The 50/100% switch is set to the 50% position: The valve settings do not correspond to the specifications. The wrong gear or stage in the vehicle's transmission is engaged: The pressure setting on the mast control unit is too low: The hydraulic pump is faulty:
Set switch 10 to the 100% position. Checking and adjustment must be carried out by WAITZINGER service. Engage the correct gear. Check and adjust the pressure setting according to the technical data sheet. Clean the pressure relief valve. The service department is allowed to check and adjust.