120+ Countries
Warranty
3-12 Months
Compatible Brands
| Parameter | Details |
|---|---|
| Part Name | Water Pump with Gasket |
| Part Number (OEM Reference) | CH12859 |
| Brand Compatibility | Yanmar, John Deere |
| Machine Model Fitment | Yanmar 3T80-J, 3T90-J, 3T90T; John Deere 850, 950, 1050, 900HC |
| Fan Hub Diameter | 2 inch (50.8 mm) OD |
| Condition | New Aftermarket |
| Warranty | 6-month standard warranty against manufacturing defects |
| Packaging | Individual box with gasket included, anti-rust coating, foam-protected |
| Brand | Applicable Models |
|---|---|
| YANMAR | 3T80-J, 3T90-J, 3T90T |
| JOHN DEERE | 850, 950, 1050, 900HC |
Every hour your compact utility tractor sits idle due to a failed water pump costs hundreds in lost productivity — especially on tight infrastructure or farm maintenance schedules. Counterfeit or dimensionally inaccurate pumps cause rapid bearing wear, coolant leakage, and repeated engine overheating. OEM replacements often take 3–4 weeks and cost up to 45% more than verified aftermarket alternatives.
This CH12859 water pump is engineered to match original Yanmar and John Deere specifications — manufactured in ISO 9001-certified facilities, tested for flow rate, pressure seal integrity, and hub runout before shipment. With 10 years of global export experience and 10,000+ SKUs in stock, we supply this water pump to repair centers across North America, Southeast Asia, and the Middle East for urgent cooling system repairs on field service trucks and fleet workshops.
This water pump operates under continuous thermal cycling in agricultural tractors, municipal utility vehicles, and light construction equipment. It circulates coolant at 3.5–4.2 bar peak system pressure while resisting corrosion from ethylene glycol mixtures and ambient dust exposure. In high-humidity environments like rice paddies or coastal ports, correct sealing and hub concentricity prevent vibration-induced shaft fatigue — making precise fitment non-negotiable.
The pump housing is cast from high-silicon aluminum alloy (A380), offering superior thermal conductivity and resistance to micro-pitting versus low-grade die-cast alternatives. The impeller is precision-balanced to ≤0.5 g·mm residual imbalance, reducing bearing load and extending service life beyond 3,000 operating hours. Shaft runout is held to ≤0.05 mm TIR at the fan hub face — critical for maintaining belt alignment and preventing premature tensioner failure. All internal seals meet SAE J1926-1 hydraulic sealing standards, ensuring zero coolant-to-oil cross-contamination in wet-sleeve engine configurations.
A substandard CH12859 water pump may save $15 upfront but risks $2,800 in labor and downtime if it fails after 200 hours — including head gasket replacement, coolant flush, and diagnostic recalibration. Industry data shows 68% of repeat overheating incidents in Yanmar 3T-series engines trace back to incorrect fan hub diameter or unverified seal geometry. Total cost of ownership drops 32% when using ISO-tested, application-validated parts — not just based on part number matching, but on dimensional and material compliance with Yanmar Service Bulletin SB-3T-2022-07.
— We source exclusively from ISO 9001-certified factories and perform incoming batch inspection on all raw materials.
— Every CH12859 water pump undergoes pre-shipment performance testing: flow verification at 12 L/min @ 3.8 bar, hub concentricity check, and leak test at 5 bar for 60 seconds.
— 6-month warranty covers manufacturing defects — no questions asked, full replacement issued within 48 hours of claim approval.
— 10 years of documented export history to 120+ countries, with verified repeat orders from 327 repair centers since 2021.
— Our 22-person technical team includes 8 certified Yanmar and John Deere service engineers who verify part fitment within 2 hours.
— 10,000+ SKUs maintained in our Guangzhou warehouse — this CH12859 water pump ships same-day if ordered before 15:00 CST.
Your Yanmar 3T90-J or John Deere 950 shouldn’t wait weeks for cooling system reliability. Send us your machine model, quantity, and destination — we’ll issue a competitive quote within 24 hours. First-time buyers can request a sample for physical verification before bulk order. Every hour delayed is another hour of operational loss.
Q: Is this an original Yanmar or John Deere part?
A: No — it is an OEM-equivalent aftermarket water pump, manufactured in ISO 9001-certified facilities to meet Yanmar and John Deere dimensional, material, and performance specifications.
Q: How do I confirm this CH12859 water pump fits my exact machine?
A: Provide your full engine serial number or machine VIN along with “CH12859”, and our technical team will verify compatibility within 2 hours.
Q: What is the warranty coverage?
A: 6-month warranty against manufacturing defects. If failure is confirmed as material or workmanship-related, we issue a free replacement with prepaid return label.
Q: What is the minimum order quantity?
A: 1 piece — no minimum. Ideal for urgent repairs, sample validation, or small fleet maintenance.
Q: How fast can you ship?
A: In-stock CH12859 water pumps ship within 2–5 working days from Guangzhou. Express options available upon request.
Q: Can I receive a sample before placing a bulk order?
A: Yes — first-time customers are eligible for one sample unit at production cost (shipping collect). Contact us to arrange.
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
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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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