The essential solution for preventing engine overheating in your KUBOTA 1903, ensuring longevity and efficiency with OEM-standard parts.
As a source manufacturer and foreign trade exporter, we offer customized development for a wide range of engine cylinder liners. Trust our direct sales model for guaranteed quality and supply, from the raw material to the finished product. We provide high-quality liner kits for key models like the Cummins QSB6.7 Cylinder Liner Set, Komatsu 6D107 Cylinder Liner Kit, Caterpillar C7 Engine Cylinder Liner, and Isuzu 4HK1 Cylinder Liner Sleeve.
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Facebook Page (Click for dynamic content!)When operating heavy machinery like KUBOTA excavators or compact equipment, maintaining the engine's thermal stability is non-negotiable. A failing thermostat can lead to catastrophic engine failure. Our high-quality, aftermarket Kubota 1903 Thermostat, specifically designed as a reliable alternative to the OEM Part Number 15852-73030 (1585273030), is the definitive solution for cooling system issues. This precision-engineered part resolves common faults like engine running too cold or, critically, engine overheating, which often plagues older units. We specialize in robust, OEM-standard replacement components, serving the needs of the global construction machinery industry with parts for Cummins QSB6.7 engine overhaul parts and Komatsu 6D107 genuine replacement piston kits.
Engineered specifically for KUBOTA 1903 and compatible engine models (D1503, V2203).
Precision 76.5°C opening temperature to maintain optimal engine thermal management.
Direct, high-quality replacement for OEM Part Number 15852-73030 / 1585273030.
Constructed from durable brass and stainless steel for extended service life in harsh environments.
Essential component for preventing overheating and ensuring fuel efficiency in construction machinery.
| Model NO. | KUBOTA 1903 (D1503, V2203) |
| Product Name | Thermostat |
| OEM Part Number | 15852-73030 / 1585273030 |
| Application | Mini Excavator, Loader, Agricultural Machinery |
| Specification | Opening Temperature: 76.5°C, OEM Fit, High-Tolerance Brass Valve |
| Condition | New, Unused |
| Certification | ISO 9001 Compliant |
| Trademark | Honour Time Machinery (HTM) |
| Origin | China (Source Manufacturer) |
| Production Capacity | 5000 PCS/Year |
| Transport Package | Strong Carton Packaging |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | Express: DHL, FedEx, EMS, UPS or by Air/Sea |
Honour Time Machinery Limited specializes in supplying a full spectrum of high-demand engine components and assemblies. Our inventory includes: Caterpillar C7 engine cylinder head price components, Isuzu 4HK1 connecting rod bearing set, Kubota V1903 water pump replacement cost, and essential parts for Yanmar 4TNV98 diesel injector nozzle repair. We are your reliable source for engine liner kit factory direct sale and high-quality engine bearing supplier solutions.
| Component Type | Component Type |
| Liner Kit | Piston |
| Piston Ring | Overhaul Gasket Kit |
| Gasket Head | Crankshaft |
| Valve Guide | Nozzle (Injector) |
| Bearing (Crankshaft/Rod) | Pressure Switch |
| Flameout Solenoid | Monitor |
| Radiator | Main Valve |
| Belt | Engine Bearing |
| Cylinder Block | Valve Seat |
| Accelerator Motor | Transmitter |
| Fan Cooling | Connecting Rod |
| Brand | Popular Models |
| Komatsu | 3D82, 3D84, 4D105, 6D95, 6D108, 6D110, 4D84, 4D95, 6D102, 6D105, 6D114, 6D170 |
| Kobelco | J05E, 6D34T, 6D16, J08E, 6D22T, 6D24T, 6D16T, 6D34 |
| Caterpillar | 3114, 3116, C4, C6, 3064T, S6K, C7, C-9, C13 |
| Mitsubishi | 4D34, 4D24, K4M, S3Q2, 6D16, 6D24, S4KT, 6D40 |
| Isuzu | 3LD1, 4LE1, 4BG1, 4HK1, 6SD1, 6WG1, 4LE2, 4JB1, 6BG1, 6HK1, 6WF1 |
| Yanmar | 4D88E, 4TNE84, 4TNV88, 4TNV94L, 4TNE88, 4TNE94, 4TNV98, 4TNV106 |
| Hino | J05E, J08E, V25C, EF750, P11C, V21C, H06CT, H07D |
| Cummins | QSB6.7, QSM11-C, B5.9-C, B3.9-C, QSM11, C8.3-C |
| Volvo | D6D, D6E, D9E, D12D, D7D, D7E, D12E, D16D |
Turbocharger (Exhaust/Intake System): Increases engine power by forcing extra air into the combustion chamber. Keyword: Cummins QSB6.7 Turbocharger.
Piston Ring (Cylinder): Seals the combustion chamber, transfers heat, and regulates oil consumption. Keyword: Komatsu 6D107 Piston Ring.
Connecting Rod (Between Piston and Crankshaft): Transfers force from the piston to the crankshaft. Keyword: Caterpillar C7 Connecting Rod.
Crankshaft (Engine Block - Bottom): Converts the linear motion of the pistons into rotational motion. Keyword: Isuzu 4HK1 Crankshaft.
Water Pump (Cooling System): Circulates coolant between the engine block and the radiator. Keyword: Kubota V1903 Water Pump.
Flameout Solenoid (Fuel System): Controls the fuel supply to shut down the engine. Keyword: Yanmar 4TNV98 Flameout Solenoid.
Overhaul Gasket Kit (Engine Block/Head): A set of gaskets and seals needed for a complete engine rebuild. Keyword: Weichai WP10 Overhaul Gasket Kit.
Diesel Pump (Fuel System): Pressurizes and delivers diesel fuel to the injectors. Keyword: Cummins B5.9-C Diesel Pump.
Valve Guide (Cylinder Head): Provides a bearing surface for the valve stem. Keyword: Komatsu 4D95 Valve Guide.
Thrust Washer (Crankshaft Assembly): Controls the crankshaft's axial movement (end play). Keyword: Caterpillar 3116 Thrust Washer.
A frequent issue with the Komatsu PC200-8 (Engine: SAA6D107E-1) is sudden engine overheating. While many factors contribute, a stuck or failed thermostat (similar to a faulty Kubota 1903 Thermostat 15852-73030) is a primary culprit. If the thermostat fails to open, coolant circulation is blocked.
Implement a strict 500-hour coolant change interval using OEM-specified coolant. More importantly, we recommend replacing the thermostat, along with the Excavator engine full gasket kit components, proactively during every major engine service. This ensures the engine's thermal regulation is always optimal, significantly extending the life of your Caterpillar S6K engine assembly price investment and preventing costly downtime.
Honour Time Machinery Limited is a source manufacturer and trusted global supplier of OEM-standard diesel engine parts, specializing in components for Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai, ensuring reliable performance and export-grade quality.
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