Technical Specifications: Caterpillar 138-8506 Piston PinThe
Caterpillar 138-8506 Piston Pin (Wrist Pin / Gudgeon Pin) is a critical heavy-duty engine component engineered to connect the piston assembly to the connecting rod. It efficiently transfers combustion loads down to the crankshaft assembly under high-pressure conditions.
1. Core Dimensions & Weight
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Nominal Outer Diameter: 70.00 mm (2.75 in)
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Exact Outer Diameter: 69.965 mm
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Inner Diameter: 35.00 mm
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Pin Length: 137.70 mm
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Net Weight: 3.18 kg (approx. 7.00 lbs)
2. Material & Manufacturing Specs
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Base Material: Premium-grade heavy-duty alloy steel
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Heat Treatment: Case-hardened wear surface for optimal fatigue resistance
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Machining Process: CNC precision-ground finish to minimize friction
3. Equipment & Engine Compatibility
This part is explicitly designed for the Caterpillar 3500 and G3500 series engine platforms. It is utilized across multiple machine configurations:
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Industrial & Marine Engines: CAT 3508, 3512, 3516
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Gas Engines: G3508, G3512, G3516, G3520 (including B, C, E, J series variants)
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Generator Sets: SR4, SR4B, SR4BHV
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Heavy Earthmoving Equipment: Caterpillar D11N Track-Type Tractors, 777B/785/789 Mining Trucks
