The Caterpillar 2W-5479 Oil Pump Shaft is a critical, heavy-duty internal component within the engine lubricating oil pump assembly. Driven by the front timing gear train, this precision shaft transmits mechanical rotational power to the pump's internal gears or impeller, driving continuous fluid flow to supply engine oil to all major bearings, pistons, and valvetrain assemblies.
1. Core Dimensions & Weight
- Overall Component Length: 203.20 mm (8.00 in)
- Component Width / Diameter: 81.30 mm (3.20 in)
- Component Height: 81.30 mm (3.20 in)
- Outer Diameter Fitting: 71.050 mm
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Net Weight: 2.72 kg (6.00 lbs)
2. Material & Manufacturing Specs
- Material Grade: Premium case-hardened alloy steel matrix optimized for continuous high-load rotational shear stress.
- Hardness Treatment: Micro-ground, induction-hardened journal wear surfaces to minimize internal friction and eliminate shaft runout under high pressures.
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Precision Alignment: Engineered to strict OEM technical tolerances to prevent backlash and early timing gear wear.
3. Equipment & Engine Compatibility
This heavy-duty oil pump shaft is a vital element for Caterpillar 3500 and G3500 large-bore engine platforms:
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Diesel Engine Series: CAT 3508, 3508B, 3512, 3512B, 3512C, 3512E, 3516, 3516B (including high-displacement mining and marine propulsion variants).
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Gas Engine Series: G3508, G3512, G3512B, G3512E, G3512H, G3512J, G3516, G3516B, G3516C, G3516E, G3516H.
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Ultra-Class Mining Machinery: Caterpillar D11N Track-Type Tractors, 994 Wheel Loaders, and 776B, 777B/D, 784B/C, 785/B/C/D/G, 789/B, 793/B, and 797/B Off-Highway Mining Trucks.
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Marine & Power Generation: PM3508, PM3512, PM3516 power modules, and SR4, SR4B, SR4BHV, SR5 alternator engine generator sets.
4. Part Cross-References
- Alternative Part Numbers: 2W5479, 2W 5479
- Direct System Alternative: 2W-6618
