Kubota D902 Engine Piston STD 72mm (1 PC)
Product Overview
Upgrade or repair your Kubota D902 engine with this high-quality standard size (STD 72mm) piston. This single piston comes complete with the pin, essential for maintaining optimal engine compression and performance. Designed to meet or exceed OEM specifications, it is a reliable component for various Kubota applications.
Part Numbers: 1G826-21112, 1G826-21110
Quantity: 1 PC Piston with Pin

Product Specifications
Type: Piston with Pin
Size: Standard (STD)
Diameter: 72mm
Engine Model: Kubota D902, D902E
Part Numbers: 1G826-21112, 1G826-21110
Condition: New
Key Advantages & Selling Points
Precise Fit: Manufactured to exact STD 72mm specifications for a perfect fit in Kubota D902 engines.
Durability: Constructed from high-quality materials for long-lasting performance and resistance to wear under demanding conditions.
Complete Kit: Includes the piston pin, simplifying installation and ensuring proper assembly.
OEM Equivalent: Meets or exceeds original equipment manufacturer standards for reliability.
Restores Performance: Essential component for restoring lost compression and improving overall engine efficiency.
Applicable Equipment
This STD 72mm piston is compatible with Kubota D902 and D902E engines commonly found in the following equipment:
Kubota RTV900 Utility Vehicle
Kubota ZD323 Zero-Turn Mower
Kubota BX25 Tractor/Loader/Backhoe
Kubota BX2350D Tractor
Kubota U17 Excavator
Kubota KX018 Excavator
Kubota KX41 Excavator
Kubota KX41-3 Excavator
And other equipment utilizing the Kubota D902 / D902E engine.
Application Scenarios & Case Studies
The equipment powered by the Kubota D902 engine and using this piston is primarily used in compact construction, landscaping, agriculture, and utility applications.
Compact Excavators (U17, KX018, KX41): Used for trenching, digging foundations, site preparation, and landscaping in tight spaces where larger machinery cannot operate.
Case Study Example: A landscaping company using a KX018 noticed a drop in hydraulic power and engine performance. Diagnosis revealed a worn piston causing low compression. Replacing the STD piston restored engine power and efficiency, allowing the excavator to perform demanding digging tasks effectively.
Utility Vehicles (RTV900): Versatile vehicles used for transportation of materials and personnel on farms, construction sites, parks, and large properties. They handle various terrains and often tow trailers.
Case Study Example: An RTV900 used on a farm for daily chores started hard and lacked power on inclines. A failing piston was identified as the cause. Installing a new piston resolved the starting issues and restored the vehicle's capability to haul loads across varied farm terrain.
Tractors & Mowers (BX25, BX2350D, ZD323): Employed for mowing large areas, tilling, loader work, and other property maintenance tasks. The D902 provides reliable power for PTO-driven implements and hydraulic functions.
Case Study Example: A groundskeeping team experienced poor mowing performance and excessive smoke from their ZD323 mower. Inspection showed piston wear. Replacing the piston improved combustion efficiency, reduced emissions, and restored the mower's ability to maintain large turf areas cleanly and quickly.
Replacing a worn or damaged piston with a standard size one is a common repair to address issues like low compression, excessive oil consumption, smoking, and loss of power, ensuring the equipment can continue performing its intended tasks efficiently.
Related & Similar Products
For complete engine overhaul or related repairs, consider these other components for the Kubota D902 engine:
Piston Ring Set: Essential for sealing the combustion chamber and controlling oil. Available in STD and various oversize options (e.g., +0.25mm, +0.50mm) depending on cylinder wear.
Cylinder Liner / Sleeve: If cylinder walls are severely worn or damaged, replacing the liner is necessary. Available in STD size.
Connecting Rod: Connects the piston to the crankshaft. Can be replaced if bent or damaged.
Full Gasket Set: Includes all necessary gaskets and seals for a complete engine rebuild.
Main & Connecting Rod Bearings: Available in STD and various undersize options.
These related parts are typically applicable to the same Kubota D902 engine found in the RTV900, ZD323, BX25, BX2350D, U17, KX018, KX41, KX41-3 Excavator, and other compatible models.
Installation & Maintenance: Common Issues and Solutions
Proper installation and regular maintenance are crucial for the longevity of your engine and the new piston.
Issue: Incorrect Piston Orientation: Pistons have a specific orientation mark (usually on the top) indicating the front.
Solution: Always refer to the service manual for correct piston orientation during installation. Incorrect installation can cause engine damage.
Issue: Improper Ring Gap/Installation: Piston rings must be installed correctly with proper end gap clearance and staggered positions.
Solution: Measure ring gaps carefully according to specifications. Ensure rings are installed in the correct grooves and are not twisted or broken. Stagger ring end gaps around the piston circumference.
Issue: Cylinder Wall Condition: Installing a new piston in a worn or damaged cylinder will lead to premature failure.
Solution: Inspect cylinder walls for scoring, taper, or out-of-roundness. Hone the cylinders or install new liners if necessary before installing new pistons and rings.
Issue: Contamination: Dirt or debris during assembly can cause immediate damage.
Solution: Ensure all parts, tools, and the work area are spotlessly clean. Use clean engine oil for lubrication during assembly.
Issue: Incorrect Torque: Overtightening or undertightening connecting rod bolts can cause bearing or rod failure.
Solution: Always use a torque wrench and follow the manufacturer's specified torque sequence and values for connecting rod bolts.
Regular oil changes with the correct type of oil and filter, along with monitoring engine temperature and avoiding prolonged idling or overheating, are general maintenance practices that will help extend the life of your piston and engine.