Caterpillar Engine Cylinder Liner 5i7523 34307-00500 for S4k S6k C6.4 3066 3064 320C 320D 320B

Product Details

Product Overview

This high-quality cylinder liner is a critical replacement component for a wide range of Caterpillar diesel engines used in heavy machinery. Designed to restore compression and oil control, this part is engineered to match OEM specifications for reliable performance in demanding environments. The part numbers 5i7523 and 34307-00500 are directly referenced for fitment identification.

Specifically manufactured for engine models including the S4K, S6K, C6.4, 3066, and 3064, this liner is commonly used in popular excavator models such as the 320C, 320D, and 320B. It is a direct replacement part that ensures a precise fit within the engine block, providing the necessary durability for long service intervals in construction, mining, and agricultural applications.

Key Features & Benefits

• OEM Specification Compliance: Manufactured to meet or exceed original equipment manufacturer standards for dimensions, material hardness, and surface finish, ensuring a perfect seal and long wear life.
• High-Wear Resistance: Constructed from premium-grade cast iron with a hardened bore surface to resist scuffing, scoring, and corrosion from fuel combustion byproducts.
• Precision Engineering: Each liner undergoes rigorous dimensional inspection to guarantee correct wall thickness and flange height, preventing installation issues and ensuring proper piston ring seal.
• Direct Fit Replacement: Designed as a drop-in replacement for the specific Caterpillar models listed, saving time and labor costs during engine overhaul or repair.
• Improved Engine Performance: Restores cylinder compression, reduces oil consumption, and enhances overall engine power output and fuel efficiency.
• Rigid Quality Control: Every unit is individually inspected for cracks, porosity, and dimensional accuracy before packaging to ensure zero-defect delivery.

Technical Specifications

OEM Cross-Reference

This cylinder liner directly replaces the following original equipment manufacturer (OEM) part numbers. Please verify your existing part number against this list for compatibility.

• Caterpillar OEM: 5i7523
• Komatsu OEM: 34307-00500

Note: The 34307-00500 number is commonly associated with Komatsu engines that share design heritage with Caterpillar models in this series. Always confirm your engine serial number for correct fitment.

Compatibility

This cylinder liner is commonly used for the following engine models and machinery applications. Fitment is inferred based on standard engine configurations and should be verified against your specific equipment.

Engine Models: S4K, S6K, C6.4, 3066, 3064

Common Applications:

• Excavators: Caterpillar 320C, 320D, 320B
• Forklifts: Various models using the S4K/S6K engines
• Trucks & Loaders: Medium-duty trucks and wheel loaders equipped with these engines
• Bulldozers & Buses: Other heavy equipment utilizing the 3066/3064 series engines

Global Supply & Distribution

We maintain a robust global supply chain to ensure fast and reliable delivery to B2B buyers worldwide. Our distribution network covers all major industrial markets, including:

• North America: Expedited shipping to ports like Los Angeles, Houston, and New York, with inland delivery to industrial hubs.
• Europe: Regular shipments to Rotterdam, Hamburg, and Antwerp for distribution across the EU.
• Asia-Pacific: Direct logistics to Singapore, Dubai (Jebel Ali), and major Chinese ports for regional distribution.
• Middle East & Africa: Efficient service to Jeddah, Durban, and Mombasa for mining and construction sectors.

We offer flexible shipping options including sea freight (FCL/LCL), air freight, and express courier services. All exports comply with international trade regulations, and we provide full documentation including commercial invoices, packing lists, and certificates of origin.

Quality Assurance

Every cylinder liner is manufactured under strict quality control procedures to ensure reliability and longevity. Our quality assurance program includes:

• Manufacturing Standards: Produced in ISO 9001 certified facilities with advanced CNC machining and casting technology.
• Testing Procedures: 100% dimensional inspection using CMM (Coordinate Measuring Machine) equipment. Hardness testing and surface finish analysis are performed on every batch.
• Warranty: 6-month warranty against manufacturing defects from the date of purchase. This covers material flaws and workmanship issues under normal operating conditions.
• Video Inspection: Outgoing inspection videos are provided upon request to verify product condition before shipment.
• Machinery Test Report: A test report is available to confirm that the liners meet performance specifications.

FAQ

Q1: How do I confirm that this cylinder liner (5i7523/34307-00500) will fit my Caterpillar 320D engine?
A: First, locate your engine serial number (ESN) plate on the valve cover or engine block. Cross-reference the ESN with the engine models listed (S4K, S6K, C6.4, 3066, 3064). For the 320D, which often uses the C6.4 engine, this liner is a standard replacement. We also recommend measuring your old liner’s bore diameter, flange height, and overall length to compare with OEM specs. If you are unsure, contact our technical support with your engine serial number for personalized verification.

Q2: What is the recommended installation procedure for these cylinder liners?
A: Proper installation is critical for liner longevity. First, thoroughly clean the cylinder block bore and ensure it is free of debris and old sealant. Apply a thin, even coat of approved sealant (such as Loctite 620 or equivalent) to the outer diameter of the liner. Using a suitable installation tool, press the liner into the block evenly to avoid distortion. Ensure the liner flange sits flush with the block deck surface. After installation, measure the liner protrusion (typically 0.05-0.15mm) and check for roundness. Allow the sealant to cure per manufacturer instructions before reassembling the piston and head.

Q3: What maintenance practices can extend the life of these replacement cylinder liners?
A: To maximize service life, maintain proper engine operating temperatures and avoid overheating. Use high-quality engine oil with the correct viscosity (typically 15W-40 for these engines) and change it at recommended intervals. Ensure the air filtration system is functioning correctly to prevent abrasive dust from entering the cylinders. During overhauls, always replace piston rings and consider reconditioning the cylinder head. Regularly check coolant levels and use a properly formulated coolant to prevent cavitation erosion on the liner’s outer wall.