Daido Oversize 0.25mm Connecting Rod Bearing Set for Komatsu 4D95 Engine

Product Details

Product Overview

This Daido Oversize 0.25mm Connecting Rod Bearing set is a precision-engineered replacement component specifically designed for the Komatsu 4D95 diesel engine. As a critical part of the engine’s bottom end, these bearings ensure proper clearance and oil film thickness between the connecting rod and the crankshaft journal. The +0.25mm oversize specification is typically required when the crankshaft has been reground to the first undersize, restoring the correct bearing-to-journal fit.

Manufactured by Daido, a recognized name in the bearing industry, this set offers a reliable solution for engine rebuilds and overhauls. While commonly associated with Komatsu excavators and industrial machinery, the 4D95 engine platform is also found in various other heavy equipment applications. Please verify your specific engine model and crankshaft journal condition before purchase.

Key Features & Benefits

• Oversize Precision: Specifically machined to +0.25mm oversize, ensuring correct clearance for reground crankshaft journals during engine rebuilds.
• Daido Quality: Manufactured by a reputable Japanese brand known for high-quality engine bearings, providing confidence in material and dimensional accuracy.
• Direct Fit Application: Engineered for the Komatsu 4D95 diesel engine, a common platform in excavators, bulldozers, and industrial equipment.
• 100% New Condition: Guaranteed new, not remanufactured, ensuring no wear history and full service life potential.
• Complete Set: Supplied as a full set of connecting rod bearings, simplifying procurement for engine rebuilds.
• Standard Packaging: Comes in secure Daido packaging to prevent damage during transit and storage.

Technical Specifications

OEM Cross-Reference

This Daido oversize bearing set is designed to meet or exceed OEM specifications. While no direct OEM number was provided for this specific oversize variant, it is the service replacement for standard OEM connecting rod bearings used in the Komatsu 4D95 engine. For standard size bearings, common OEM numbers may include Komatsu part numbers. We recommend cross-referencing your original part number or consulting your engine service manual to confirm the correct oversize specification.

Compatibility

This connecting rod bearing set is specifically designed for use in the Komatsu 4D95 diesel engine. This engine platform is commonly used for:

• Komatsu PC120-5, PC120-6, and PC130-7 excavators
• Komatsu D31, D37, and D38 bulldozers
• Various other Komatsu industrial and agricultural machinery utilizing the 4D95 engine

Note: Always verify your engine model and crankshaft journal size to ensure the +0.25mm oversize is correct for your application.

Global Supply & Distribution

We offer worldwide shipping for this Daido connecting rod bearing set, ensuring fast and reliable delivery to major industrial hubs and ports globally. Our logistics network covers:

• North America: Rapid delivery to the United States, Canada, and Mexico via air and sea freight.
• Europe: Efficient distribution to Germany, the United Kingdom, France, the Netherlands, and other key markets.
• Asia-Pacific: Fast shipping to Japan, South Korea, Australia, Southeast Asia, and the Middle East.
• South America & Africa: Reliable service to major ports and industrial centers.

With our export experience, we ensure proper customs documentation and international trade compliance for smooth cross-border transactions.

Quality Assurance

This Daido connecting rod bearing set is manufactured to high industry standards for dimensional accuracy and material quality. Each bearing is produced from specialized steel-backed copper-lead or aluminum alloy, designed to withstand the high loads and temperatures within a diesel engine. While no independent machinery test report is available for this specific listing, Daido’s reputation in the bearing industry provides a baseline of quality assurance. The product is backed by a 3-month warranty against manufacturing defects, with after-warranty online support available.

FAQ

Q: How do I know if I need a 0.25mm oversize connecting rod bearing?
A: This bearing is used when the crankshaft connecting rod journal has been reground to 0.25mm undersize (typically the first standard undersize). You must measure the reground journal diameter and compare it to the original factory specification. If the journal is 0.25mm smaller than standard, this +0.25mm bearing will restore the proper oil clearance. Always consult your engine service manual for exact specifications.

Q: Is this a direct replacement for the original Komatsu bearings?
A: Yes, this is a direct replacement in terms of outer diameter, width, and locating tab design. However, the inner diameter is 0.25mm smaller than standard to match a reground crankshaft. Ensure your crankshaft has been machined to the corresponding undersize before installation.

Q: What should I check during installation?
A: Before installation, verify the bearing shells are clean and free of debris. Check the bearing crush height (the amount the bearing stands proud of the rod bore) to ensure proper seating. Always use assembly lube on the bearing surface and torque the connecting rod bolts to the manufacturer’s specifications using a calibrated torque wrench. After assembly, verify crankshaft rotation is smooth and free of binding.