Kubota D782 Engine Critical Components Overview

Maintain the reliable three-cylinder power of your Kubota D782 Diesel Engine, commonly found in compact tractors like the Kubota BX23 or utility vehicles. These precision parts are engineered for optimal fit, ensuring maximum compression and minimized blow-by.

• Kubota D782 Piston: A high-quality replacement piston, identified by Part Number 1G688-21112. The non-hyphenated equivalent is 1G68821112.

• Kubota D782 Piston Ring Set: Ensures a proper seal against the bore, matching OEM specification Part Number 16853-21050 (search term: 1685321050).

• We supply the complementary Cylinder Liner and the entire D782 Overhaul Gasket Kit to facilitate a complete, professional engine rebuild.

Rely on Honour Time Machinery Limited for robust Kubota Engine Parts and consistent performance in your Agricultural Equipment Maintenance.

Global Engine Component Exporter: Product Range and Long-Tail Keywords

As a key player in the heavy machinery parts supply chain, Honour Time Machinery Limited is your source for high-demand parts across multiple engine platforms:

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

Our core product offerings cover everything required for a full engine service, from Engine Total Assembly down to the smallest seal:

• Cylinder Liner (Wet and Dry)

• Piston (1G68821112)

• Piston Ring (1685321050)

• Crankshaft Main Bearing (Upper/Lower)

• Connecting Rod Bearing (Standard/Oversize)

• Thrust Washer (Axial Bearing)

• Engine Overhaul Gasket Kit (Top/Bottom Set)

• Diesel Injection Pump (Repair Kits)

• Fuel Injector (Nozzle/Assembly)

• Crankshaft (New and Used)

• Turbocharger (Cartridge/Complete)

• Water Pump (Engine Cooling)

• Oil Pump (Lubrication System)

• Cylinder Block (Bare or Complete)

• Cylinder Head (Loaded or Bare)

• Connecting Rod (Standard/Forged)

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Technical Component Glossary: Understanding Part Placement

Essential definitions for common heavy machinery engine parts and their location:

1. Camshaft: Located in the Engine Block or Cylinder Head. Cummins B6.7 Engine Camshaft Gear – Controls the opening and closing of the engine valves.

2. Rocker Arm Assembly: Situated on top of the Cylinder Head. Caterpillar C13 Engine Rocker Arm Bridge – Transfers the motion from the pushrod or camshaft lobe to the valve stem.

3. Pilot Bearing: Installed in the Center of the Crankshaft Flywheel End. Isuzu 4HK1 Engine Pilot Bearing – Supports the input shaft of the transmission.

4. Final Drive Seal Kit: Found within the Final Drive Housing. Komatsu D51EX Dozer Final Drive Seal Kit – Contains the seals required to prevent oil leaks in the final drive gearbox.

5. Relief Valve (Hydraulic): Located in the Main Control Valve Block or Hydraulic Pump. Caterpillar 336D Hydraulic Main Relief Valve – Limits the maximum pressure in the hydraulic system.

6. Fuel Filter Housing: Mounted on the Side of the Engine Block or Chassis. Yanmar 4TNV88 Fuel Water Separator Filter – Houses the element that removes contaminants from the diesel fuel.

7. Piston Cooling Jet: Bolted inside the Engine Block, pointing at the piston. Weichai WP12 Engine Piston Cooling Jet Nozzle – Sprays lubricating oil onto the underside of the piston for cooling.

8. Track Roller (Lower Roller): Located on the Bottom of the Undercarriage Frame. Komatsu PC400-8 Track Lower Roller Assembly – Supports the weight of the machine and guides the track chain.

9. Oil Cooler Assembly: Typically mounted on the Engine Block near the oil filter. Isuzu 6BG1 Oil Cooler Core Gasket – Reduces the temperature of the engine oil.

10. Thermostat Housing: Mounted on the Cylinder Head or Engine Block. Kubota D782 Engine Thermostat Housing – Holds the thermostat and is the connection point for the upper radiator hose.

Engineering Support: Common Engine Failure and Solution

Fault: Yanmar ViO35 Mini Excavator White/Blue Smoke and High Oil Consumption

Fault Detail:

A Yanmar ViO35 Mini Excavator, running a Yanmar 3TNV88 Engine, is consistently burning excessive amounts of engine oil, characterized by a blue/white smoke plume, particularly on startup or under load after idling.

Solution/Treatment Plan:

1. Check Valve Stem Seals: Excessive oil consumption and smoke on startup often point to failing Valve Stem Seals in the Yanmar 3TNV88 Cylinder Head. These seals allow oil to leak down the valve guides into the combustion chamber when the engine is shut down. Replace all valve stem seals.

2. Piston Ring Condition: Blue smoke under load indicates worn or stuck Piston Rings (like our Kubota 16853-21050 equivalent). Worn rings fail to scrape oil from the cylinder walls. A compression and leak-down test is crucial. If required, replace the Piston Ring Set and inspect the Cylinder Liner bore.

3. Turbocharger Inspection: If equipped, check the Turbocharger Shaft Seals. A failure here allows oil from the center section to enter the exhaust or intake manifold, causing significant smoke. The Yanmar Turbocharger Assembly may require a cartridge replacement.

Global Business: Contact Honour Time Machinery Limited

Whether you require a single Piston 1G688-21112 for your Kubota D782 or bulk supply of Cylinder Liners and Turbochargers for a fleet, Honour Time Machinery Limited offers superior quality components with transparent, efficient international logistics. Partner with the Source Manufacturer for all your engine needs.

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