Essential Autonomous Maintenance Checklist Components

An autonomous maintenance checklist can look complete and still miss the point. Every line has a tick box. Every machine has a sheet. And yet the gearbox still runs dry, the guard bolt still works loose, and the filler still drifts off its setting by the end of the shift.

Usually the problem isn't how many checks are on the list. It's that each check is too vague to do well. "Lubricate chain" doesn't say which points, with what, or how much. "Check bolts" doesn't say which ones or what loose looks like. A good checklist covers the right components, and spells out each one so any trained operator does it the same way.

This guide walks through the six components every autonomous maintenance checklist should cover, what to specify for each, and how to decide between paper and digital. If you're building a checklist from scratch, start with how to build your autonomous maintenance checklist, then use this page to fill in each line. New to autonomous maintenance? Start with what it is and the three activities it runs on.

The six components at a glance

1. Cleaning

In autonomous maintenance, cleaning is inspection. The point of wiping down a machine isn't how it looks. It's that a clean surface shows the oil weep, the hairline crack or the worn belt that grime was hiding.

For each cleaning check, specify the exact area, the method, the tools and any cleaning agents, and whether the machine must be locked out first. Be specific about materials: some solvents damage seals, painted guards or electrical components, and compressed air can push contaminants into bearings.

In food and beverage plants, keep AM cleaning separate from sanitation. Sanitation follows your SSOPs and master sanitation schedule and is verified by QA. AM cleaning is the operator's routine wipe-down and inspection of their own equipment. Mixing the two on one form muddies both records.

2. Inspection

Inspection checks are where operators catch deterioration early. Each one should name the component and give a clear pass/fail standard, not just "inspect."

Organize inspection by sense and by system. Operators look for leaks, cracks and wear, listen for grinding or knocking, feel for heat and vibration where it's safe, and notice unusual smells. By system, most checklists cover drives, pneumatics, hydraulics, fasteners, lubrication and electrics (look, don't touch). Operators learn each system in step 4 of autonomous maintenance, so the checklist should match what they've been trained on.

3. Lubrication

Lubrication is the component most often done wrong, because too much is as harmful as too little. Over-greasing blows out seals and overheats bearings; under-greasing wears them out. The checklist has to remove the guesswork.

Start with a lubrication map for each machine: a photo or drawing with every point numbered, and for each point the lubricant, the amount, the frequency and the method.

The example is illustrative; take lubricants, amounts and intervals from manufacturer specs.

A few practices make lubrication checks reliable. Colour-code each lube point to match its lubricant container and grease gun, so the wrong product never goes in. Specify pumps from a marked gun rather than "apply grease." For points that are hard to reach or need frequent small doses, consider automatic lubricators, which leave the operator a check (is it working, is it empty) instead of a task. Some plants also use ultrasound to grease bearings until they sound right, though that's usually a technician task.

4. Tightening

Loose fasteners cause misalignment, vibration and eventually failure, and they're easy for operators to catch if the checklist makes it visual.

The simplest method is match marks: after a technician torques a critical bolt to spec, they paint a line across the bolt head and the surface. The operator's check is then a glance: are all the marks still lined up? No tools, no judgement call.

List which fasteners operators check (guards, motor mounts, couplings, conveyor frames) and which they're approved to tighten. Torquing critical fasteners usually stays with maintenance. And log every loose bolt: the same bolt coming loose week after week points to a vibration or alignment problem worth a root cause investigation.

5. Centerlines

Centerlines are the target settings, with upper and lower limits, for the variables that matter most: pressure, temperature, speed, fill weight. A centerline check asks the operator to record the actual value, not just tick "OK." A reading creeping toward its limit is the early warning; a tick box hides it.

Keep centerline checks to the 5 to 20 variables with the biggest effect on the product and the equipment. Mark the target range directly on gauges in green so the check takes seconds.

6. Abnormality reporting

Every checklist should end with one more question: is anything else not normal? Operators often notice things no checklist line covers, like a new rattle, a damp patch on the floor or a sensor that's been triggering late. Give them a quick way to report it with a photo, and make sure the report reaches someone who will act on it.

What every checklist line needs

Whatever the component, each line on the checklist should carry the same supporting information:

• A reference photo of the check point, ideally with the target state marked.
• A clear pass standard or target range.
• The time it should take, so the whole checklist fits inside the shift.
• The safety requirement: lockout or not, and any PPE.
• A link to the One Point Lesson for anyone doing it for the first time.

Paper, PDF or digital?

A printed checklist or PDF is a reasonable place to start, especially on a pilot line. Our free CIL checklist template is built for exactly that.

Paper's limits show up as soon as you scale. Readings don't get trended, failed checks wait for someone to read the sheet, photos are impossible, and every standard change means reprinting every copy. Most plants move to digital checklists once the program proves itself on the pilot line.

How Weever helps

In Weever, each component becomes a check with its own reference photo, target range and time, running on a schedule by shift, day or week. Centerline readings are recorded and trended, failed checks and abnormalities route to maintenance with photos attached, and a change to a standard is live on every line at once.

Monin, a flavoured syrup manufacturer we worked with, had operators completing equipment inspection and cleaning checks on paper before every production run, then routing them to quality by hand. Digitizing those checks saved 3 to 4 hours a day, and Monin rolled Weever out to all of its North American facilities within 5 months.