NT3770 WASHER.  Belleville Washer. Various applications in Nuffield, Leyland and Marshall tractors. See list below.

1. Used to keep pressure on the main drive pivot housing and keeps the bearing in the upright position on the thrust bearing carrier.  You will use 4 washers per side, 8 washers per tractor.
View No.25 in this Drawing of P.T.O Clutch Operating Linkage.  

2. Used to keep pressure on the PTO Hand Lever shaft seal.  You will use 1 washer in this application.
View No.24 in this Drawing of Leyland P.T.O. Hand Control Cable Assembly.

3. Used to give the hydraulic levers resistance to keep them in a set position. You will use 5 washers per lever, 10 washers per tractor.
View No.32 in this Drawing of Nuffield Hydraulic Levers.

4. Used to keep resistance on the depth control lever. You will use 2 washers in this application.
View No.6 in this Drawing of the Nuffield Depth Control Lever.

Fitted to:

• Nuffield 3DL (Universal Three), Nuffield 4DM (Universal Four)
• Nuffield 342, 460, 10/42, 10/60, 3/45, 4/65
• Leyland 253, 245, 344, 384, 255, 270, 262, 272, 462,472, 282, 482, 502, 602, 604, 702, 704, 802, 804
• Leyland 285, 2100, 485, 4100
• Marshall 502, 602, 604, 702, 704, 802, 804, 902XL, 904XL