S&S Cycle Oil Pump Relief Valve Spring for 1936-1999 Harley-Davidson Big Twin

S&S Cycle Oil Pump Relief Valve Spring for 1936-1999 Harley-Davidson Big Twin

The oil pump relief valve spring controls the pressure at which excess oil is bypassed back to the supply side, and a weakened spring produces lower-than-specified relief pressure that allows oil to bypass before the engine has adequate lubrication at critical bearings. The S&S Cycle Oil Pump Relief Valve Spring maintains correct relief pressure in 1936-1999 Big Twin oil pumps.

Key Features

• Replacement oil pump relief valve spring for 1936-1999 Harley-Davidson Big Twin
• Maintains correct relief pressure to prevent premature bypass before adequate lubrication is achieved
• Sold individually – one required per pump
• Made in the USA by S&S Cycle

Technical Specifications

• Wire Diameter: .040 inch
• Free Length: 2.32 inches
• Application: Oil pump relief valve spring for 1936-1999 Harley-Davidson Big Twin
• Quantity: Sold individually – one required per pump
• Country of Origin: USA

Fitment Notes

• Fits 1936-1999 Harley-Davidson Big Twin oil pump relief valve positions
• One spring required per pump – verify your oil pump year range before ordering
• Replace during any oil pump rebuild or when oil pressure readings indicate premature bypass
• Review the Fitment tab for complete year and model breakdown