The Caterpillar 2S-2760 Compression Spring (Oil Pump Pressure Relief Valve / Plunger Spring) is a heavy-duty, precision-wound engine component. It provides calibrated mechanical resistance inside the engine oil pump relief valve mechanism, controlling oil decompression parameters to maintain stable fluid lubrication across the main block galleries.
1. Core Dimensions & Weight
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Spring Type: Compression
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Free Length: 152.91 mm (6.02 in)
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Assembled Length: 117.14 mm (4.61 in)
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Solid Length: 99.30 mm (3.91 in)
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Outside Diameter: 25.40 mm (1.00 in)
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Wire Diameter: 4.32 mm (0.17 in)
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Total Coils: 23
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Net Weight: 0.14 kg (0.31 lbs)
2. Material & Mechanical Ratings
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Material Grade: High-tensile premium spring steel matrix.
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Surface Treatment: Phosphate and oil coating (phos/oil) to maximize wear defense and combat chemical oxidation in hot lubricant basins.
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Spring Rate: 14.09 N/mm
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Load at Assembled Length: 499 N (112.18 lbs)
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Regulatory Compliance: RoHS compliant.
3. Equipment & Engine Compatibility
This high-stress relief spring handles fluid pressure management within several flagship Caterpillar heavy-duty diesel and gas platforms:
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On-Highway & Industrial Engines: CAT 3406, 3406B, 3406C, 3406E, C15, C15 ACERT, C16, and C18 series.
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Wide-Bore Engine Platforms: Integrated within specific lubrication oil pump valve groupings of the CAT 3500 series.
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Heavy Construction Fleets: Deployed across large earthmoving systems, heavy mining trucks, and stationary power generation groups requiring stable high-viscosity fluid containment.
4. Part Cross-References
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Alternative/Interchangeable Part Numbers: 2S2760, 2S 2760, 7W-2358, 7W2358
- Manufacturer Crosses: PAI 341351, CAP341351, Interstate-McBee M-2S2760
