37D1559 SPRING.  Oil Pressure Relief Valve Spring.

Relief valve spring for both engines with a separate cast iron relief valve assembly and engines with a built in relief valve in the oil pump.  See the diagram for a detailed view of both set ups.

Compatible with engines:

• BMC 2.6T/TA, 3-Cylinder diesel engine (check dimensions)
• BMC 3.4T/TA/TD, 4-Cylinder diesel engine (check dimensions)
• BMC 2.8T/TD, 3-Cylinder diesel engine (E 2959 onwards)
• BMC 3.8T/TA/TD, 4-Cylinder diesel engine (E 49195 onwards)
• BMC 5.1 and 5.7, 6-Cylinder diesel engine
• Leyland 4/98NT/DT/TT, 4-Cylinder diesel engine
• Leyland 6/98NT/DT/TT, 6-Cylinder diesel engine
• Thornycroft T230, T345 marine
• Commodore 3.8 marine

Fitted to tractors, trucks and machinery:

• Nuffield 342, 460, 10/42, 10/60, 3/45, 4/65
• Leyland 344, 384, 255, 270, 262, 272, 462, 472, 282, 482
• Leyland 602, 604, 702, 704, 802, 804
• Leyland 285, 2100, 485, 4100
• Marshall 602, 604, 702, 704, 802, 804, 904XL
• Marshall 100, 115, 125, 145
• JCB 2B Mk2, JCB 3C Mk2.  JCB 3C Mk3, JCB 3D, JCB 4D
• BMC and Leyland Trucks