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Technical Specifications: Caterpillar 7N-5449 Pressure Relief Spool
The Caterpillar 7N-5449 Pressure Relief Spool is an internal engine component situated within the engine oil pump mechanism. It dynamically regulates oil pressure throughout the engine block by redirecting excess fluid bypass when internal pressure parameters exceed safety thresholds, preventing seal blowouts and maintaining stable lubrication.
1. Core Dimensions & Weight
- Component Length: 131.00 mm (5.16 in)
- Cross-Sectional Width: Approximately 21.00 mm to 55.00 mm depending on the step-down ridge zones
- Average Weight: 0.21 kg to 0.45 kg (0.45 lbs to 1.00 lbs)
2. Material & Manufacturing Specs
- Material Grade: Premium case-hardened alloy steel engineered to resist scoring from high-velocity engine fluid streams.
- Structural Profile: Multidirectional concentric bypass groove structure machined to high-precision tolerances.
- Hardness Treatment: Surface-treated to maintain smooth sliding operations inside the pump bore, mitigating the risk of component sticking.
3. Equipment & Engine Compatibility
This oil pump relief valve spool is integrated into high-displacement Caterpillar diesel and heavy machinery platforms:
- Diesel Engine Series: CAT 3508, 3508B, 3512, 3512B, 3512C, 3516, 3516B, and high-output 3524B mining architectures.
- Primary Machine Systems: Standard equipment for CAT heavy earthmoving engine modules, marine propulsion pumps, and industrial generator setups.
4. Part Cross-References
- Alternative Part Numbers: 7N5449, 7N 5449.