WESPC Valve Spring 3174A025 For Perkins 1004 1104 1106 Diesel Engine

Application:

3174A025 is the outer (and often inner) valve spring for 4-, 6- and 8-cylinder Perkins 1004/1104/1106 diesels (4.4–8.8 L) used in JCB 3CX/4CX back-hoe loaders, MF 5400/6400 tractors, 45–250 kVA generator sets, Claas combine harvesters and marine auxiliaries. It controls inlet & exhaust valve motion at speeds up to 3 000 min⁻¹ while meeting EU Stage IIIA / EPA Tier 4-final emission limits.

Technical specifications:

Free length 48 mm, outer diameter 29 mm, wire diameter 3.2 mm, 6 active coils, solid length 28 mm. Material is chrome-vanadium spring steel (50CrV4) oil-quenched and tempered to 47 HRC, then shot-peened to 0.25 mm A-intensity to raise fatigue life to 1 × 10⁷ cycles. Installed load 210 N at 40 mm, solid load 480 N at 28 mm, giving a safety margin of 1.2 against coil bind. Surface is phosphate-coated 3 µm for 96 h salt-spray protection and lightly oiled for corrosion-free storage.

Material & performance features:

The 50CrV4 alloy (0.5 % C, 1 % Cr, 0.15 % V) offers 1 600 MPa tensile strength and 8 % elongation, resisting surge-set when exhaust temperature reaches 700 °C. Controlled shot-peening induces 400 MPa compressive stress on the outer surface, delaying fatigue crack initiation and extending service life to 12 000 h.

Interchange part numbers:

PERKINS 3174A025, T417515, AGCO 4226319M1, 4227429M1, KMP 3174A025, FPS VS3174A025, ITM VOE3174A025, FAI VS3174A025, AJUSA 8103174A025, GLYCO VS-Per 1004/1104, MAHLE VS-3174A025, AE 3174A025, CLEVITE VS-3174A025, TOPLINE 3174A025, VMC 3174A025, MARINE D’USTRIE 3174A025, KINGSLAND 3174A025, AIC 3174A025, WDPART 3174A025.

WESPC(Dongguan)Tech Co., Ltd. is a wholly-owned subsidiary of WESPC Hong Kong.

The company has long been deeply engaged in the Perkins aftermarket spare parts sector, while also covering a wide range of multi-brand engines and related components. With years of professional expertise and a solid reputation, WESPC provides customers with diverse, one-stop solutions tailored to their needs.

Leveraging the global vision of its Hong Kong headquarters and the strategic location advantages of Dongguan, WESPC Dongguan is committed to building a highly efficient and reliable supply chain system, supported by professional technical expertise and comprehensive after-sales services, to continuously create greater value for its customers.

Looking ahead, the company will continue to expand its business landscape, keep pace with industry trends, and consistently enhance product and service quality—working hand in hand with global partners to achieve mutual growth and success.