R714A J05e Con Rod Bearing

Product Overview

The R714A J05E Con Rod Bearing Set from Taiho is a precision-engineered connecting rod bearing set specifically designed for the J05E diesel engine found in Kobelco SK200-8, SK210LC-8, SK250-8, and SK260LC-8 excavators. Taiho is a leading manufacturer of engine bearings, recognized globally for producing OEM-quality components with exceptional durability and precision.

This connecting rod bearing set, also known as a conrod bearing set or rod bearing set, provides the critical bearing surfaces between the connecting rod and the crankshaft journal. These bearings allow the connecting rod to pivot freely as the crankshaft rotates while transmitting the immense forces of combustion with every power stroke. The R714A bearing set is designed for standard (STD) size applications and is engineered to meet or exceed original equipment specifications.

The Kobelco SK200-8, SK210LC-8, SK250-8, and SK260LC-8 are 20-26 ton class excavators powered by the Hino J05E engine, a reliable 4-cylinder diesel powerplant known for its durability. During a complete engine overhaul or bottom-end rebuild, replacing the connecting rod bearings is essential for restoring proper oil clearance and ensuring long-term engine reliability.

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Taiho Brand Overview

Taiho Kogyo Co., Ltd. is a globally respected manufacturer of engine bearings and precision components, serving as an OEM supplier to many of the world’s leading automotive and heavy equipment manufacturers. Taiho bearings are known for:

• Precision Tolerances: Manufactured to exacting dimensional standards for proper oil clearance

• Superior Material Formulations: Advanced bearing alloys designed for high-load diesel applications

• Durability: Engineered to withstand the extreme forces of modern diesel engines

• OEM Credentials: Supplied as original equipment to major engine manufacturers

When choosing replacement bearings for your J05E engine, Taiho provides OEM-quality reliability at competitive pricing.

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Key Features

• Taiho Brand Quality: Manufactured by Taiho Kogyo, a leading OEM-grade bearing manufacturer trusted worldwide.

• J05E Engine Specific Design: Precision-engineered specifically for the Hino J05E diesel engine found in Kobelco SK200-8, SK210LC-8, SK250-8, and SK260LC-8 excavators.

• Complete Bearing Set: Includes all connecting rod bearings required for a full J05E engine bottom-end rebuild (4 cylinders = 4 connecting rod bearing sets).

• Standard Size (STD): Designed for standard crankshaft journal dimensions (not undersized).

• Precision Tolerances: Machined to exact dimensional specifications for proper oil clearance, preventing both excessive play (causing rod knock) and insufficient clearance (causing bearing seizure).

• High-Grade Bearing Material: Constructed with premium bearing alloy featuring excellent fatigue resistance under high-load diesel engine conditions.

• Proper Oil Hole Alignment: Engineered with correct oil hole configurations to ensure proper lubrication flow from the connecting rod to the bearing surface.

• Cross-Reference Compatibility: Interchangeable with OEM part numbers including VH132601790A.

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Compatibility

This connecting rod bearing set is a direct replacement for the following Kobelco excavator models powered by the J05E engine:

8-Series Models

• Kobelco SK200-8

• Kobelco SK210LC-8

• Kobelco SK250-8

• Kobelco SK260LC-8

Engine Compatibility

• Hino J05E Diesel Engine

Cross Reference Part Numbers

Brand: Taiho
Also Known As: Conrod Bearing, Rod Bearing, Connecting Rod Shell Bearing, Connecting Rod Bearing Set

Please verify your engine model and current bearing part number before purchasing to ensure correct fitment.

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Connecting Rod Bearing Function

The connecting rod bearing is one of the hardest-working components inside any diesel engine:

Power Transmission

The bearing transfers the immense force of combustion from the piston and connecting rod to the crankshaft, converting linear piston motion into rotational power.

Friction Reduction

Provides a smooth, low-friction surface between the connecting rod and the crankshaft journal, allowing the engine to rotate freely under high loads.

Oil Film Retention

Precision-engineered surface geometry retains a thin film of engine oil that separates the bearing from the crankshaft, preventing metal-to-metal contact.

Crankshaft Protection

Serves as a sacrificial wear surface, protecting the expensive crankshaft from damage. When bearing wear occurs, the bearing fails first, saving the crankshaft.

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Signs Your Connecting Rod Bearings Need Replacement

The connecting rod bearings are subject to wear over thousands of operating hours. Replace your R714A connecting rod bearings if you observe:

1. Rod Knock Noise: A deep, rhythmic knocking sound from the engine that increases with RPM and becomes more pronounced under load. This is the classic symptom of worn connecting rod bearings.

2. Low Oil Pressure: Worn rod bearings increase internal clearances, causing a drop in oil pressure, especially at idle or when the engine is hot.

3. Metal Particles in Engine Oil: Bronze, silver, or copper-colored metal flakes in the engine oil indicate bearing material wear.

4. Engine Vibration: Excessive bearing clearance can cause imbalance and unusual engine vibration.

5. Loss of Power: Worn bearings can affect engine performance due to increased internal friction and reduced oil pressure.

6. During Engine Overhaul: When performing a complete engine rebuild or bottom-end overhaul, connecting rod bearings should always be replaced with new ones. Never reuse old bearings.

7. After Oil Starvation Event: If the engine has experienced low oil pressure or ran out of oil, connecting rod bearing replacement is mandatory.

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Benefits

Why choose our Taiho R714A J05E Con Rod Bearing Set for your Kobelco excavator?

1. Taiho OEM-Grade Quality: Taiho is a trusted bearing manufacturer with decades of experience supplying OEM-quality components to engine builders worldwide.

2. Prevents Catastrophic Engine Failure: A failed connecting rod bearing can cause the rod to break and punch through the engine block, destroying the engine completely. Quality bearings prevent this costly damage.

3. Eliminates Rod Knock: Worn bearings produce a distinctive knocking sound. New bearings eliminate this noise and restore smooth engine operation.

4. Restores Oil Pressure: New bearings restore proper crankshaft clearances, bringing oil pressure back to OEM specifications.

5. Protects the Crankshaft: The connecting rod bearing is a sacrificial component designed to wear before the crankshaft. Quality bearings protect your expensive crankshaft.

6. Extends Engine Life: Properly functioning rod bearings reduce internal friction and wear, allowing your J05E engine to run for thousands more hours.

7. Essential for Complete Overhaul: Any comprehensive J05E engine rebuild must include new connecting rod bearings for reliable long-term operation.

8. Cost-Effective Protection: Connecting rod bearings are an inexpensive part of an engine rebuild that protect the most expensive components.

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J05E Engine Connecting Rod Assembly

The Hino J05E engine is a 4-cylinder diesel engine. When installing connecting rod bearings, proper assembly procedures are critical:

Bearing Installation

Install the connecting rod bearing to suit the concave shape of the connecting rod cap. Align the match mark of the connecting rod cap with that of the connecting rod and fix it with a dowel pin.

Important Notes

• Do not change the combination between the connecting rod and the connecting rod cap

• Upper and lower bearing shells may have different specifications

• Ensure the bearing tab aligns with the notch in the connecting rod

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Measuring Connecting Rod Bearing Clearance

Proper bearing clearance is critical for J05E engine performance:

Plastigauge Measurement

1. Clean all bearing surfaces and crankshaft journals thoroughly

2. Cut plastigauge to the width of the crankshaft journal

3. Place plastigauge on the journal, parallel to the crankshaft axis, avoiding oil holes

4. Install the connecting rod cap and tighten bolts to specified torque

5. Do not rotate the crankshaft while plastigauge is installed

6. Remove the cap and measure the flattened plastigauge width against the provided scale

Acceptable Clearance

Refer to the J05E engine service manual for the specific acceptable clearance range. Standard clearance is typically between 0.020-0.050 mm for connecting rod bearings.

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Installation Tips

• Professional Installation Required: Connecting rod bearing replacement requires complete engine disassembly, precision measurement tools, and exact torque specifications. Professional installation by an experienced diesel mechanic is strongly recommended.

• Verify Bearing Orientation: Ensure bearings are installed with the correct orientation. Upper bearings (in the connecting rod) typically have oil holes; lower bearings (in the cap) typically do not.

• Inspect Crankshaft Journals: Thoroughly inspect all connecting rod journals on the crankshaft for scoring, taper, or out-of-round conditions. Damaged journals must be ground or the crankshaft replaced.

• Use Undersized Bearings if Needed: If the crankshaft has been ground, use appropriately undersized bearings. The R714A is standard size; order undersized bearings separately if required.

• Lubricate Before Assembly: Apply clean engine oil or assembly lube to the bearing surface and crankshaft journals before installation.

• Follow Torque Specifications: Use J05E engine service manual torque specifications for connecting rod cap bolts. Follow the specified sequence for tightening.

• Replace Bolts if Required: Connecting rod bolts are often torque-to-yield and must be replaced, not reused.

• Do Not Mix Components: Do not change the combination between the connecting rod and the connecting rod cap. Keep matched sets together.

• Verify Rotation: After torquing all connecting rod caps, verify the crankshaft rotates freely by hand with no binding.

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Why Choose Taiho Brand Bearings?

Taiho has established a reputation for excellence in engine bearing manufacturing, serving as an OEM supplier to major engine manufacturers. When rebuilding your J05E engine, choosing Taiho bearings provides:

• OEM-Equivalent Quality: Manufactured to the same exacting standards as original equipment

• Proven Durability: Taiho bearings are engineered for the high-load demands of diesel engines

• Precision Fit: Tight dimensional tolerances ensure proper oil clearance

• Global Trust: Used by engine rebuilders worldwide

Our R714A J05E Con Rod Bearing Set from Taiho is manufactured to strict quality standards with precise dimensional tolerances and premium bearing materials. Whether you are performing a complete engine overhaul, responding to rod knock or low oil pressure issues, or stocking critical spares for fleet maintenance, you can trust these bearings to deliver the precision and durability your J05E engine requires.

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Technical Specifications

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Order your R714A J05E Con Rod Bearing Set (Taiho Brand) today and ensure your Kobelco excavator’s J05E engine bottom end is rebuilt to OEM standards. In stock and ready for immediate worldwide shipping. Bulk pricing available for engine rebuild kits and fleet maintenance.