- Implement and steering pump
- Combination valve
- Implement control valves
- Cylinders and the circle drive
The implement and steering pump transfers oil from the hydraulic tank to the implement cylinders and the circle drive through the implement control valves. The combination valve provides the priority for the steering circuit. The combination valve also transfers load signals from the implement control valves to the implement and steering pump.
| |
| Illustration 1 | g06424151 |
|
Front view of typical linkage and valve group (1) Right blade lift control (lever) (2) Wheel lean control (lever) (3) Articulation control (lever) (4) Centershift control (lever) (5) Circle drive control (lever) (6) Blade tip control (lever) (7) Sideshift control (lever) (8) Left blade lift control (lever) (9) Left blade lift control valve (10) Sideshift control valve (11) Circle drive control valve (12) Blade tip control valve (13) Articulation control valve (14) Centershift control valve (15) Wheel lean control valve (16) Right blade lift control valve | |
| |
| Illustration 2 | g06424485 |
|
Left implement control valve (9) Left-hand Blade Lift Control Valve (10) Sideshift Control Valve (11) Circle Drive Control Valve (12) Blade Tip Control Valve (17) Blade Cushion (if equipped) (18) Left-hand Blade Lift Cylinder (19) Swivel (20) Sideshift Cylinder (21) Blade Tip Cylinder (22) Circle Drive Motor | |
| |
| Illustration 3 | g06424536 |
|
Right implement control valve (13) Articulation control valve (14) Centershift control valve (15) Wheel lean control valve (16) Right blade lift control valve (22) Articulation Cylinder (23) Centershift Cylinder (24) Wheel Lean Cylinder (25) Blade Cushion (if equipped) (26) Right-hand Blade Lift Cylinder | |
There are eight standard implement circuits on the machine. Seven control valves are for cylinder circuits and one control valve is for the motor that rotates the blade around the drawbar. The hydraulic system can accommodate as many as 14 implement control valves. The individual control valves regulate the operation of each implement. Control levers are used for operating the implement control valves. The control levers are on the operator console. The control valves are on both sides of the steering wheel.
Some of the Motor Graders may have different implements. The number of the control valves in each valve group may vary. When an implement control valve is replaced, use the same part number. Using the same part number will keep the control valve and the cylinder matched.
Reference: For additional information on the hydraulic system, refer to the hydraulic schematic for your machine.