A technician carrying out equipment inspection and maintenance on the production line DAILY CHECK · SCHH-2026
Checks that stick: write the care points into the daily inspection sheet
MAINTENANCE KNOWLEDGE

The eight families

The content comes from the front line of plant management and repair, and is written to be concrete: measurement methods, threshold values, interval suggestions and common mistakes — no empty talk.

01

Metal-Cutting Machine Tools

METAL-CUTTING MACHINE TOOLS
Keeping accuracy and maintaining lathes, milling machines, grinders and machining centres. Machine tools are the most expensive patients in a plant — you can afford to treat them, but if you cannot afford to look after them the treatment is wasted.
4 care guidesEnter →
02

Continuous & Chain Conveyor Lines

CONTINUOUS & CHAIN CONVEYOR LINES
When a continuous line stops, everything stops. Care is about spending the shutdown window where it counts and keeping the degradation trends of chains, belts and drives under control.
4 care guidesEnter →
03

Rotating Equipment (Pumps · Fans · Compressors)

ROTATING EQUIPMENT
Pumps, fans and compressors are the most numerous and the most easily mistreated machines in a plant. Their failures share common causes: lubrication, alignment, sealing and suction conditions.
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04

Electrical Control & PLC Systems

ELECTRICAL CONTROL & PLC
Electrical faults are hard to trace, usually because there are no records and no backups. This section is about bringing a control system to the point where a problem can be investigated and a failure can be recovered.
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05

Hydraulic & Pneumatic Systems

HYDRAULIC & PNEUMATIC SYSTEMS
Seventy per cent of hydraulic faults come from oil contamination; eighty per cent of pneumatic faults come from water and particulates. Get the medium right and you have got most of it.
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06

Cranes & Hoisting Equipment

CRANES & HOISTING EQUIPMENT
Lifting equipment involves personal safety, so care standards are stricter than for ordinary plant. Wire rope, brake and limit switches: none of the three can be allowed to slide.
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07

Feed & Biomass Pellet Lines

FEED & BIOMASS PELLET LINES
Both line types share heavy dust, large load swings and frequent plugging. The key to care is controlling the process window and enforcing a cleaning regime.
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08

Wastewater Treatment & Environmental Equipment

WASTEWATER & ENVIRONMENTAL EQUIPMENT
Wastewater plant equipment sits in corrosive media year round, so maintenance intervals have to be recalculated for the environment. The aeration, mixing and dewatering sections hold the most equipment and fail most often.
4 care guidesEnter →

All text in this section was written in-house by the Industrial Equipment Services Division. Thresholds and intervals are field-experience values; in practice follow the equipment manufacturer's technical documents and current national standards. For image-use notes and the disclaimer see Image Use & Disclaimer.

HOW TO USE

How to use these guides

Equipment Care Guides on-site photoFIELD · SCHH-2026
Field photo: Equipment Care Guides
THREE LAYERS

The three-layer structure of equipment maintenance

The material in this knowledge base looks scattered, but all of it falls into these three layers. Working out which layer you are missing is more useful than reading all thirty-odd articles.

How the three layers divide the work - daily inspection catches sudden events, periodic maintenance holds back degradation, and condition monitoring judges remaining life. A plant doing only the first layer leaves failures to luck; a plant running all three sees unplanned downtime fall clearly, and overhaul work can be scheduled into planned windows.
COMMON MISTAKES

The six most common maintenance misconceptions in factories

We see these six again and again in different plants. Correcting them usually costs nothing - only a change of practice.

Misconception one

'More grease can never hurt'

Over-greasing causes churning heat, a greater temperature rise, seals extruded and failed, and old grease carrying wear particles with no way out. Grease quantity is calculated from bearing type and speed, judged by old grease being purged or by the level mark. Too little grease burns a bearing out; too much burns it out just as surely, only more slowly.

Misconception two

'A checklist full of ticks means the check was done'

A checklist without acceptance criteria only proves that someone signed it. The fix is to write every item as a decidable value or condition: temperature limit, oil level band, permissible clearance, a description of abnormal noise, degree of leakage. Only when the team can judge with it, record the judgement and compare records does inspection mean anything.

Misconception three

'Replace the broken part and the job is done'

Replacing the failed part without investigating the cause means the same place keeps failing. Bearing wear can result from misalignment, improper lubrication, seal failure or a sudden load change. We do failure mode analysis and treat the causes along with the damage, aiming for one repair that lasts - and that is the dividing line between 'fixed and broken again' and 'fixed once, running for years'.

Misconception four

'Copy the maintenance intervals from the manufacturer's manual'

The manual gives recommended values for standard duty. A dusty shop versus a clean room, continuous versus intermittent running, the humid south versus the dry north - the sensible interval for the same machine can differ several times over. Correct the interval for the actual site conditions, then verify it with measured data; this is the most valuable step in any maintenance plan.

Misconception five

'For electrical faults, look only at the circuit'

In dusty and damp environments, check the cooling airways and filters before the circuitry. Inverter failures, welded contactor contacts, drive over-temperature alarms - many of them root back to poor cooling and dust build-up. Heat is the silent killer: it raises no alarm, it just shortens component life year after year.

Misconception six

'The equipment history lives in the veteran's head'

When the veteran leaves, the machine's history is cut off: what has been replaced, what parameters were adjusted, where the innate weak points are - nobody knows. One file per machine, a repair history, an accuracy baseline, lubrication cards: these paper records look like a chore, but they are the only way to turn individual experience into organisational capability.

Equipment Care Guides on-site photoFIELD · SCHH-2026
Field photo: Equipment Care Guides
QUICK INDEX

For your type of equipment, look at these first

If you have only one minute, remember the single most important point below for your equipment type. Full details are in the matching category.

MACHINE TOOLS
Metal cutting machine tools: accuracy is everything - check guideway lubrication and spindle condition weekly, and do not wait for out-of-tolerance parts before remembering maintenance
CONVEYOR LINES
Conveyor lines: check the loading points and take-ups first - belt drift and early idler failure usually share one cause
ROTATING EQUIPMENT
Pumps, fans and compressors: alignment and lubrication decide bearing life - measure vibration severity periodically, and the trend is more useful than any single reading
ELECTRICAL & PLC
Electrics and PLCs: check cooling and dust before circuits, back up programmes and parameters without fail, and keep drawings and I/O schedules for every modification
HYDRAULIC & PNEUMATIC
Hydraulics and pneumatics: fluid cleanliness is enemy number one - judge it to ISO 4406, and never economise on filter elements and breathers
CRANES & HOISTS
Cranes and overhead travellers: wire rope, brakes and limit switches inspected periodically per the code - no discounting on safety devices
FEED & PELLET LINES
Feed and pellet lines: die-roller gap, lubricant selection for high temperature and heavy dust, and dust explosion protection - these three are the life-and-death items
WASTEWATER PLANT
Wastewater treatment equipment: recalculate both lubricants and intervals for corrosive duty, and match the sealing and electrical ingress protection to it
ALL EQUIPMENT
The general principle: data before judgement, records before handover, prevention before waiting for failure
Equipment Care Guides on-site photoFIELD · SCHH-2026
Field photo: Equipment Care Guides

Want these care essentials turned into your plant's check sheets?

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