Kubota V2003 Engine Piston and Ring Specifications

The Kubota V2003 Diesel Engine is a common power unit for compact machinery like the Kubota KX057-4 Mini Excavator. Utilizing high-quality components is crucial for maintaining engine compression and maximizing efficiency after an Engine Overhaul.

• Kubota V2003 Piston: High-strength aluminum alloy, precisely matched to Part Number 1G770-21110. The non-hyphenated equivalent is 1G77021110.

• Kubota V2003 Piston Ring Set: Ensures crucial oil scraping and compression, corresponding to Part Number 1A024-21050 (searchable as 1A02421050).

• We supply full engine parts, including Thrust Washers, Crankshafts, and complete V2003 Overhaul Gasket Sets.

Trust Honour Time Machinery Limited for all your Kubota Engine Parts needs, ensuring powerful Mini Excavator Rebuilding.

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As a global source and exporter, Honour Time Machinery Limited is the premier supplier for Engine Total Assembly and components for leading brands:

Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai.

Our core engine component offerings guarantee comprehensive repair solutions:

• Cylinder Liner (High-precision bore)

• Piston (1G77021110)

• Piston Ring (1A02421050)

• Crankshaft Main Bearing (Critical lower end)

• Connecting Rod Bearing (Precision shells)

• Thrust Washer (Crankshaft axial control)

• Engine Overhaul Gasket Kit (Full sealing solution)

• Diesel Pump (Fuel metering)

• Fuel Injector (Combustion input)

• Crankshaft (Power output)

• Turbocharger (Power boosting)

• Water Pump (Cooling system)

• Oil Pump (Lubrication system)

• Cylinder Block (Bare or long block)

• Cylinder Head (Valve mechanism)

• Connecting Rod (Piston-to-crank linkage)

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Construction Machinery Component Glossary: Function and Location

Definitions for 10 key engine and machine components, detailing their location and providing a specific equipment example:

1. Track Roller (Lower Roller): Supports the weight of the machine and guides the track chain, located on the Undercarriage Frame. Komatsu PC40MR-3 Track Roller Group – Facilitates smooth movement over uneven ground.

2. Final Drive Seal Kit: Seals the planetary gears inside the Final Drive Housing. Caterpillar D5K2 Final Drive Oil Seal – Prevents oil leakage from the gear reduction unit.

3. Fuel Lift Pump (Diaphragm): Mechanically actuated pump, located on the side of the Engine Block/Injection Pump. Isuzu 4BG1 Engine Mechanical Fuel Pump – Draws fuel from the tank to the injection pump.

4. Valve Seat Insert: Pressed into the Cylinder Head where the valve head seals. Kubota V2003 Engine Valve Seat Ring – Provides a durable seating surface for the intake/exhaust valves.

5. Oil Pressure Regulator Valve: Located inside the Oil Pump or the Engine Block Oil Gallery. Yanmar 4TNV94 Engine Oil Pressure Relief Valve – Maintains consistent oil pressure throughout the engine.

6. Thermostat: Located inside the Thermostat Housing, connecting to the Cylinder Head. Weichai WP4 Engine Coolant Thermostat – Controls coolant flow to maintain optimal engine temperature.

7. Camshaft Bushing: Supports the Camshaft rotation, pressed into the Engine Block. Cummins QSL9 Camshaft Bushing Set – Provides a bearing surface for the camshaft lobes.

8. Swing Bearing (Slewing Ring): A large bearing that connects the Upper Structure to the Undercarriage. Komatsu PC200-8 Swing Bearing Bolt Kit – Allows the upper part of the excavator to rotate 360 degrees.

9. Hydraulic Pump Regulator: Part of the control system on the Main Hydraulic Pump. Caterpillar 330D Hydraulic Pump Regulator Solenoid – Adjusts the pump's output flow (swash plate angle).

10. Turbocharger Compressor Wheel: Located in the Cold (Intake) Side of the Turbocharger Housing. Isuzu 6HK1 Turbocharger Compressor Impeller – Draws in and compresses fresh air for the engine.

Technical Service Insight: Engine Overheating

Fault: Caterpillar D5K2 Dozer Engine Runs Hot Under Load

Fault Detail:

A Caterpillar D5K2 Dozer (C4.4 ACERT Engine) experiences rising engine temperatures whenever it is pushing heavy material (under high load), but cools down when idling. Coolant level is correct.

Solution/Treatment Plan:

1. Clean Cooling System Radiator/Coolers: On construction equipment, the most common cause is restricted airflow. Thoroughly clean the exterior of the Radiator, Hydraulic Oil Cooler, and Air-to-Air Aftercooler (ATAAC) fins, which can be clogged by dirt and debris (especially common on dozers).

2. Inspect Fan Drive/Clutch: If equipped with a cooling fan clutch, check its engagement. The fan must run at high speed under load. A slipping Caterpillar Cooling Fan Clutch or a damaged Fan Belt will reduce cooling capacity, especially when the engine needs it most.

3. Check Water Pump Efficiency: If external cooling is confirmed, the internal circulation may be faulty. A worn Water Pump Impeller (a part we supply) or a stuck Thermostat can restrict coolant flow. Replace the Caterpillar Water Pump Total Assembly if the impeller shows signs of corrosion or cavitation, or replace the thermostat to ensure it is fully opening.

Connect with Honour Time Machinery Limited: Your Global Component Partner

For certified, high-quality engine components, including the heavy-duty Kubota V2003 Piston 1G770-21110 and the precision Ring Set 1A024-21050, connect with Honour Time Machinery Limited. We are your dedicated Source Manufacturer, guaranteeing Factory Direct pricing and expert support for all your Foreign Trade Export needs globally.

Global Supplier of Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, Weichai Parts and Assemblies.