May 09, 2026

Why Your Oil Press Machine Is Not Extracting Oil Properly? (Fix Guide)

By Nilsan India

7 Reasons Your Oil Press Machine Not Extracting Oil Properly

You switched on the machine, fed the seeds, waited - and barely a trickle of oil came out. Or nothing at all.

If this has happened to you, do not panic. This is one of the most common oil press machine problems and solutions we deal with every day. And in almost every case, the reason behind low oil output is something simple - something you can identify and fix yourself without any technical help.

Let us go through every possible reason why your oil press machine is not extracting oil properly, and exactly what you need to do to fix it.

Reason 1: Seeds Have Wrong Moisture Level

This is the single biggest reason behind low oil output - and most people never consider it.

Seeds that are too dry cannot build enough pressure in the pressing chamber, so oil struggles to flow out. Seeds that are too wet create a different problem - the oil mixes with moisture and does not come out cleanly. Either way, your output suffers.

Fix: If seeds feel damp, sun-dry them for 2 to 4 hours before pressing. If they feel too dry, leave them in the open air overnight. Always use fresh seeds - old or improperly stored seeds consistently give poor oil yield.

Reason 2: Press Chamber is Too Cold

Cold chamber temperature is one of the most overlooked oil press machine problems and solutions, especially during winter or early morning operation.

When the chamber is cold, the oil thickens and cannot pass through the outlet gaps freely. You will notice the oil cake coming out feels wet and oily - which means the oil is trapped inside the machine instead of flowing out.

Fix: Always warm up your machine for 10 to 15 minutes before feeding seeds. Run a small trial batch first to heat the chamber naturally. If you are using a Cold Press Oil Machine with a heater option, switch it on before production begins - this one step alone can dramatically improve your output.

Reason 3: Blocked Oil Outlet

Continuous use causes the seed residue and oil cake particles to accumulate in the pressing chamber and block the oil outlet gaps. When this happens, oil has no clear path to flow out, and output falls off a cliff or stops entirely.

Fix: Switch off the machine, and wait until it cools down. Brush or use a thin cleaning rod to thoroughly clean the pressing chamber, outlet gaps, and filter screen. Always clean your Commercial Oil Press Machine after every 4 to 6 hours of use - this one habit prevents most output problems before they even start.

Reason 4: Worn Screw Shaft or Press Parts

In each pressing cycle, the screw shaft and pressing bar are under immense pressure. They wear out over time, and when they do, the machine cannot produce enough pressure to properly extract the oil.

Watch out for these warning signs - wet and oily cake, unusual noise when pressing or visible scratches on the screw shaft.

Fix: Periodically inspect your screw shaft and pressing bar. Look for uneven wear and replace worn parts without delay, especially if the machine has been running for a long time without any part check. Running worn parts too long causes bigger, more costly damage.

Reason 5: Overfeeding Seeds

A very common mistake is to pour too many seeds at a time into the hopper – especially for first time operators. The chamber jams. The pressure is uneven. The output is almost nil. The machine stops completely in some situations.

Fix: Feed seeds in a steady, moderate, and continuous stream, never dump a large amount at once e. In case of a jammed chamber, stop the machine immediately, clear the jam and restart with a smaller quantity. You will always get better results from frequent feeding than forcing them through.

Reason 6: Wrong or Mixed Seeds

Not all seeds behave the same in a press. Seeds with high-husk-content, very small seeds that slip through the gaps, or mixing two different seed types can lead to uneven pressure and low oil output.

Fix: Use the right seed for your specific model machine. Before pressing, find out which seeds work best in your Oil Expeller Press. De-shell seeds and clean them as necessary. Do not mix different kinds of seeds in one batch.

Reason 7: New Machine Not Broken In

If your machine is brand new and giving low output - do not worry. This is completely normal. New machines have tight internal parts that have not yet settled into their optimal operating position. Low output in the first few hours is expected.

Fix: Run your new machine through a 2 to 3 hour break-in period using inexpensive seeds like mustard. Gradually increase the seed quantity during this period. Output will improve naturally as the chamber heats up and parts settle in.

Quick Troubleshooting Checklist

Before you call anyone, go through this list:

Are seeds properly dried and at the right moisture level?
Did you warm up the machine before starting?
When did you last clean the pressing chamber and outlet gaps?
Is the screw shaft showing signs of wear?
Are you feeding seeds steadily without overloading?
Are you using the correct seed type for your machine?
Is this a new machine that needs a break-in period?

If even one answer is yes, you have found your problem.

Conclusion

Sometimes an oil press machine is not extracting oil properly, and it is frustrating - but most of the time the fix is much easier than you think. You can see a very good improvement in output by correcting even one of these - wrong seed moisture, cold chamber, blocked outlet, worn parts, or irregular feeding.

The real key is regular maintenance and the proper use of your machine from day one. A well-maintained oil press machine will produce consistent quality oil for years with no major issues.