Hydraulics and linkage

John Deere 1020, 1030, 1040, 1120, 1130, 1140, 1530, 1550, 1630, 1640, 1750, 1830, 1840, 1850, 1950, 2020, 2030, 2040, 2120, 2130, 2140, 2240, 2255, 2350, 2355, 2440, 2550, 2555, 2640, 2750, 2755, 2855N, 2940, 2950, 3030, 3055, 3150, 3155, 3255, 820, 830, 840, 930, 940