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What Causes Repeated Machine Failures? How to Stop Recurring Breakdowns
Updated: 14 hours ago
Is the same machine breaking down repeatedly? Are your engineers replacing the same components, resetting the same faults or constantly responding to breakdowns on the same production line?
Repeated machine failures are a common frustration for manufacturing businesses. They lead to lost production, increased maintenance costs, unnecessary component replacements and additional pressure on engineering teams.
The problem is that repairing a failed component doesn't always resolve the underlying cause.
At MechElecPro Solutions Ltd, we understand the importance of identifying why industrial machinery continues to fail, rather than simply getting equipment running again until the next breakdown.
In this guide, we explain the most common causes of repeated machine failures, how to investigate recurring breakdowns and what manufacturers can do to improve equipment reliability.
What Causes Repeated Machine Failures in Manufacturing?
Repeated machine failures usually occur when the underlying cause of a breakdown has not been identified or permanently corrected.
Although replacing a damaged component may restore production temporarily, the same problem can return if the conditions responsible for the failure remain unchanged.
Common causes include:
Inadequate preventative maintenance
Mechanical wear, misalignment and vibration
Electrical faults and damaged components
PLC programming and automation problems
Incorrect lubrication or contamination
Equipment operating beyond its intended capacity
Temporary repairs becoming permanent solutions
Poor maintenance records and communication
Understanding these issues is essential for reducing unplanned downtime.
1. Poor Preventative Maintenance
One of the leading contributors to repeated machine failures is insufficient planned maintenance.
When production demands increase, maintenance tasks are often postponed to keep machinery operating.
Unfortunately, delaying essential inspections can allow relatively minor problems to develop into serious equipment failures.
For example, a conveyor bearing showing early signs of wear may continue operating for several weeks before eventually seizing and stopping production.
How to prevent it:
Introduce a structured planned preventative maintenance (PPM) schedule.
Inspect critical components regularly.
Monitor vibration, temperature and unusual noises.
Replace worn components before failure where justified.
Review maintenance intervals based on actual machine conditions.
Effective planned preventative maintenance can help manufacturers reduce unexpected breakdowns and improve equipment reliability.
2. Mechanical Wear and Misalignment
Mechanical problems are another major cause of recurring industrial machinery breakdowns.
Bearings, shafts, belts, chains, couplings and gearboxes operate under continuous mechanical stress.
If components are incorrectly aligned, overloaded or poorly maintained, they may wear prematurely.
For example, repeatedly replacing a conveyor bearing without correcting shaft misalignment may result in the replacement bearing failing for exactly the same reason.
How to prevent it:
Check shaft and coupling alignment.
Inspect conveyor tracking and belt tension.
Monitor bearing temperatures and vibration.
Investigate excessive mechanical loads.
Check supporting structures and mounting points.
A thorough mechanical inspection can often identify problems that would otherwise continue causing breakdowns.
3. Electrical Faults and Intermittent Problems
Electrical issues can be particularly difficult to diagnose because faults may appear intermittently.
A machine might operate normally for several hours before unexpectedly tripping or stopping.
Common electrical problems include:
Loose or deteriorating electrical connections
Damaged cables and wiring
Failing contactors and relays
Motor overload conditions
Faulty sensors and proximity switches
Unstable control power supplies
Moisture or contamination inside electrical enclosures
Repeatedly resetting a machine or replacing electrical components without investigating the fault can allow the problem to continue.
How to prevent it:
Qualified engineers should carry out systematic electrical fault finding, checking the electrical supply, control circuits, motor loading and relevant machine components.
Testing should be carried out using appropriate isolation procedures and safe electrical working practices.
Identifying the actual electrical fault can prevent unnecessary component replacement and repeated production interruptions.
4. PLC Programming and Automation Problems
Modern manufacturing equipment relies heavily on PLCs, sensors, variable-speed drives and automated control systems.
When these systems develop faults, production equipment can experience unexpected stoppages, incorrect sequences or intermittent operating problems.
Common issues include:
Faulty PLC input or output signals
Incorrect sensor positioning
Damaged field wiring
Poorly configured timers or control sequences
Communication faults between devices
Obsolete automation components
Undocumented programme modifications
However, not every machine stoppage is caused by a PLC programming problem.
Sometimes the PLC is correctly identifying a mechanical or electrical fault elsewhere in the machine.
How to prevent it:
A systematic automation investigation should include reviewing PLC diagnostics, checking field signals, verifying operating sequences and identifying any changes to the machine's original operation.
Where appropriate, targeted PLC upgrades and programming improvements can provide better fault diagnostics and improve machine reliability.
5. Incorrect Lubrication and Contamination
Lubrication plays an important role in protecting mechanical components.
Insufficient lubrication, incorrect lubricant selection and contamination can all accelerate wear.
Over-lubrication can also create problems, particularly where excess grease damages seals or increases operating temperatures.
Contamination from dust, moisture, chemicals or production materials can affect bearings, gearboxes, pneumatic systems and electrical equipment.
How to prevent it:
Follow manufacturer lubrication recommendations.
Use the correct lubricant and quantity.
Inspect seals and protective covers.
Monitor lubricant condition where appropriate.
Protect equipment from moisture and contamination.
Review lubrication practices following repeated component failures.
Correct lubrication and environmental protection can significantly improve component service life.
6. Machines Operating Beyond Their Intended Capacity
Manufacturing equipment is often required to operate at higher speeds, for longer periods or with different products than originally intended.
Although these changes may increase production output, they can also place additional stress on mechanical and electrical components.
For example, increasing conveyor throughput may create additional loading on motors, gearboxes and drive systems.
Similarly, changing product dimensions on packaging equipment without reviewing machine settings may result in repeated jams and stoppages.
How to prevent it:
Review machine operating conditions whenever production requirements change.
Check whether the equipment is suitable for the new duty and whether modifications, adjustments or engineering improvements are required.
7. Temporary Repairs That Never Address the Root Cause
When a production line stops, restoring operation quickly is understandably a priority.
However, temporary repairs can become a recurring problem when they are not followed by a permanent corrective action.
Examples include:
Repeatedly replacing the same failed sensor
Adjusting conveyor tracking without investigating the cause
Resetting recurring motor overload faults
Replacing bearings without checking alignment
Clearing machine jams without examining why they occur
A temporary repair may be necessary to restore production safely, but it should be recorded and followed by a proper investigation.
The objective should always be to eliminate the cause of the failure, not simply restore operation until the next breakdown.
How to Stop Repeated Machine Failures
Preventing recurring breakdowns requires a structured approach to fault finding and maintenance.
Step 1 - Review Previous Breakdown Records
Examine maintenance history, previous repairs, replaced components and recorded fault messages.
Look for patterns involving particular machines, shifts, operating conditions or production processes.
Step 2 - Carry Out Root Cause Analysis
Rather than focusing only on the failed component, investigate why the component failed.
Methods such as the 5 Whys and cause-and-effect analysis can help identify contributing factors.
For example:
A conveyor repeatedly trips on overload.
The motor is drawing excessive current.
Investigation identifies increased mechanical resistance caused by a seized roller.
Replacing or repairing the roller and checking the remaining conveyor components addresses the underlying mechanical problem rather than repeatedly resetting the motor protection.
Step 3 - Implement Permanent Corrective Actions
Once the root cause has been established, introduce an appropriate repair or engineering improvement.
This may involve replacing damaged components, correcting alignment, improving lubrication, modifying equipment or upgrading an ageing control system.
Step 4 - Improve Planned Maintenance
Use the investigation findings to improve inspection schedules, maintenance procedures and component replacement strategies.
Step 5 - Monitor Equipment Performance
Following repairs, monitor the machine under normal production conditions.
Confirm that the original fault has been resolved and that corrective actions have not introduced additional problems.
The Cost of Repeated Machine Breakdowns
Repeated machine failures can cost manufacturers considerably more than the price of replacement components.
The wider impact can include:
Lost production output and missed targets
Increased engineering labour and overtime
Emergency repair and call-out costs
Wasted materials and rejected products
Delayed customer orders
Reduced overall equipment effectiveness (OEE)
Increased pressure on maintenance personnel
Even relatively short breakdowns can become expensive when they occur repeatedly throughout the working week.
For example, a machine experiencing three 30-minute breakdowns every week loses approximately 78 production hours annually, assuming 52 operating weeks.
That represents almost two full 40-hour working weeks of lost production time on a single machine.
When Should You Bring in External Engineering Support?
Internal maintenance teams are often under pressure to manage breakdowns, planned servicing, improvement projects and daily production requirements.
When the same machine continues to fail, additional engineering support can help identify underlying problems while allowing the existing maintenance team to focus on other essential tasks.
External support can be particularly valuable when:
The same machine repeatedly breaks down.
Internal engineers have exhausted normal fault-finding options.
Electrical or PLC expertise is required.
Maintenance backlogs are increasing.
Production downtime is becoming unacceptable.
Additional engineering resources are required for repairs or improvement projects.
How MechElecPro Solutions Can Help Reduce Machine Failures
At MechElecPro Solutions Ltd, we provide mechanical, electrical and automation engineering support to manufacturing businesses across the UK.
With over 17 years of engineering industry experience behind the business, we understand the importance of practical fault finding, reliable repairs and keeping production equipment operating efficiently.
Our engineering services include:
Industrial breakdown assistance diagnosing faults and restoring machinery to operation.
Mechanical and electrical fault finding identifying the underlying causes of repeated failures.
PLC programming and automation support investigating control faults and improving machine operation.
Industrial machine servicing maintaining equipment and identifying developing problems.
Planned preventative maintenance helping reduce unexpected failures.
Engineering shift cover providing experienced engineers to support busy maintenance teams.
Engineering improvements and upgrades addressing recurring equipment problems and improving reliability.
Whether your business is experiencing repeated conveyor failures, intermittent electrical faults, packaging machinery breakdowns or ongoing maintenance challenges, our engineers can provide practical support.
Stop Repeated Machine Failures Before They Cost You More
Repeated machine failures should not be accepted as a normal part of manufacturing.
Although occasional breakdowns are unavoidable, recurring faults often indicate underlying problems that require further investigation.
By combining effective maintenance, structured fault finding and appropriate engineering improvements, manufacturers can reduce unexpected downtime and improve long-term equipment reliability.
Need Help With Repeated Machine Failures?
If your production equipment keeps breaking down, MechElecPro Solutions Ltd can help investigate recurring faults and identify practical solutions.
Whether you require emergency breakdown assistance, planned machine servicing, PLC fault finding or additional engineering support, we're here to help keep your operations moving.
Contact MechElecPro Solutions Ltd today.
Telephone: 01788 624762
Website: www.mechelecprosolutions.com
Reliable Engineering Support. Reduced Downtime. Improved Performance.
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