ATJ6612. Nuffield & Leyland Hydraulic Pump Drive Gear.  Made in England.

Fitted to the ATJ6597 Hydraulic Pump. Keyed to the shaft with the WKN506 Half Moon Key.

This gear is required when converting Nuffield 10/42 and 10/60 to the later hydraulic pump kit ATJ6597K.

See item number 14 in the illustration.

Fitted to tractors: 

• Nuffield: 10/42, 10/60, 3/45, 4/65
• Leyland: 253, 245, 344, 384, 255, 270, 262, 272, 462, 472, 282. 482, 502
• Marshall: 502