Operating Single-Acting Cylinders
A single-acting cylinder will typically have only one hose that needs to be connected. Connect the hose to the left side of a coupler "EXTEND" that is on the desired circuit.
In order to extend the cylinder, pull the control lever in the rearward direction to the EXTEND position. In order to retract the cylinder, push the lever fully forward to the FLOAT position. The lever will not automatically return to the HOLD position when the cylinder reaches the end of the stroke.
Note: Always use the FLOAT position to retract a single-acting cylinder. The RETRACT position is only for double acting cylinders.
Operating Double Acting Cylinders
Connect the pressure hose from the double acting cylinder to a left side coupler "EXTEND" on the circuit that is desired. Connect the return hose to the right side coupler "RETRACT" of the same circuit.
In order to extend the cylinder, pull the corresponding implement control lever to the EXTEND position. In order to retract the cylinder, push the lever to the RETRACT position.
Pushing the lever fully forward will select the FLOAT position. The FLOAT position will allow the cylinder to freely extend. Also, the FLOAT position will allow the cylinder to freely retract. The FLOAT position is useful when you operate equipment such as scraper blades and loaders.
Purging Air From Remote Cylinders
Prior to using, bleed any trapped air that is in a cylinder. A cylinder that is new may require the air to be purged.
In order to purge the air, connect the hoses to the machine. Position the cylinder with the hoses in the UP position. Extend and retract the cylinder 7 or 8 times. Check the hydraulic oil level of the machine before operating the cylinder and after operating the cylinder.
Operating Hydraulic Motors
 | |
| Illustration 1 | g00354054 |
| NOTICE |
|---|
If the HOLD position is used to stop the motor, damage to the motor and related hydraulic components can occur, due to the HOLD circuit creating a hydraulic lock effect, forcing the hydraulic motor to stop suddenly. |
Hydraulic motors can be connected to any implement control valve. Connect the pressure hose for the motor to the right side coupler "RETRACT". Connect the return hose to the left side coupler "EXTEND".
Use the corresponding flow control in order to regulate the speed of the motor. This will ensure that the hydraulic system will only supply the oil that is required by the motor. Extra pump capacity will not be used except when other remote valve sections are operated.
Prior to starting the engine, push the lever fully forward into the FLOAT position. Lock out the HOLD and EXTEND position by fully rotating the rotary lever locking device in the counterclockwise direction. The FLOAT position is used as the OFF control for the motor. The RETRACT position engages the motor. Using the FLOAT position to stop the motor will allow the motor to coast to a stop.
Do not open any bypass valves in the equipment or in the motor. Use the flow control valve in order to control the speed of the motor.
Do not hold the control lever in order to operate the motor. When the detent will not hold the lever in the RETRACT position, check the equipment for proper adjustment or consult your CLAAS dealer for assistance.
Hydraulic motors often demand a high hydraulic oil flow rate. Excessive heat and pressure drops can be caused by large flow rates that pass through the quick couplers and the implement control valves. This machine is equipped with tees for the addition of power beyond. Power beyond is defined as the connection to a machine's hydraulic system without the use of an implement control valve. See Operation and Maintenance Manual, "Power Beyond Connections" for more information.
See the implement's "Operators Manual" for information on the implement and for information on the hydraulic motor.
Selection of Hydraulic Motors
The implement hydraulic system is a closed center, load sensing hydraulic system. The hydraulic system compensates for the flow and for the pressure. Use hydraulic motors that are designed for the machine's hydraulic system. Do not use a hydraulic motor that is designed for an open center hydraulic system unless the motor has been adapted by removing the restrictor for the inlet. Otherwise, excessive heating of the oil may occur.
Hydraulic motors that have 76 L/min (20 US gpm) at 15513 kPa (2250 psi) can be used. Hoses that have an inside diameter of 12.7 mm (.5 inch) are acceptable for motors that operate at less than 38 L/min (10 US gpm). Motors that require greater flow should use hoses that have an inside diameter of 19 mm (0.75 inch).
Operating Hydraulic Circuits Simultaneously
The flow priority for this machine is set up as a parallel logic hydraulic system. All of the implement control valves and the three-point hitch have an equal opportunity in order to obtain oil flow. The determining factor is the resolved pressure of each individual implement control valve. None of the implement control valves has a flow priority. If the flow demand is greater than the flow that can be supplied by the pump, the circuits with the lowest pressure will be satisfied first. The circuits with the highest pressures will be satisfied last.