Common Log Splitter Problems And What To Do When They Appear

Hydraulic log splitter systems use pressurised fluid to generate the force behind a wedge that splits wood. If your splitter feels weak or isn’t performing as it should, there’s a strong chance something in the hydraulic system or the splitting setup needs attention.

Need replacement parts for your log splitter?

If your log splitter is losing force, shaking, failing to return, or showing signs of pump, hose, ram, or valve issues, you may need to replace worn hydraulic components.

Browse Log Splitter Kits & Components | Ask Flowfit for advice

Before you start

Check the log itself: green or oversized timber may require more force than your splitter can provide.
Make sure the log is loaded straight and supported correctly, not angled or overhanging.
Inspect the wedge: heavy use can blunt the edge and reduce splitting performance.

Troubleshooting Common Hydraulic Log Splitter Problems

If the log, loading position, and wedge are all in good order, the next step is to look more closely at the hydraulic system. The checks below cover the most common causes of weak performance, slow movement, or unusual behaviour.

For replacement hoses, pumps, valves, rams, and related hydraulic parts, browse our Log Splitter Kits & Components range.

Experiencing vibration or shaking when using the log splitter?

Vibration or shaking is often caused by low hydraulic oil or air trapped in the oil lines. Even if the reservoir looks full, air can still enter if there’s a loose fitting, worn seal, or the system hasn’t been bled correctly.

Check oil level and top up to the recommended mark.
Bleed the system by opening the bleed valve and cycling the pressure plate back and forth a few times.
Inspect fittings and valves to ensure everything is secure before running the splitter again.

If fittings, valves, or hydraulic lines are worn or damaged, replacing them can help restore smoother operation. View our log splitter hydraulic components to find suitable replacement parts.

Losing driving force when splitting wood?

A loss of driving force, especially when the pressure plate also moves slowly, can point to air in the lines or an oil leak. Both reduce effective pressure and flow to the ram.

Bleed the system by opening the bleed valve and cycling the pressure plate several times.
Check for leaks along hoses, fittings, seals, and around the ram.
Consider temperature: hydraulic oil is more viscous in cold weather, so performance may feel weaker until the unit warms up.

If none of the above resolves the issue, the splitter may require a piston or pump replacement. It’s also worth checking that shipping plugs are correctly in place by disconnecting the hydraulic hoses, removing the plugs, and refitting them properly.

Where loss of force is caused by a worn pump, leaking hose, damaged ram, or faulty valve, you can compare replacement options in our Log Splitter Kits & Components category.

Is the ram returning?

If the ram extends but won’t retract, the nut for the ram may have come off the piston.

With the engine off, hold open the valve and push the ram back in using a narrow rod. If this issue has occurred, it’s best to contact the Flowfit team to discuss replacing the nut and preventing further damage.

If the ram, valve, or related hydraulic parts need replacing, browse our log splitter kits and components or contact our team for advice.

Safety note

Log splitters are relatively simple and often straightforward to maintain, but if issues persist or you’re not confident carrying out checks, seek professional advice before continuing to use the machine.