LR4105 Diesel Engine Piston Assembly Kit 105mm Bore for YTO Tractor Repair Parts

Product Details

Product Overview

This high-quality LR4105 Diesel Engine Piston Assembly Kit is a direct replacement component designed for YTO tractor engines and compatible industrial applications. The kit features a precision-engineered 105mm bore diameter piston, manufactured from high-strength aluminum alloy to ensure durability and consistent performance under heavy load conditions.

Engineered for LR4105, LR4105T, and LR4105G engine models, this piston assembly includes the piston pin and retaining clips for a complete installation solution. Commonly used in YTO agricultural tractors, wheeled loaders, and generator sets, this kit provides a reliable repair option for maintaining engine compression and power output.

Each piston is manufactured with strict quality control measures, including outgoing video inspection and machinery test reports, ensuring that every component meets the required specifications for professional engine rebuilding.

Key Features & Benefits

• Precision 105mm Bore Diameter: Exact match for LR4105 series engines, ensuring proper cylinder wall clearance and optimal compression ratios.
• High-Strength Aluminum Alloy Construction: Cast from durable materials to withstand high combustion temperatures and pressures, reducing wear and extending service life.
• Complete Kit Assembly: Includes piston, wrist pin (36mm diameter), and retaining clips – everything needed for a single-cylinder rebuild.
• Optimized Combustion Chamber: 58mm chamber depth and 111mm total height engineered for efficient fuel burn and reduced emissions.
• Three-Ring Groove Design: Precisely machined 3.0mm x 3.0mm x 5.0mm ring grooves accommodate standard compression and oil control rings for reliable sealing.
• Verified Fitment: Compatible with YTO tractors and equipment using LR4105, LR4105T, or LR4105G engines, backed by outgoing inspection reports.
• Cost-Effective Repair Solution: OEM-quality replacement at competitive pricing, ideal for fleet maintenance and workshop rebuilds.

Technical Specifications

OEM Cross-Reference

This piston assembly is designed as a direct replacement for the following OEM and aftermarket part numbers:

• YTO OEM: LR4105-1004021 (Standard Piston Assembly)
• Alternative: 4105-1004021A (Aftermarket equivalent)
• Compatible with: LR4105T Turbocharged variants
• Compatible with: LR4105G Generator set engines

Compatibility

This piston kit is commonly used for the following engine models and applications:

• Engine Models: LR4105, LR4105T, LR4105G
• Agricultural Tractors: YTO series tractors (including LX, MF, and XT models) equipped with LR4105 engines
• Construction Equipment: Wheeled loaders and backhoes using LR4105 power units
• Industrial Applications: Generator sets and stationary engines

Note: Please verify your engine model and specifications before ordering. This kit is intended for engines requiring 105mm bore pistons with 36mm wrist pins.

Global Supply & Distribution

We offer worldwide shipping capabilities to meet the demands of international B2B buyers. Our distribution network covers major markets including:

• North America: Regular shipments to United States, Canada, and Mexico ports
• Europe: Fast delivery to Rotterdam, Hamburg, and major European industrial hubs
• Asia-Pacific: Direct service to Australia, New Zealand, and Southeast Asian markets
• Middle East & Africa: Reliable shipping to UAE, Saudi Arabia, Egypt, and South Africa
• South America: Regular exports to Brazil, Argentina, and Chile

Our logistics team ensures efficient handling of both small orders and bulk container shipments, with typical lead times of 7-15 days for air freight and 20-35 days for sea freight. We maintain export compliance documentation for smooth customs clearance worldwide.

Quality Assurance

Each LR4105 piston assembly undergoes rigorous quality control procedures to ensure reliable performance in demanding applications:

• Material Certification: High-strength aluminum alloy sourced from certified suppliers with documented chemical composition
• Dimensional Accuracy: Every piston is measured for bore diameter (105mm ±0.02mm), pin bore alignment, and ring groove dimensions
• Visual Inspection: Video outgoing inspection records are available upon request for each batch
• Machinery Test Report: Provided to confirm proper fitment and functional performance
• Warranty Coverage: Standard 6-month warranty against manufacturing defects, with optional 12-month coverage available for qualifying orders
• Manufacturing Standards: Produced in ISO-compliant facilities in Guangdong, China, with traceable production batches

FAQ

Q1: How do I verify this piston kit is compatible with my LR4105 engine?

To confirm compatibility, check your engine’s cylinder bore diameter (must be 105mm) and wrist pin diameter (36mm). Additionally, measure the piston total height (111mm) and combustion chamber depth (58mm). If your existing piston matches these specifications, this kit will fit. For YTO tractors, verify your engine model plate shows LR4105, LR4105T, or LR4105G.

Q2: What installation precautions should I take with this aluminum piston kit?

When installing, ensure the cylinder bore is properly honed to the correct finish for optimal ring seating. Always lubricate the piston pin and rings with clean engine oil before assembly. Use a ring compressor tool to avoid damaging the ring grooves. Check piston-to-wall clearance per your engine manual (typically 0.10-0.15mm for aluminum pistons in cast iron blocks).

Q3: What maintenance intervals should I expect after installing this piston kit?

After installation, break in the engine for 50-100 hours under varying loads before full operation. Monitor oil consumption during the first 500 hours – normal consumption should stabilize after ring seating. Standard maintenance intervals for LR4105 engines with quality pistons typically range 4,000-6,000 hours before major overhaul, depending on operating conditions and maintenance practices.