The Sunflower Seed Oil Hot Pressing Machine from Qi'e Grain and Oil Machinery Co., Ltd. is designed for continuous commercial oil processing. Proper maintenance helps protect oil yield, maintain stable preheating performance, reduce unplanned downtime, and extend the service life of the screw shaft, bearings, drive components, and oil outlet system.

This field guide covers routine inspections, operating checks, shutdown servicing, common faults, safe isolation, and the conditions that require professional technical support. Always follow the machine-specific operating instructions and safety procedures provided by Penguin Group.

Maintenance priorities for hot pressing

Hot pressing performance depends on the coordinated condition of the preheating system, feeding section, screw pressing chamber, drive system, bearings, and oil outlet. Maintenance should therefore focus on stable seed temperature, clean material flow, correct lubrication, secure fasteners, and timely removal of residue.

Pre-start inspection checklist

Before each production run, trained operators should complete a visual and operational inspection:

• Check that the machine is clean, securely installed, and free from loose tools, foreign objects, and accumulated sunflower seed residue.
• Inspect the power connections, control panel, emergency stop device, guards, and protective covers for visible damage.
• Confirm that the screw shaft, transmission components, bearings, and fasteners show no obvious looseness, leakage, or abnormal wear.
• Check the preheating system and temperature controls for secure connections and normal operating condition.
• Verify that the feeding inlet and oil outlet are clear and that collection containers are correctly positioned.
• Confirm that lubrication points are serviced according to the equipment instructions. Do not use unsuitable or excessive lubricant.
• Make sure the sunflower seeds are prepared according to the production process requirements, with no stones, metal, or other hard foreign matter.

Operating checks during production

Common faults and practical checks

Shutdown and preventive maintenance

1. Complete the normal shutdown sequence: stop feeding material according to the operating procedure and allow the press to clear safely.
2. Clean key working areas: remove seed residue from the feed inlet, pressing area, oil outlet, and accessible surfaces after the equipment has cooled sufficiently.
3. Inspect wear and fastening points: look for looseness, cracks, leakage, deformation, or unusual contact marks on accessible components.
4. Review lubrication condition: service bearings and other lubrication points in line with the machine manual and the selected lubricant specification.
5. Record operating observations: note changes in yield, temperature, vibration, noise, oil discharge, and stoppage events to support early fault diagnosis.
6. Schedule periodic servicing: inspection frequency should reflect production load, operating environment, material condition, and the recommendations supplied with the machine.

Safe isolation before servicing

Before removing guards, clearing a blockage, opening an inspection area, or working on electrical, heating, drive, or bearing components, stop the machine and isolate all relevant energy sources. Prevent accidental restart, allow hot components to cool, and verify that moving parts are no longer capable of movement.

Operators should perform only the inspections and cleaning tasks permitted by their training. Electrical repairs, heating-system work, component replacement, alignment, and other technical interventions should be completed by qualified service personnel.

When to contact professional service

• Oil yield remains below the expected process condition after feed and preheating checks.
• Abnormal noise, vibration, overheating, smoke, or repeated overload occurs.
• The preheating system or temperature control cannot maintain stable operation.
• A blockage cannot be safely removed using the approved procedure.
• Bearings, screw components, drive parts, or other critical components show significant wear or damage.
• Electrical faults, control-panel alarms, or repeated unexpected shutdowns cannot be identified by the operator.