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Brian TaylorAug 9, 2025
Why is there no motion, slow or jerky action in my Eaton Control Unit hydraulic system?
- WWilliam FullerAug 9, 2025
If your Eaton Control Unit's hydraulic system exhibits no motion, slow, or jerky action, it could be due to several reasons. The relief valve might not be properly set, stuck, or worn, requiring repair, cleaning, and readjustment. Alternatively, dirt or foreign particles might be lodged between the relief valve control poppet and seat, necessitating disassembly, cleaning, and reassembly. In more severe cases, the valve body could be cracked, requiring replacement of the valve section. Finally, ensure the spool is moved to its full stroke by checking its travel.







