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Cat® 107-7708 Crankshaft Main Bearing (96 mm OD) for 3116, 3126, and C7 Engines

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  2. Cat® 107-7708 Crankshaft Main Bearing (96 mm OD) for 3116, 3126, and C7 Engines
Cat® 107-7708 Crankshaft Main Bearing (96 mm OD) for 3116, 3126, and C7 Engines

High-durability Cat® 107-7708 Crankshaft Main Bearing (96 mm) for C7 and 3126 engines. Steel-backed aluminum construction ensures superior load capacity and thermal management for 325D and 320B excavators. Reduce engine friction and prevent crankshaft wear with OEM-standard parts. Request a quote today.

Technical Specifications 107‑7708 ‑ Main Bearing for CAT C7/3126/3116 Engines

107‑7708 Main Bearing — Precision Crankshaft Support Bearing

The 107‑7708 Main Bearing is a core internal engine component used to support the crankshaft. With an outer diameter of 96 mm, it provides a low‑friction running surface for crankshaft rotation under piston impact loads. It ensures accurate crankshaft alignment, stable oil‑film formation and efficient power transmission for Caterpillar medium‑duty diesel engines.

1. Technical Specifications

Technical ParameterSpecification Details
Part Number107‑7708 (1077708)
Product TypeCrankshaft Main Bearing / Main Shell
Outer Diameter96 mm
MaterialSteel‑Backed Aluminum‑Tin Alloy
Overall Dimensions (L × H)4.6 in (116.8 mm) × 2.3 in (58.4 mm)
Core FunctionCrankshaft Support & Rotation‑Friction Reduction

2. Machine Compatibility

This main bearing fits a wide range of CAT construction machinery with 3114, 3116, 3126 and C7 series engines:

  • Excavators: 320B, 322C, 324D, 325D, 329D, 325C L, M325D MH, 320‑A L

  • Engine Series: C7 Industrial / Petroleum / Truck Engine, 3126B Marine / Generator‑Set Engine, 3116, 3114

  • Wheel Loaders: 950H, 962H, 966F, 938G II, 950G, 928G

  • Motor Graders: 120H, 140M, 140K, 12M, 160K, 120K

  • Dozers: D5M, D5N, D6M, D6N

  • Road‑Building Equipment: PM‑102 Cold Planers, AP‑1055D Pavers, CS‑563 Compactors

  • Special‑Purpose Machines: 963C/953C Track Loaders, 561N Pipelayers, 535C Skidders

3. Key Features & Advantages

  • Composite Material Structure: Steel‑backed aluminum‑tin alloy combines high structural strength with good embeddability and heat dissipation performance.

  • Precision‑Controlled Oil‑Film Clearance: Strict dimensional tolerances ensure stable lubricating oil film, reducing crankshaft journal wear under heavy‑load conditions.

  • Strong Anti‑Fatigue Performance: Resists high‑frequency vibration and rotational impact loads, adapting to harsh industrial and marine working environments.

  • Energy‑Saving & Emission‑Reducing: Low‑friction surface minimizes internal power loss, improving fuel economy and reducing engine emissions.

Commercial Reference Information
Product: Crankshaft Main Bearing
Cross Part Number: 1077708
MOQ: 1 Engine Set
Warranty Period: 6‑12 Months

For bulk wholesale, technical consultation and crankshaft‑bearing component solutions:

Xuzhou Sinoswift Import & Export Co., Ltd.
Contact: +86 13701956981
Email: [email protected]

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