Preventive maintenance for can-filling machines and seamers
An unexpected stop in your canning line can cost thousands of euros per hour, degrade product quality, and jeopardize delivery deadlines. The good news is that most of these breakdowns can be avoided with an effective preventive maintenance plan for the canning line.
Preventive maintenance for filling machines and can seamers is not just a technical routine: it ensures continuity, productivity, and safety in the canning industry. In this post, discover the key steps and best practices to keep your machinery in optimal condition, reduce downtime, and extend its service life.
Why is preventive maintenance important?
When we talk about the maintenance of fillers and seamers, we are not only referring to repairing what breaks down, but above all to anticipating failures before they happen. Unplanned interruptions in the production line lead to production losses, high emergency repair costs, and risks of failing to meet delivery deadlines.
In addition, a well-managed preventive maintenance plan allows you to:
- Extend the equipment’s service life.
- Improve operational efficiency and reduce energy consumption.
- Prevent filling or seaming defects that could damage product quality.
- Increase operational safety and regulatory compliance.
Key factors when designing a maintenance plan
For industrial machinery maintenance to be effective, having a schedule is not enough: the plan must be adapted to the specific characteristics of the equipment, workload, and particular risks. These are the essential factors you should take into account:
Inspection frequency (daily, weekly, monthly)
- Daily: quick checks at the beginning and end of each shift. Check noise, vibrations, leaks, air pressure, residue build-up, and abnormal component temperatures.
- Weekly: more detailed inspection of access points, belts, alignments, electrical connections, and lubrication points.
- Monthly: partial dismantling of critical components and assemblies, inspection of sensors and control systems, wear analysis of parts, and fine tuning of filling and seaming parameters.
The specific frequency will depend on the intensity of use, product type, environmental conditions, and manufacturer recommendations. A good plan combines these three levels in order to act before a breakdown occurs.
Inspection of critical components
Identify the elements with the highest risk of wear or failure: gaskets and seals, valves, pumps, nozzles, bearings, shafts, seaming rolls, sensors, motors, and drives:
- In filling machines, valves or filling pistons are vulnerable points if residue builds up or wear occurs.
- In seamers, the seaming rolls must be thoroughly inspected and overhauled if possible en lugar de refurbished if they show wear. Lid guides, pistons, and seaming spindles should also be checked.
During the inspection, you should look for:
- Excessive play, looseness, or misalignment.
- Rust, corrosion, or build-up of residual product.
- Correct transport of the container and/or lid at all stages.
- Abnormal readings in sensors or control systems.
Cleaning and lubrication
Cleaning is essential: preventing residue buildup in passageways, gears, guides, or contact surfaces will help avoid blockages, abrasion, or product contamination. Properly applied lubrication minimizes friction, reduces heat, and extends component life.
Best practices:
- Use lubricants that meet the manufacturer’s recommendations and the food industry environment (food-grade lubricants).
- Check oil/grease levels and replace them according to the recommended interval.
- Apply lubricant to standard points (bearings, guides, chains) and critical areas.
- Clean and dry surfaces before applying lubricant to avoid mixing residues.
- To ensure grease is properly distributed throughout the machine, it is advisable to run the machine for a few minutes.
Checking consumables and materials
It is equally important to monitor the condition and quality of consumables: seals, tubes, hoses, fastening screws, and wear spare parts. Maintaining a controlled stock of critical parts prevents delays during urgent replacements.
Packaging materials or cans must also comply with the recommended specifications; deformed cans, defective lids, or thickness variations can strain the machines and accelerate wear.
Staff training and operational responsibility
A preventive maintenance plan for filling machines and seamers only works if operational staff know and correctly apply the procedures.
Therefore, it is very important to ensure:
- Regular theoretical and practical training in basic maintenance, fault detection, tool use, safety, and cleaning.
- Clear assignment of responsibilities: who does what, when, and how.
- Protocols with easy-to-follow checklists.
- A culture of early anomaly reporting: small warning signs should be communicated before they become failures.
A well-trained operator can detect vibrations, changes in sound, or abnormal behavior that the scheduled plan may not foresee.
Monitoring and analysis of machine performance
Integrating condition and performance indicators often helps anticipate problems. Some useful techniques we recommend include:
- Recording operating hours, completed cycles, and production output.
- Measuring temperature, vibration, electrical currents, or sensor signals at critical points.
- Trend analysis: gradual variations may indicate wear or misalignment.
- Preventive alarms in the control system to alert when a parameter deviates from the expected range.
This continuous monitoring allows interventions to be carried out when components enter the risk zone, rather than after they have already failed.
Updating components and software
In today’s industrial environment, machines age not only mechanically but also technologically. To maintain effective preventive maintenance for fillers and seamers, it is important to:
- Review control software versions and update them when improvements in efficiency, stability, or integrated diagnostics are available.
- Replace obsolete components with more modern alternatives (sensors, frequency drives, controllers) that offer greater reliability.
- Assess the integration of self-diagnostic modules, telemetry, and connectivity (IoT) to anticipate failures.
- Replace wear parts before they fail: rollers, bearings, seals, etc.
Safety and applicable regulations
Any maintenance plan must include staff safety and comply with current regulations (industrial safety, food hygiene, and machinery directives). Some recommendations from Ezquerra Group are:
- Lockout/tagout (LOTO) before intervening on powered machinery.
- Use of PPE (gloves, goggles, hearing protection) during maintenance operations.
- Inspection of safety elements: emergency stops, guards, and presence sensors.
- Compliance with local regulations (for example, the EU Machinery Directive) and food standards where applicable.
- Verification that lubricants, oils, and products used comply with environmental and industrial safety regulations.
Incident recording and traceability
Keeping systematic records is essential to improving the plan over time. To avoid more serious problems, it is recommended to:
- Document every inspection, intervention, or replacement with date, operator, involved parts, and identified cause.
- Generate records by machine, component, or type of failure.
- Analyze recurring patterns (for example, frequent failures in a specific bearing) to adjust frequency or design.
- Use maintenance software (CMMS) whenever possible to manage tasks, alerts, and traceability.
This traceability enables continuous improvement of the maintenance plan, resource optimization, and the justification of decisions during audits or inspections.
Economic and operational benefits of preventive maintenance
Let’s look at how a good maintenance plan impacts concrete results:
Reduced unplanned downtime
Every hour of downtime incurs direct and indirect costs. Preventive maintenance significantly reduces these interruptions.
Lower repair costs
Replacing parts before failure prevents collateral damage and major repairs.
Higher performance and product quality
Well-calibrated, well-maintained machines maintain consistent filling density and perfect seams, reducing rejects and returns.
Extended equipment service life
With constant care, equipment does not require premature replacement.
Safety and regulatory compliance
Fewer risks for operators and fewer penalties for regulatory non-compliance.
Improved image and customer confidence
Reliable production lines reinforce operational strength in the eyes of clients and buyers.
Preventive maintenance backed by Ezquerra Group
With decades of experience in the sector, Ezquerra Group supports companies in implementing preventive maintenance plans for fillers and can seamers, offering everything from equipment reconstruction and modernization to specialized technical assistance and regulatory adaptation. Thanks to their expertise and comprehensive services, companies can ensure production continuity, reduce costs caused by unexpected downtime, and maintain the highest quality standards in every package.
Therefore, if you want to implement a preventive maintenance plan together with the support of Ezquerra Group, you will benefit from a solid strategy backed by technical expertise, reconstruction capabilities, and technological upgrading.
