User guide

M0247-01Model 4900
6-42 Rev. 5/14
TM
Lubrication and Maintenance
HYDRAULIC VALVE BLOCK FUNCTIONS
Valve Assembly Name Function
A17851 Front Hitch Block Connects the hoses from the tractor to the planter hosing.
Houses flow divider valve for lift circuit.
A17855 Marker/Fold Block Located on top of the lift circuit block on the left wing. Contains
control valves and flow control valves for left and right markers. Contains control valves for the fold circuit.
A17853 Lift Circuit Block Bottom block on left and right wings. Contains control valves that
allow the center axle to be raised to transport position and wing wheels to be raised for transport.
A17852 Rear Junction Block Connection point for all center rear hoses. A17854 Options and Wing Down Pressure Located on the right wing, on top of the right wing lift circuit block.
Contains the pressure reducing valve for wing down pressure and serves as a junction point for ASD, liquid fertilizer pump circuits and auxiliary functions.