Main Bearing 8-97372077-0 Crankshaft Bearing 8973720770 for 4HK1 6HK1 6HH1 Excavator Engine

Product Details

Product Overview

This premium main bearing, identified by the OEM part number 8-97372077-0 (also referenced as 8973720770), is a critical crankshaft bearing component designed for high-performance diesel engines. Manufactured to exacting OEM specifications, this bearing is commonly used in the main bearing saddle of the engine block to support the crankshaft, ensuring smooth rotation and minimal friction under heavy loads.

Specifically engineered for the Isuzu 4HK1, 6HK1, and 6HH1 engine series, this part is a direct replacement for the original equipment. It is ideally suited for heavy-duty applications, including excavators and other construction machinery where engine reliability and longevity are paramount. As a genuine component, it guarantees precise fitment and consistent performance.

Key Features & Benefits

• OEM Exact Fit: Direct replacement for part number 8-97372077-0 / 8973720770, ensuring a perfect match with no modifications required for 4HK1 and 6HK1 engine blocks.
• Superior Durability: Manufactured from high-grade aluminum alloy or copper-lead material, providing exceptional wear resistance and load-bearing capacity for extended service life.
• Precision Engineering: Machined to tight tolerances for correct oil clearance, reducing friction and preventing premature crankshaft or bearing failure.
• Enhanced Oil Film Retention: Designed with optimized grooves and chamfers to maintain a stable oil film, critical for high-RPM and high-torque engine operation in excavators.
• Long-Lasting Performance: Classified as “long-lasting parts,” this main bearing helps reduce maintenance intervals and downtime in demanding work environments.
• Genuine Condition: Sourced as a genuine component, providing peace of mind regarding material quality and manufacturing standards.

Technical Specifications

OEM Cross-Reference

This main bearing is a direct cross-reference for the following OEM numbers. Verify your engine’s specific part number to ensure compatibility:

• Primary OEM: 8-97372077-0
• Alternate Reference: 8973720770
• Compatible Series: Isuzu 4HK1, 6HK1, 6HH1 Main Bearing Set

Note: Always compare the physical dimensions (width, thickness, and inside diameter) of your old bearing with this part to confirm fitment, as engine block variations may exist.

Compatibility

This main bearing is commonly used for the following engine applications. Please confirm your specific engine model before purchasing:

• Engine Models: Isuzu 4HK1, 6HK1, 6HH1
• Common Applications: Excavators (e.g., Hitachi ZX series, Sumitomo SH series), Wheel Loaders, and other heavy construction equipment utilizing these Isuzu powerplants.
• Vehicle Types: Industrial diesel engines found in off-highway machinery.

Global Supply & Distribution

We offer worldwide shipping and maintain a robust supply chain to serve international B2B buyers. Our logistics network ensures fast and reliable delivery to major industrial hubs and ports across the globe.

• North America: Fast delivery to the US, Canada, and Mexico via air and sea freight.
• Europe: Efficient distribution to EU countries, including Germany, the UK, France, and the Netherlands.
• Asia-Pacific: Direct shipping to Japan, South Korea, Australia, and Southeast Asian markets (Thailand, Indonesia).
• Middle East & Africa: Reliable service to UAE, Saudi Arabia, South Africa, and other key markets.
• Export Compliance: All shipments comply with international trade regulations, with professional documentation provided.

Quality Assurance

We prioritize quality to ensure your engine rebuild is successful. This main bearing is sourced from reputable Japanese manufacturing channels and is guaranteed to meet OEM specifications.

• Manufacturing Standard: OEM specification with rigorous dimensional and material testing.
• Condition: Genuine, new-old-stock or high-quality aftermarket (verified as OEM equivalent).
• Warranty: 3-month warranty against manufacturing defects.
• After Warranty Service: Video technical support is available to assist with installation queries or troubleshooting.
• Testing: Each batch undergoes hardness and thickness checks to ensure consistent quality.

FAQ

Q1: Is this main bearing a direct fit for my 4HK1 engine in my Hitachi ZX200 excavator?
A: Yes, part number 8-97372077-0 is the standard main bearing for the Isuzu 4HK1 engine, which is commonly used in Hitachi ZX200 and similar excavator models. However, we recommend checking the engine serial number and comparing the old bearing’s width (typically 27-30mm for main bearings on this engine) to ensure it matches your specific block configuration.

Q2: How do I install this main bearing correctly without causing damage?
A: Installation requires careful attention. First, clean the bearing saddle and cap thoroughly. Lubricate the bearing surface with clean engine oil before placement. Use a torque wrench to tighten the main cap bolts to the manufacturer’s specification (typically 90-110 Nm for 4HK1 engines, but verify your service manual). Never hammer the bearing into place; it should press in smoothly. After installation, rotate the crankshaft by hand to check for binding.

Q3: What is the typical lifespan of this main bearing in an excavator?
A: Under normal operating conditions with proper lubrication and oil change intervals, this genuine main bearing can last for several thousand hours of operation. For excavators, lifespan is heavily dependent on load, oil quality, and maintenance schedules. Regular oil analysis and monitoring for bearing material in the oil filter can help predict wear. We recommend replacing main bearings as a set during a full engine overhaul for balanced performance.