"3072ES / 3772ES / 3772ES HD" Service & Parts Manual October 2008
Page 1-13
STEERING CIRCUIT
Note: Refer to
Hydraulic Manifold
and
Relief Pressure Adjustment Procedure
.
Refer to
Cylinder Repair
.
Refer to
Section 3
for Remove and Replace instructions.
Refer to
Parts Section E
for hose routing.
• The wheel motor housings have pivots on the top and bottom, and are mechanically linked
together via a tie-rod.
• Steering is accomplished hydraulically using two (2) double-acting cylinders, and a 4-way
3-position solenoid-operated hydraulic directional control cartridge valve.
• Maximum steering pressure is limited by the relief valve.
Wheel Motor
Tie Rod
Motor
Housing
Pivot
Steer
Relief
Valve
Steer
Control
Valves
Steer
Left
Port
Steer
Right
Port
Steer Left
GRN/RED
Steer Right
ORG/WHT
Motor
Housing
Motor
Housing
Pivot
Left Steer Cylinder
Steer Left Hose
MAIN HYDRAULIC MANIFOLD
Front View Right Side ViewLeft Side View
Steer Right Hose
Right Steer Cylinder
ART_2551
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