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K03 Turbocharger 7256748 for Doosan D34 — compatible with Bobcat A770, S740, S750, S770, S850, T740, T750, T770, T870 loaders, delivering 74–100 HP exhaust flow recovery.
Dispatch window confirmed at order placement for this turbocharger replacement unit.
In Stock Now — K03 turbocharger units sitting on Guangzhou warehouse shelves, picked and boxed the same day the order clears.
| Parameter | Value |
|---|---|
| Part Number | 7256748 150105-00344 |
| Product Type | Turbocharger |
| Cross-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 (reference only) |
| Machine Fitment | Bobcat A770, S740, S750, S770, S850, T740, T750, T770, T870 |
| Turbo Model | K03 |
| Engine Compatibility | Doosan D34 (74–100 HP) |
| Condition | New Aftermarket |
| Manufacturing Standard | ISO-certified |
| Warranty | 3–12 months against manufacturing defects |
| MOQ | 1 piece |
| Failure Symptom | Replacement Urgency |
|---|---|
| Loss of boost pressure under load, black smoke from exhaust | Immediate — machine cannot complete work cycles at rated power |
| Whining or grinding noise from turbo housing bearing wear | High — continued operation risks shaft seizure and compressor wheel damage |
| Oil leak at turbo center cartridge seals | High — oil consumption spikes and contamination enters intake tract |
| Intermittent power drop during high-altitude or hot-weather operation | Moderate — schedule replacement before next heavy-duty shift |
| Excessive shaft play detected during routine inspection | Preventive — replace before catastrophic wheel-to-housing contact |
A K03 turbocharger 7256748 in stock ships the day paperwork clears — not next week, not after a production run finishes.
When a Bobcat S770 goes silent on a demolition site, the supervisor does not need a lecture on turbocharger aerodynamics. They need confirmation that the part is on a shelf, that someone can read a grease-covered nameplate photo, and that a tracking number will appear before the crew knocks off for the day. Waiting two or three days just to validate whether 150105-00344 is the right call for a specific D34 variant is two or three days the loader sits earning nothing [NEED_CITE: equipment downtime cost estimation methods for compact loaders]. The K03 turbocharger 7256748 in stock fast shipping replacement model exists to collapse that timeline from weeks to hours wherever logistics allow.
Availability means little if the wrong unit ships. Every K03 turbocharger 7256748 in stock request starts with fitment confirmation. Send us the machine model, the serial number, or a photograph of the old turbo nameplate — even if the paint has half-covered the stamping. We have watched Doosan D34 variants shift port orientation between production years, and shipping the wrong variant means the loader stays down while a return cycles through international freight.
Once the K03 7256748 turbocharger is picked, dispatch timing depends on the freight method chosen at quote stage. Express services reach most Asia-Pacific and Middle-East hubs within days; air freight covers longer distances within a typical window of one to two weeks; sea freight suits planned restocking rather than machine-down emergencies. We quote estimated arrival alongside the unit cost so the buyer knows the full timeline before committing [NEED_CITE: international freight transit time variables for heavy machinery parts]. Packaging is built for courier handling — the turbocharger is wrapped and braced to survive sorting facilities without housing or flange damage.
The K03 frame size determines compressor and turbine wheel geometry, which directly governs the airflow and exhaust energy recovery the Doosan D34 can sustain at its 74–100 HP output band. An undersized turbo in this application would lag at low RPM and choke at high load; an oversized unit would spool too slowly for the rapid throttle response a skid steer demands when cycling a bucket. The center cartridge bearing design governs shaft stability under the thermal cycling that happens every time the operator shuts a hot machine down without idle cool-off. Manufacturing to ISO-certified tolerances keeps compressor wheel balance within the range the D34 intake tract expects, reducing the vibration that accelerates bearing wear over hundreds of operating hours.
One wrong turbo variant delivered to site means the machine stays silent while the return ships back and the correct unit ships out. On a contracted demolition job, that round-trip can consume an entire work week. Even a turbo that physically bolts on but carries the wrong compressor trim will produce inadequate boost, forcing the D34 to run rich, loading the after-treatment system with soot it was never designed to handle [NEED_CITE: turbocharger mismatch effects on diesel after-treatment systems]. The hidden cost is never just the freight — it is the compounding idle hours and the downstream component stress that surfaces months later.
Own production lines and qualified sourced supply sit under one account with one warranty framework, so a single turbocharger order carries the same accountability as a hundred-piece fleet restock. The Guangzhou warehouse keeps fast-failure turbocharger SKUs on the shelf specifically because compact loader turbos fail without warning and buyers cannot wait for production lead times. One-piece minimum order means a contractor with a single downed S770 faces no MOQ barrier — the part ships alone if that is all the job needs. Part identification works from a part number, a machine model, a photograph, or a nameplate image, so a worn stamping does not block dispatch. Cross-reference verification covers superseded and alternate numbers, catching the cases where an older reference like 5303-970-0458 has been updated to a newer suffix variant that still fits the same D34 block.
Q: Is this K03 7256748 turbocharger in stock and when can it ship? A: Units are held in our Guangzhou warehouse for common Bobcat and Doosan D34 loader applications. Once fitment is confirmed through machine model or nameplate photo, the turbocharger is picked and handed to the carrier the same business day or the next, depending on the time the order is placed and the freight method selected.
Q: Can I order a single turbocharger for one downed machine? A: Yes. The minimum order is one piece. There is no bulk requirement and no surcharge for single-unit emergency orders. A contractor with one S770 offline gets the same dispatch priority and warranty terms as a distributor ordering for shelf stock.
Q: How long does shipping take by express, air, or sea? A: Express courier services typically deliver within days to most major markets. Air freight generally arrives within one to two weeks depending on destination and customs clearance speed. Sea freight takes considerably longer and is recommended for planned inventory rather than machine-down emergencies. We quote estimated arrival alongside the unit so you can plan accordingly.
Q: The turbo nameplate is worn or painted over — can I still confirm fitment? A: Yes. Send a clear photograph of the old turbocharger from multiple angles, along with the machine model such as S770 or T750. We cross-check housing dimensions, oil port position, and compressor trim against the D34 engine variant to identify the correct K03 unit even when the stamped number is unreadable.
Q: What if the turbocharger I receive does not fit my machine? A: Notify us immediately with photographs showing the fitment mismatch. We verify against the machine serial and engine build details provided at order stage. If the error is on our side, a replacement ships as soon as the discrepancy is confirmed, subject to stock availability and the same freight options.
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