Setting the Pressure Relief Valve on Jungheinrich ETMV 10-12 Forklift Truck

This guide provides detailed steps for setting the pressure relief valve on a Jungheinrich ETMV 10-12 forklift truck, as well as adjustments for the lowering speed and the line break safety device.

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Pressure Relief Valve Adjustment:

1. Bleed the Hydraulic System:
   • Locate the bleed screw on the lift cylinders.
   • Use a torque wrench to tighten the M6 bleed screw to a maximum of 7 Nm.
2. Set the Pressure Relief Valve:
   • With the hydraulic system at operating temperature, adjust the pressure relief valve (Valve 1) to the nominal load pressure plus 15 bar.
   • The factory setting of the pressure relief valve is 200 bar.
   • After adjustment, secure the setscrew with sealant to prevent loosening.

Line Break Safety Device Control:

1. Adjust Lowering Speed:
   • The maximum permissible lowering speed in the mast lift is 0.6 meters per second.
   • Adjust the lowering speed by turning the setscrew (Valve 2) until the line break safety devices activate.
   • Do not completely unscrew the setscrew.
   • After testing, reset the lowering speed to its original setting.
   • If the tolerance level is exceeded, check and adjust the line break safety device setting or replace the device if necessary.

Lowering Speed Setting:

1. Setting the Lowering Speed:
   • Ensure the load pickup device in the mast lift is at 0.5 meters per second, plus or minus 15%.
   • To reduce the lowering speed, turn the setscrew (Valve 2) on the flow controller clockwise.
   • After setting the speed, secure the setscrew with sealant.

By carefully following these instructions, you can ensure that your Jungheinrich ETMV 10-12 forklift truck operates safely and efficiently, maintaining proper hydraulic pressures and safe lowering speeds.

For more Jungheinrich trouble repair case,please refer to Jungheinrich Trouble Repair