The Jungheinrich ETMV 10-12 regenerative lowering hydraulic system is an advanced feature that enhances the performance and efficiency of Jungheinrich trucks. This system consists of separate hydraulic circuits for lifting and lowering, as well as auxiliary functions. In this article, we will explore the various settings and procedures required for optimal operation of the hydraulic system.
Lifting Hydraulics:
To ensure proper functioning of the hydraulic system, it is crucial to set the pressure relief valve correctly. Begin by bleeding the hydraulic system and ensuring the operating temperature is reached. Set the pressure relief valve to nominal load pressure +15 bar. Once the valve is set, secure the setscrew with sealant. The factory presetting for the pressure relief valve is 200 bar.
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Line Break Safety Device Control:
The line break safety device plays a crucial role in the safe operation of the mast lift. To control the maximum permissible lowering speed, follow these steps:
1. Remove the connector from the solenoid.
2. Raise the load pickup device to the mast lift and set the key switch to “0”.
3. Ensure the foot switch (deadman switch) is not activated.
4. No individuals should be near the load pickup device during this control.
5. If the line break safety device is not activated, close the solenoid by removing the voltage supply.
6. Apply a separate 48V voltage to suddenly open the solenoid.
7. The line break safety device should be activated when the load pickup device lowers. If the tolerance level is exceeded, check and adjust the line break safety device setting. If necessary, replace the line break safety device.
Lowering Speed Setting:
When checking and setting the lowering speed, make sure the nominal load in the mast lift is 0.45 m/s + 0.05 m/s.
Hydraulic Auxiliary Functions:
The pressure relief valve for trucks with mast tilt needs to be set to 150 +10 bar. However, for trucks with fork tilt, the factory pre-setting of 180 bar is sufficient and requires no further adjustment.
For adjusting the speed setting and “Teach In” of the auxiliary functions, use the service program according to Tables 2-4. This adjustment can be made via the LISA in the SERVICE MODE menu or for the ETVQac 20/25 via the ABE.
Conclusion:
The Jungheinrich ETMV 10-12 regenerative lowering hydraulic system is a valuable feature that enhances the performance and safety of Jungheinrich trucks. By following the recommended procedures for setting the pressure relief valve, controlling the line break safety device, and adjusting the auxiliary functions, operators can ensure optimal functioning of the hydraulic system. Regular maintenance and adherence to the manufacturer’s guidelines will prolong the lifespan and reliability of the system, leading to improved productivity and safety in material handling operations.
For more Jungheinrich trouble repair case,please refer to Jungheinrich Trouble Repair
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