Packaging Machine Preventive Maintenance: Building a Site-Specific Checklist

Generic maintenance checklists downloaded from the internet tend to fail in the same way. They list tasks every machine “should” have, attach a frequency no one can trace to a source, and get filled in by habit until a failure shows they missed something that mattered. A checklist works when each line traces to a reason and the list is reviewed against what actually breaks.

A site-specific list for packaging machines starts from four inputs. From those you build a task list, with the template and example rows by component category below, then handle energy isolation and set up a review loop that keeps the list accurate. Interval values are left to the sources that can justify them: the OEM manual and your site risk assessment.

How a site-specific checklist is built

Preventive maintenance means planned work done to reduce the likelihood of failure or degradation, as distinguished from corrective work done after a fault. Maintenance terminology references such as EN 13306 define these terms, which helps when a plant, a supplier and a service contractor need to use the same words.

The checklist for each machine draws on four inputs.

• The OEM manual. The supplier’s maintenance section is the starting point for tasks, methods and intervals, because the supplier knows the design.
• Failure history. The breakdown, short-stop and quality records for that machine show what has actually gone wrong on your product and in your environment.
• The risk assessment. The site’s assessment of maintenance hazards covers how energy is isolated and who may perform each task.
• Critical spares. These are the parts whose absence would stop the line for a long time, and they should drive both inspection tasks and stock decisions.

The inputs produce one task list per machine. The list becomes a schedule, and the records from carrying out the schedule feed back into the list through periodic review.

Start from the OEM manual

Collect the current maintenance sections for every machine and for bought-in components such as drives, pumps and sensors. Confirm the manual revision matches the machine’s build, since older manuals may predate a modification. If a manual is missing, ask the supplier for the current maintenance schedule before writing tasks from experience alone.

Add what your records show

Manuals cover the machine in general. Your records cover your conditions: abrasive or sticky product, dust, washdown, high changeover frequency. Failure history is where a task earns its place or loses it. A part that keeps failing between inspections means the task, the method or the basis for the interval needs to change.

Apply the risk assessment

Each task has hazards: moving parts, stored energy, hot surfaces, pressurized air, electrical equipment. The site risk assessment decides how each is controlled and who may do the task, and qualified people should carry it out. ISO 12100 gives a general method for machine risk assessment and risk reduction.

The task-list template

The template below has one row per task. The columns match the structure in Figure 1.

Column	What to write
Component	The part or assembly, using the same name as the manual and spare parts list
Task	The specific action: inspect, clean, lubricate, replace, test, calibrate
Method	How the task is done: visual, by feel, with a gauge, with a test piece, by procedure number
Interval basis	Where the interval comes from: OEM manual, site risk assessment, failure history, or operating counts
Skill	The competence needed: operator, maintenance technician, electrician, supplier service
Energy isolation (LOTO)	Whether the task needs energy isolation, which energy sources, and the procedure reference
Acceptance criterion	What counts as pass or fail, in a form two people would judge the same way
Record	What is written down and where: check mark, measured value, photo, work order

Example rows by component category

The rows below show the form for common component categories. They are not a complete list, and they give no intervals, because intervals depend on the machine, the product and the site.

Component	Task	Method	Interval basis	Skill	Energy isolation (LOTO)	Acceptance criterion	Record
Sealing jaws or heater bars	Inspect seal faces for wear, residue and damage; check cover or release material condition	Visual check; compare with a reference seal sample	Per OEM manual; adjust from seal-defect history	Maintenance technician	Required; follow site procedure for thermal and stored energy	Faces clean and undamaged; seal appearance matches the reference sample	Checked or replaced, with date and operator
Cutting knife or cross-seal knife	Inspect edge condition; check mounting security	Visual check; cut test on scrap material as set by procedure	Per OEM manual	Maintenance technician	Required	Clean cut; no burr or tearing as defined in the procedure	Condition noted; replacement logged
Drive belts and chains	Check wear, tension and alignment; look for debris	Visual; tension check by the method in the manual	Per OEM manual	Maintenance technician	Required	Within the manual’s stated limits	Condition and any adjustment noted
Gearboxes and lubrication points	Check oil level or grease condition; look for leaks; lubricate with the specified product	Visual; sight glass or grease points per manual	Per OEM manual	Operator or technician as trained	Depends on access; per site risk assessment	Level and condition as stated in the manual; no new leaks	Lubricant used and amount noted
Pneumatic components	Check for audible leaks; inspect hoses and fittings; check filter-regulator and drain condition	Visual and audible check; gauge reading	Per OEM manual and site air-system practice	Operator or technician	Required before opening or removing components; includes releasing stored air	No audible leaks; filter bowl and drains in the condition the manual specifies	Leaks logged with location
Sensors and photo-eyes	Check cleanliness, alignment and function	Clean lens; test with a known target	Per OEM manual; shorter where failure history shows contamination	Operator or technician	Not required for external cleaning if the procedure allows; check the risk assessment	Detects the test target reliably	Result noted
Guards, interlocks and e-stops	Verify the safety function operates as intended	Functional test by the procedure approved by safety personnel	Per site risk assessment and OEM manual	Qualified personnel	Per site procedure	Safety function stops the machine as the validated design requires	Test result and tester signed
Filling or dosing parts	Inspect product-contact parts for wear, build-up and seal condition	Visual; compare with reference	Per OEM manual; shorter where product is abrasive or sticky	Operator or technician	Required before removing parts	Parts intact and clean; seals show no cracking	Parts replaced and logged

Add rows from your own failure history, even where the manual treats the item as an operator cleaning task.

Write each acceptance criterion so that two people would judge it the same way. “Looks OK” does not qualify. A reference sample, a gauge reading or a photo can.

Energy isolation and safety

The “Energy isolation (LOTO)” column puts that decision where the technician sees it. Fill it from the risk assessment and the site’s procedures, not from memory. For each task it should say whether isolation is needed, which energy sources are involved (electrical, pneumatic, hydraulic, thermal, gravity or stored spring energy), and which procedure applies. Some tasks, such as lens cleaning from a safe position or a visual check from outside the guarded area, may not need isolation, but the risk assessment decides that, not convenience.

Safety function checks on guards, interlocks and emergency stops belong on the list. Safety personnel and the supplier’s instructions set the method and who performs them.

From task list to schedule

Once tasks are written, group them by what triggers them.

• Shift: daily operator checks such as cleanliness, leaks and abnormal noise.
• Calendar: weekly or monthly tasks tied to time passing, such as lubrication or inspection.
• Operating hours: tasks tied to running time, read from the machine’s hour meter.
• Counts: tasks tied to cycles, packs or knife strokes, where wear follows output.

The “Interval basis” column records which trigger applies and where it came from. Counts and hours follow wear better than the calendar when output varies by shift. The values come from the OEM manual and the risk assessment. Do not copy intervals from a different machine or an unrelated source, even one that looks similar.

A schedule becomes preventive maintenance only when someone is assigned, time is allowed and the machine is released. Typical gaps are tasks that need a stop production never grants, tasks given to untrained operators, and tools or consumables that are not staged.

Coordinating with the production schedule and with format changeovers often helps more than adding tasks. Some changeover steps already involve cleaning and inspection that can double as maintenance checks.

Records and the review loop

Records are what let you improve the list. Each completed task should leave evidence that fits its type: a tick for a simple check, a measured value for a gauge reading, a work order for a replacement. Where the criterion is a measurement, record the value, not only pass or fail, so you can see drift.

Review the list on a set cycle and after any significant failure. Ask:

1. Which failures happened since the last review, and did a task cover that component? If not, add one. If so, why did the task miss it: wrong method, wrong interval basis, or a criterion that was too loose?
2. Which tasks found nothing over a long period? Check whether the interval basis is still right, starting with the manual and the risk assessment. Some tasks, such as safety function checks, matter even when they rarely find anything.
3. Which tasks regularly find problems? A repeated finding can mean the interval needs review, or that the root cause sits elsewhere, such as material quality or a setting.
4. Which spares were used, and are the critical ones still stocked?

Tie failure analysis back to the checklist. When a seal fault repeats, the seal defect investigation guide helps separate maintenance causes from material, product and setting causes, so the checklist is not blamed or credited for faults it cannot affect.

Maintenance staff should not carry this alone, since production, quality and the supplier each hold part of the picture. Some plants use autonomous maintenance from total productive maintenance literature, where operators take on basic cleaning and inspection. Whether that suits your site depends on training and on what the risk assessment permits.

Connect to line performance

Maintenance effort pays off most at machines whose stops limit the line. The bottleneck analysis guide shows how to find the machine whose lost time matters most. Spare-part stock, task depth and inspection frequency can then be weighed against the cost of downtime at that machine instead of being spread evenly. KPI definitions such as OEE are covered in ISO 22400-2.

Servo and pneumatic axes call for different checks, as the guide on servo versus pneumatic actuation explains. The maintenance load is also part of the total cost of ownership and belongs in the purchase decision.

Information to request from suppliers

• The maintenance manual in the revision matching the machine, with the basis for each interval.
• A list of recommended spares, split into wear parts, critical spares and those suited to a longer-term holding.
• Lubricant and consumable specifications, including food-contact suitability where relevant.
• Procedures for energy isolation and any stored-energy points specific to the machine.
• Which tasks the supplier expects operators to do and which need supplier or trained technician service.
• Training offered for maintenance staff and the expected response for service and parts.

Checklist before you release a maintenance plan

• Current OEM manual collected for every machine and major bought-in component.
• Failure and short-stop history reviewed per machine.
• Site risk assessment applied to each task, and isolation requirements entered in the LOTO column.
• Critical spares identified and stock decisions made.
• Every task has a method, an interval basis and a measurable acceptance criterion.
• Skill level and training confirmed for each task.
• Schedule agreed with production and with changeover planning.
• Record format agreed, with a named owner for the review cycle.
• Review date set, and triggers for early review defined, such as a major failure.

Limits and on-site verification

This guide gives a structure, not a plan. It cannot say which tasks a given machine needs, how often, with which tools, or under which isolation steps. Those come from the OEM manual, the risk assessment, and the people who know your site.

Verify the list at the machine. Walk through each task with the person who will do it, with the machine in a safe state, and confirm that the access, the method and the criterion work in practice. Treat the first version as provisional and expect to correct it over the first few review cycles. Qualified personnel should review the safety-related content, including isolation steps and safety function tests, under your own procedures.