Why does the wedge of the Güde GHS 520 7 TE splitter rise immediately after being lowered to the bottom position?

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If the wedge of your Güde GHS 520 7 TE splitter rises immediately after being lowered to the bottom position, it indicates a hydraulic problem preventing the system from maintaining pressure. Here are the main causes and their solutions, to be checked in this order.

Insufficient hydraulic oil level - This is the most common cause. Your splitter contains 3.5 liters of HLP 46 hydraulic oil. Check the level on the reservoir gauge. If the level is too low, top up the oil to the mark. Insufficient oil creates a pressure loss that prevents the wedge from staying locked in the bottom position.

Defective or clogged hydraulic valve - The control valve maintains system pressure. If the hydraulic piston on the valve does not adhere completely, pressure escapes and the wedge rises. Clean the valve by ensuring that the piston moves freely. Also check that all screws on the lowering rod are tight, as a bent or misaligned rod prevents the piston from adhering. If the valve is too damaged, only a qualified repair shop can replace it.

Checking hydraulic circuits - Check the tightness of all hydraulic hoses and connections around the main cylinder. Even a small leak reduces pressure insufficiently. Also inspect the bottom of the reservoir: if debris accumulates there, it can clog the pipes and reduce flow, preventing the system from maintaining the load. Clogging can be resolved by cleaning the hoses.

Mechanical cleaning and lubrication - Wood sap sometimes creates a sticky layer that interferes with the locking mechanism. Clean the splitting column (80 x 120 mm) and the wedge guides with a damp cloth. Then apply a lubricant to the lowering rod and sliding elements to ensure smooth operation.

Two-lever control system - Check that the two-lever control operates correctly. Incorrect handling or a misaligned lever can prevent load maintenance. Ensure that the levers return to the neutral position after each use.

If after these checks the wedge continues to rise immediately, contact an authorized Güde repair shop at +49 (0) 79 04 / 700-360 or support@ts.guede.com, as this indicates an internal failure of the hydraulic system requiring professional expertise.

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