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Kubota V3800-T Engine DENSO High-pressure oil pump 1J508-50500 / 1J508-50501
Electronically Controlled High-Pressure Common Rail System Version
Equipped with the V3800-CR-T engine; commonly found in newer models of excavators (e.g., Bobcat, Zoomlion, Kubota KX080), skid-steer loaders (e.g., SVL95-2), and high-horsepower tractors.
Mainstream pump models: DENSO HP3 / HP5S fuel supply pumps.
Common part numbers: 1J508-50500 / 1J508-50501 1J574-50501 1J502-50501 1J500-50505
Mechanical Direct Injection Version
Suitable for mechanical V3800-DI-T engines (KX080-3 excavators or M8540/M9540 tractors).
Common part numbers: 1G514-51010 / 1G514-51012 / 1G514-51016 1C010-51010 / 1K012-51010
Cross-Brand (Cross-Equipment) Part Number Cross-Reference Table
| DENSO Part No. (OEM) | KUBOTA Part No. | BOBCAT Part No. | CAT Part No. | Common Applications |
|---|---|---|---|---|
| 294000-1730 / 294000-1731 |
1J502-50501 / 1J502-50504 |
7024366 | 377-6956 | Bobcat Skid Steer Loaders S750, T750, T870; Caterpillar Wheel Loaders 910K, 914K, etc. |
| HP5S-0020 | 1J508-50500 / 1J508-50501 |
N/A | N/A | Kubota Track Loaders SVL95-2, SVL97-2; Kubota Tractor M4-91, etc. |
| 294000-069# | 1J574-50501 | N/A | N/A | Kubota High-Horsepower Tractors M108X, M9540, etc. |
DETAILS
| DESCRIPTION | High-pressure oil pump | PART NUMBER | 1J508-50500 / 1J508-50501 |
| WEIGHT | 5 kg | VOLUME | 240 mm × 160 mm × 150 mm |
| TRUCK MOLDE | Kubota | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | ENGINE |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
Fault Symptoms and Core Component Maintenance
1. Difficulty Starting / Insufficient Power: In common-rail models, abnormal rail pressure is often caused by a sticking or worn metering valve (SCV/PCV valve); typically, the metering valve can be replaced individually without needing to replace the entire fuel pump assembly.
2. Black Smoke / Unstable Idle (Hunting): For mechanical pumps, issues usually stem from wear on internal plunger assemblies or delivery valves; for common-rail pumps, it is crucial to check the associated common-rail injectors (e.g., 1J574-53051) for excessive fuel return flow.
3. Strict Diesel Filtration Requirements: The Kubota V3800 common-rail system is highly sensitive and requires the use of genuine, high-precision diesel filter elements; water contamination or the use of low-quality diesel can cause rapid wear and seizure of the fuel pump plungers.
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