Select the symptoms you observe in your cylinder; see the possible causes, the urgency level, and the first checks you can perform.
This guide is for general information; never work on a cylinder under load without safety precautions.
Most hydraulic cylinder failures are caused by worn sealing elements, rod surface damage and contaminated oil. External leakage usually originates from the rod seal or wiper seal; drifting down on its own under load is most often caused by internal leakage past the piston seal — although a leaking valve can produce the same symptom.
For an accurate diagnosis, you first need to determine whether the problem lies in the cylinder or on the valve/pump side. When the problem is cylinder-related, early overhaul prevents damage to the rod and barrel, reducing overall cost.
Push and pull force, oil volume, speed and the ISO 3320 bore required for your load.
Open toolAllowable push force by mounting type, slenderness and the safe minimum rod diameter.
Open toolDefine your cylinder in 5 steps and send a complete quote request in one go.
Open toolAnswer a few questions to see whether an overhaul or a new cylinder suits you.
Open toolPump motor power, hose / port flow velocity and rod-side return flow.
Open toolForce per stage, total stroke and oil volume; last-stage load check.
Open toolInstant conversion between bar–psi–MPa, kN–tonne–lbf, mm–inch and L/min–GPM.
Open toolSend us your calculated values and application details, and our team will get back to you about new manufacturing or revision work.
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