WESPC Exhaust Valve 31431881 For Perkins 4.236 4.248 6.354.2 A4.236 T4.236 6.354 6.354.1

WESPC Exhaust Valve 31431881 For Perkins 4.236 4.248 6.354.2 A4.236 T4.236 6.354 6.354.1

Application:

This exhaust valve is machined for the Perkins 4.236, 4.248, 6.354.2, A4.236, T4.236, 6.354, 6.354.1, 6.354.4, AT6.354 and G4.236 naturally aspirated and turbo-charged diesels, consequently it is fitted to Massey Ferguson 165-398 series tractors, MF 30-50 back-hoe loaders, MF 550-890 combines, Landini 7860-8880 row-crop tractors, Claas 65-75 forage harvesters, JCB 3CX/4CX back-hoes, New Holland 1116 swathers, 1495/1496 mower-conditioners, Volvo BM 2200 industrial forklifts, FG-Wilson P100-4 and P135-4 generator sets and a wide spread of irrigation, construction and marine auxiliaries that use the above engine families world-wide.

Technical specifications:

The valve head is 36.6 mm in diameter, seat angle 45°, overall length 123.3 mm and stem diameter 9.5 mm; the stem tip is induction-hardened to 52-58 HRC while the lower stem carries a gas-nitrided layer 0.03-0.05 mm thick giving a surface hardness > 850 HV to resist scuffing during prolonged high-temperature exhaust pulses typical of turbo-charged Perkins engines; head and stem are CNC-finished to Ra 0.2 µm to guarantee positive sealing and uniform heat transfer every cycle.

Material & performance features:

Hot-forged from 21-4N (5Cr21Mn9Ni4N) austenitic steel that retains 900 MPa tensile strength at 700 °C, the head is flash-chrome plated (≈3 µm) to cut friction and valve-guide wear while the nitride layer on the stem prevents micro-welding and maintains stable lash over thousands of hours in stop-start field service; the tulip profile is swirl-polished to improve flow co-efficient and reduce pumping losses, giving cleaner combustion and lower fuel consumption across the 4.236/6.354 engine map.

Interchange part numbers:

Perkins 31431881, 31431882, 31431883, 31431884; Massey Ferguson 741466M1, 747552M1, 739027M1; Landini 31431881; JCB 333/E0002; Caterpillar 387-9432; KMP 31431881; AE 20946; Mahle 043VE30835000; Bepco BV31431881; SBI 01785.

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.