A-31745121-AI Spring, Valve Outer

One New Aftermarket Replacement Outer Valve Spring for Perkins Engines

This outer valve spring is a direct replacement for Perkins 4-cylinder and 6-cylinder diesel engines, including the widely used 4.236, A4.236, T4.236, 4.248, A4.248, and 6.354 engine series. It is part of the cylinder head valve train assembly, working in tandem with the inner valve spring to maintain precise valve timing and seating under engine operating pressures. This part is distributed under the A&I Products aftermarket label (prefix A-).

Specifications

• Type: Outer (outer of dual-spring valve assembly)
• Inner Diameter: 28 mm (approx. 1.102 in)
• Outer Diameter: 36.5 mm (approx. 1.437 in)
• Free Length: 64.6 mm (approx. 2.543 in) / approx. 2.500 in per alternate source
• Coils: 8

Compatible Engines

Perkins: 4.236, A4.236, T4.236, 4.248, A4.248, 6.354

Compatible Equipment

Fits Massey Ferguson: 698, 3065, 3370 (Perkins T4.236-powered models; verify engine code before ordering)

Claas: Combine harvesters equipped with Perkins 4.236, 4.248, or 6.354 engines

Fits New Holland: Equipment fitted with Perkins 4.236-series engines

Fits JCB: 4CX Backhoe, 410M Forklift, 415 Loader, 520S Loadall (T4.236 engine)

Replaces Part Number(s):

31745121, A-31745121-AI

Aftermarket Interchange Numbers

735521M1, 733823M1, 747814M1, 747814V1, 735521V1, 780272, 0780272, 3118133R1, 30/45-4

New aftermarket replacement part - not remanufactured, not used.