Connecting Rod Bearing – Fits Yanmar 3TNV84/3TNV88/3JH3 Series & Komatsu 3D84E/S3D84E Engines (Replaces 129150-23601)
Connecting Rod Bearing – Fits Yanmar 3TNV84/3TNV88/3JH3 Series & Komatsu 3D84E/S3D84E Engines (Replaces 129150-23601) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Connecting Rod Bearing – Fits Yanmar 3TNV84/3TNV88/3JH3 Series &...
Product Details
This aftermarket Connecting Rod Bearing – Fits Yanmar 3TNV84/3TNV88/3JH3 Series & Komatsu 3D84E/S3D84E Engines is engineered to restore performance in a wide range of industrial and marine diesel engines. It is a direct-fit replacement compatible with Yanmar 3TNV84, 3TNV88, 3JH3, and 4TNV88 series engines, as well as Komatsu 3D84E, 3D88E, S3D84E, 4D84E, and 4D88E series engines found in mini excavators, skid steers, and wheel loaders.
This part serves as a direct replacement for Yanmar part numbers 129150-23601, YM129150-23601, 129150-23611, and YM129150-23611, ensuring proper fit and function.
- Installation Location: Mounts within the engine block on the connecting rod.
- Engine Type: Designed exclusively for diesel fuel applications.
- Kit Contents: Sold as a complete set of pairs, sufficient for a 3-cylinder engine.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yanmar | 129150-23601 | Original Equipment Manufacturer Number |
| Yanmar | YM129150-23601 | Alternative Part Number |
| Yanmar | 129150-23611 | Alternative Part Number |
| Yanmar | YM129150-23611 | Alternative Part Number |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This bearing set is confirmed to fit a variety of Yanmar industrial and marine diesel engines, including the popular 3TNV and 3JH series.
It is also widely used in Komatsu equipment that utilizes Yanmar-based engines, such as mini excavators, skid steers, wheel loaders, and vibratory rollers.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Yanmar | 3TNV84-BGKL | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-BGMG | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-BKSA2 | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-BMCU | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-BMNK | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-BXNK | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-DUW | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-DZP01/02/03 | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-GDG | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-GGE | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-GKL | 4-Stroke | 129150-23601 | |
| Yanmar | 3TNV84-K5FD | 4-Stroke | 129150-23601 | |
| Yanmar | 3JH3 | 4-Stroke | 129150-23601 | Marine diesel |
| Yanmar | 3JH3CE | 4-Stroke | 129150-23601 | Marine diesel |
| Yanmar | 3JH3E | 4-Stroke | 129150-23601 | Marine diesel |
| Yanmar | 3JH3-DT | 4-Stroke | 129150-23601 | Marine diesel |
| Yanmar | 4JH4-HTE1 | 4-Stroke | 129150-23601 | Marine diesel |
| Komatsu | 3D84E-5X-AB | 4-Stroke | 129150-23601 | |
| Komatsu | 3D84E-5N-BA | 4-Stroke | 129150-23601 | |
| Komatsu | 3D84E-5Q-QB | 4-Stroke | 129150-23601 | |
| Komatsu | S3D84E-5X-AC | 4-Stroke | 129150-23601 | |
| Komatsu | PC30MR-2 | 4-Stroke | 129150-23601 | Mini Excavator |
| Komatsu | PC30MR-2-A/B/C/D | 4-Stroke | 129150-23601 | Mini Excavator |
| Komatsu | SK510-5 | 4-Stroke | 129150-23601 | Skid Steer |
| Komatsu | JV25CW-3 | 4-Stroke | 129150-23601 | Vibratory Roller |
| Komatsu | JV25DW-3 | 4-Stroke | 129150-23601 | Vibratory Roller |
| Komatsu | WA30-5 | 4-Stroke | 129150-23601 | Wheel Loader |
| Komatsu | WA40-3 | 4-Stroke | 129150-23601 | Wheel Loader |
| Komatsu | WA40-3-CB | 4-Stroke | 129150-23601 | Wheel Loader |
| Komatsu | WA40-3-CN | 4-Stroke | 129150-23601 | Wheel Loader |
| Komatsu | WA50-3 | 4-Stroke | 129150-23601 | Wheel Loader |
| Komatsu | WA50-3CB | 4-Stroke | 129150-23601 | Wheel Loader |
| Komatsu | WA50-3-CN | 4-Stroke | 129150-23601 | Wheel Loader |
Technical Specs
- Product Type
- Connecting Rod Bearing (Crank Pin Bearing)
- Installation
- Engine Block - Connecting Rod
- Fuel Type
- Diesel
- Housing Material
- Steel with Bearing Surface
- Size
- Standard Size (STD)
- Package Contents
- Sold as a set of pairs (3 pairs/1 set for 3-cylinder engines)
- Product Dimensions
- 2.0" H x 5.5" W x 5.5" L
- Shipping Dimensions
- 2.0" H x 5.5" W x 5.5" L
What’s in the Box
- 1 x Set of Connecting Rod Bearings (3 pairs, for 3-cylinder engines) Replaces 129150-23601/129150-23611
Installation Notes
- Disconnect the battery and drain the engine oil and coolant completely.
- Remove the oil pan to access the bottom end of the engine.
- Identify and mark the connecting rod caps and their orientation before disassembly.
- Carefully unbolt and remove the connecting rod cap for the cylinder you are servicing.
- Push the piston slightly up the bore to remove the old bearing half from the connecting rod.
- Remove the other bearing half from the connecting rod cap.
- Thoroughly clean the connecting rod and cap surfaces, ensuring they are free of oil, debris, and burrs.
- Apply assembly lube to the new bearing surfaces before installation.
- Place the new bearing halves into the rod and cap, ensuring the locating tangs are correctly seated.
- Reinstall the connecting rod cap, ensuring it is in the correct orientation, and torque the bolts to the manufacturer's specifications.
- Repeat the process for the remaining cylinders. Refill engine with oil and coolant before starting.
Troubleshooting & FAQ
What are the signs of a failing connecting rod bearing?
Common symptoms include a persistent, rhythmic knocking or tapping sound from the engine (rod knock) that increases with RPM, low oil pressure, and the presence of metallic shavings in the engine oil during an oil change.
Is this a single bearing or a complete engine set?
This is a complete set containing three pairs of bearing shells, sufficient for servicing all three cylinders in a compatible 3-cylinder engine like the Yanmar 3TNV84 or Komatsu 3D84E.
What is the difference between part numbers 129150-23601 and 129150-23611?
These numbers are often used interchangeably and represent the same standard size connecting rod bearing. The latter may be a superseded or alternative part number. This kit is a direct replacement for both.
Are these standard size (STD) bearings?
Yes, these are standard size bearings for use with a crankshaft that has not been machined or ground undersize. Always measure your crankshaft journals to confirm the required bearing size before ordering.
Do I need special tools for this job?
Yes, installation requires specific tools, including a torque wrench to tighten bolts to precise specifications, feeler gauges or Plastigauge to check oil clearance, and a piston ring compressor. Professional installation is highly recommended.
Will this fit a 4-cylinder 4TNV88 engine?
While the bearings are the same type, this kit contains parts for a 3-cylinder engine. For a 4-cylinder engine like the 4TNV88, you would need to purchase an additional pair of bearings or a kit specifically for 4-cylinder models.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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