Product Overview

The 6162-33-3041 is officially designated as a connecting rod bearing metal assembly (METAL ASS'Y), an original service part engineered for Komatsu heavy-duty diesel engine platforms. It is not a native Caterpillar (CAT) OEM part number, but is widely distributed in the aftermarket as a compatible replacement bearing for large-displacement heavy-duty diesel powertrains, including select CAT industrial engine applications with equivalent crankshaft journal dimensions.iLgR
As a split-type plain bearing set installed between the connecting rod big end and the crankshaft connecting rod journal, its core function is to establish stable hydrodynamic lubrication, bear cyclic combustion impact loads, and reduce rotational friction. This component is critical for ensuring reliable long-term operation of heavy diesel engines in mining, construction, marine propulsion and stationary power generation scenarios.

Core Technical Specifications

Parameter	Specification
Official Part Number	6162-33-3041 (hyphen-free format: 6162333041)
Component Type	Connecting rod bearing assembly (upper + lower precision bearing shells)
Primary OEM Fit Engine	Komatsu SAA6D170 / 6D170 series 6-cylinder heavy-duty diesel engines
Size Grade	Standard (STD) bore size; oversize variants available for aftermarket overhaul use
Base Material	High-strength copper-lead alloy with anti-wear tin-aluminum surface overlay
Surface Treatment	Precision honed working surface, corrosion-resistant protective coating
Package Configuration	1 set per cylinder (2 half-shells); 6 full sets required for one 6-cylinder engine
Mounting Position	Connecting rod big end, mating with crankshaft connecting rod journal

Key Features & Performance Advantages

1. Precision Load Bearing & Friction Reduction

Machined to micron-level dimensional tolerances, the bearing set maintains a strictly controlled oil clearance between the connecting rod and crankshaft journal. It forms a continuous hydrodynamic oil film during engine operation, effectively eliminating direct metal-to-metal contact, absorbing cyclic combustion impact loads, and extending the service life of both the crankshaft and connecting rod assembly.

2. Heavy-Duty Wear & Fatigue Resistance

Constructed from premium copper-lead bearing alloy with a hardened wear overlay, the assembly delivers exceptional resistance to abrasive wear, fatigue cracking and adhesive scuffing under sustained high-torque, high-temperature operating conditions. It is fully compatible with modern ultra-low sulfur diesel (ULSD) fuels and standard heavy-duty engine oils, resisting corrosion from fuel dilution and oil degradation over long service intervals.

3. Drop-In Fit & Cost-Effective Servicing

The split-shell design matches original equipment mounting dimensions perfectly, requiring no secondary machining or modification during installation. As a standard service replacement part for engine overhauls, it allows targeted replacement of worn bearings without full disassembly of the crankshaft assembly, significantly reducing maintenance downtime and total repair costs for fleet operators.

4. Uniform Cylinder-to-Cylinder Performance

Each bearing set is manufactured to consistent tolerance grades, ensuring identical oil clearance and load-bearing performance across all engine cylinders. This eliminates uneven wear patterns, reduces engine vibration, and maintains balanced power output throughout the entire engine service life.

Compatibility

Primary Engine Platforms

• Genuine OEM fit: Komatsu SAA6D170E, SAA6D170, 6D170 series 6-cylinder heavy-duty diesel engines
• Aftermarket cross-compatible: Select large-displacement Caterpillar 3500-series equivalent industrial engines (note: not an official CAT OEM part; verify crankshaft journal dimensions before installation)

Applicable Equipment

This bearing assembly is deployed in large-tonnage heavy machinery powered by the above engine platforms, including:

• Large hydraulic excavators (Komatsu PC700, PC750, PC800 series and equivalent CAT mining excavators)
• Off-highway mining dump trucks and articulated haulers
• Heavy-duty wheel loaders and bulldozers for mining and quarry operations
• Stationary industrial generator sets and marine main/auxiliary propulsion engines

Cross Reference Part Numbers

• Standard hyphen-free format: 6162333041
• Aftermarket equivalent codes: 6162-33-3041-MET, CRB-6D170-STD
• Related tolerance grade variants: 6162-33-3040 (0.25mm oversize), 6162-33-3042 (0.50mm oversize)

Installation & Maintenance Recommendations

1. Always replace all connecting rod bearings as a complete matched set during engine overhaul to ensure uniform clearance and wear performance across all cylinders.
2. Inspect crankshaft journal wear, roundness and taper before installation; replace or regrind the crankshaft if it exceeds service limits, and select corresponding oversize bearings to maintain proper oil clearance.
3. Lubricate all bearing working surfaces thoroughly with clean, specified-grade engine oil prior to assembly, and tighten connecting rod bolts strictly to official torque specifications to avoid bearing deformation or seizure.
4. Adhere to scheduled oil and filter change intervals, and use high-quality heavy-duty diesel engine oil to reduce abrasive contamination and slow bearing wear progression.
5. Monitor engine oil pressure and abnormal knocking noise during routine operation; sudden oil pressure drop or metallic knocking from the lower engine block are typical early symptoms of bearing wear failure.

Warranty Information

• Genuine Komatsu OEM bearings: 12-month unlimited service hour warranty against material and manufacturing defects, supported by Komatsu global parts network.
• Premium aftermarket replacement bearings: typically backed by a 6-month or 1000 operating hour limited warranty, subject to individual supplier terms.