WESPC Valve Spring 3174A016 for Perkins 1103/1104 Diesel Engines - 48mm Length, 29mm Diameter

This outer valve spring (3174A016) is designed for both inlet and exhaust valves on 3- and 4-cylinder Perkins 1103/1104 diesel engines (3.3-4.4L) and Caterpillar 3054C industrial engines. Common applications include:

• JCB 3CX/4CX back-hoe loaders
• Case Maxxum tractors
• 45 kVA "Vista A" generator sets
• MF 1700-series farm tractors

The spring maintains precise valve motion up to 3,000 min⁻¹ while meeting EU Stage IIIA / EPA Tier 4-final emission standards.

Manufactured from chrome-vanadium spring steel (50CrV4) that undergoes oil-quenching and tempering to achieve 47 HRC hardness. Advanced shot-peening at 0.25 mm A-intensity extends fatigue life to 1 × 10⁷ cycles.

• 50CrV4 alloy composition: 0.5% C, 1% Cr, 0.15% V
• Tensile strength: 1,600 MPa with 8% elongation
• Heat resistance: Maintains performance at exhaust temperatures up to 700°C
• Surface treatment: 400 MPa compressive stress from shot-peening delays fatigue cracks
• Service life: Up to 12,000 hours under normal operating conditions
• Phosphate coating: Retains oil during cold starts, reducing initial scuffing by 20%
• Precision ends: Closed-and-ground ends maintain squareness within 0.5°, preventing valve head tilt and seal wear

PERKINS 3174A016, T417883, 4360519, KMP 3174A016, FPS VS3174A016, ITM VOE3174A016, FAI VS3174A016, AJUSA 8103174A016, GLYCO VS-Per 1103/1104, MAHLE VS-3174A016, AE 3174A016, CLEVITE VS-3174A016, TOPLINE 3174A016, VMC 3174A016, MARINE D'USTRIE 3174A016, KINGSLAND 3174A016, AIC 3174A016, WDPART 3174A016.