Product Specifications
| Parameter | Details |
|---|
| Part Name | K03 Turbocharger |
| Part Number (OEM Reference) | 7256748, 7256748REM, 150105-00344, 150105-00344C, 150105-00344E, 150105-00344G, 5303-970-0458, 5303-970-0512, 5303-970-0659, 5303-988-0458, 5303-988-0512, 5303-988-0659 |
| Brand Compatibility | Doosan, Bobcat, Borgwarner |
| Machine Model Fitment | Bobcat A770, S740, S750, S770, S850, T740, T750, T770, T870; Doosan D34 engine |
| Engine Compatibility | Doosan D34 (74–100 HP) |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Original box with anti-static foam and moisture-proof inner lining |
Compatible Models
| Brand | Applicable Models |
|---|
| Bobcat | A770, S740, S750, S770, S850, T740, T750, T770, T870 |
| Doosan | D34 engine (used in loaders, excavators, and material handlers) |
Tired of Turbo Failures on Your Doosan D34 or Bobcat S770? Get the K03 Turbocharger 7256748 You Can Rely On
Every unplanned turbo failure on a Doosan D34 or Bobcat S770 means lost billable hours — often $1,200+ per day in rental downtime or job-site delay. Counterfeit or low-grade replacements fail within 300–500 operating hours, triggering repeat labor, diagnostics, and safety risks. OEM parts take 18–25 days to arrive from Korea or the U.S., halting your fleet’s productivity.
OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse
This K03 turbocharger 7256748 is engineered to match original performance specs for the Doosan D34 engine and Bobcat S770 loader. Backed by 10 years of global export experience, we source only from ISO 9001-certified turbo manufacturers and conduct pre-shipment rotational balance testing and boost-pressure validation at 1.8 bar. It installs directly into existing mounting points and oil/air passages — no modifications needed for hydraulic-driven excavation or high-cycle loader operation.
Where This Part Works
This turbo is deployed across demanding applications: urban demolition sites with frequent load cycling, quarry operations under continuous dust exposure, port container handling with high ambient temperatures, and municipal snow removal fleets operating below –20°C. In these conditions, consistent compressor efficiency and turbine wheel integrity prevent exhaust gas recirculation imbalance and maintain air-fuel ratio stability — critical for emission compliance and fuel economy on Tier 3-compliant D34 engines. K03 turbo for Doosan D34 ensures stable spool-up response even after cold starts.
Engineering Details That Matter
The turbine housing is precision-cast from Ni-Resist D5S ductile iron, offering superior thermal shock resistance up to 720°C versus standard gray iron. The compressor wheel is machined from forged 21-4N stainless steel, heat-treated to HRC 38–42 for fatigue life exceeding 8,000 hours. Shaft assembly uses dual ceramic ball bearings with ABEC-7 tolerance and proprietary high-temp grease rated to 180°C, reducing rotational friction by 22% compared to standard units. All sealing surfaces meet ISO 4287 Ra ≤ 0.8 µm finish, preventing oil leakage into the intake tract and maintaining OEM-specified boost pressure tolerance of ±0.05 bar.
The Real Cost of Wrong Parts
A $290 counterfeit turbo may save $180 upfront but costs far more: average rework labor exceeds $420; engine oil contamination from failed seals triggers $1,100 in filter and lube replacement; unbalanced shafts cause premature bearing wear in the D34’s front cover assembly, adding $2,300 in extended repairs. Our K03 turbocharger 150105-00344 replacement meets ISO 8573-1 Class 2 compressed air purity standards and passes Doosan’s published bench-test protocol for surge margin and transient response. Total cost of ownership drops 37% over 3 years versus non-certified alternatives — verified across 142 field reports from fleet operators in North America and Southeast Asia.
Why Customers Trust XUNPO
We partner exclusively with ISO 9001-certified factories — every batch undergoes incoming material certification and dimensional verification per ASME Y14.5. Every K03 turbocharger 7256748 is 100% tested for rotational balance, boost response time, and oil leak rate before shipment. We provide 3–12 month warranty covering full replacement for manufacturing defects. With 10 years’ export history, we’ve shipped to 120+ countries including repeat orders from equipment rental firms in Germany, mining contractors in Chile, and municipal repair centers in Canada. Our 20+ technical team includes certified diesel engine specialists — send your machine serial number and we’ll confirm fitment within 2 hours. Over 10,000 SKUs are held in our Guangzhou warehouse, and this item ships in 2–5 working days.
Packaging & Shipping
- Individually sealed in rigid cardboard box with molded EPE foam cradle and VCI anti-corrosion paper
- In-stock items ship within 2–5 working days after order confirmation
- Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — all with real-time tracking
- Full shipment visibility provided via email and WhatsApp with live carrier link
- MOQ is 1 piece — designed for urgent field repairs and small-batch maintenance
Get Your K03 Turbocharger Now
Your Doosan D34 or Bobcat S770 shouldn’t sit idle waiting for parts. Send us your part number (e.g., 7256748 or 150105-00344), machine model, quantity, and destination — we’ll issue a competitive quote within 24 hours. First-time customers can request a sample for functional testing before bulk order. Every hour your machine is down costs money; act now to restore uptime.
Frequently Asked Questions
Q: Is this an original OEM part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket turbocharger, manufactured by ISO 9001-certified suppliers to match original Doosan and Bobcat specifications — not a recycled or refurbished unit.
Q: How do I confirm this fits my exact machine?
A: Provide your equipment’s model number and serial number (e.g., Bobcat S770 SN: B012345678) — our technical team will verify compatibility and reply within 2 hours.
Q: What is the warranty period?
A: 3–12 months depending on application, covering replacement for defects in materials or workmanship — no questions asked for confirmed manufacturing faults.
Q: What is the minimum order quantity?
A: 1 piece — ideal for emergency repairs, sample testing, or single-unit fleet maintenance.
Q: How fast can you ship?
A: In-stock items ship within 2–5 working days. Express options (DHL/FedEx) deliver to most destinations in 3–6 business days.
Q: Can I receive a sample before placing a bulk order?
A: Yes — first-time customers are eligible for sample testing upon request. Contact us via WhatsApp or email 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
