Crankshaft Main Bearings ISUZU 4JJ1 / 4JG1 / 4JB1
High-quality main bearing set with part number 8973879660. Designed for the proven, 4-cylinder ISUZU engines from the 4JJ1, 4JG1, and 4JB1 series, commonly used in construction machinery (including Hitachi, Case, JCB). These bearings act as the key plain bearing for the crankshaft embedded in the engine block. They ensure minimum friction, optimal maintenance of oil pressure, and smooth, trouble-free operation of the crank system.
Product Features:
- High load capacity: Made of advanced, multi-layer bearing materials, providing excellent resistance to seizure and the ability to carry extreme mechanical loads.
- Perfect fit: Precise dimensions guarantee the maintenance of an optimal oil film (lubrication clearance) between the main journals of the shaft and the engine block.
- Wear resistance: The outer sliding coating exhibits high tolerance to contaminants in the engine oil and varying operating temperatures.
Specification and Application:
| ISUZU Part Number |
8973879660, 8-97387-966-0 |
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| Part Type |
Main Bearings (Size: Standard STD) |
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| Engine |
ISUZU 4JJ1 (3.0L) / 4JJ1 / 4JB1 / 4JG1 / 4JG2 / 4JH1 |
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| Application (Excavators) |
Hitachi Incl. models ZX70, ZX85, ZX130, ZX135, ZX160
Case Selected midi and heavy-class machines with J-series engines |
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Technical Tip: When replacing the main bearings, absolute cleanliness is essential. Before installation, it is absolutely necessary to blow out all oil channels in the engine block and crankshaft with compressed air. The sliding surfaces of the new bearings should be generously coated with a special assembly lube to prevent dry friction during the first engine start. Always check the dimensions of the shaft journals with a micrometer to ensure they do not require grinding.
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