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Smart Reasoning:

C&E

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Qaagi - Book of Why

Causes

Effects

issuehad been causingCV / shaft / cage failure

Misalignment between the engine and gearboxcan causerelease bearing failure

several factors(passive) can be caused byBearing Failure Bearing failures

These conditionscan leadto premature cage failure

It is easyto causebearing seal failure

insufficient lubrication , incorrect lubricant , misalignment , excessive vibration , shaft overload and overheating(passive) caused byBearing failure

by improper lubrication and excessive bearing pre - load(passive) caused bybearing failure

Lack of lubrication , dirty oil , misalignment , and imbalance ... factorscan contributeto bearing failure

Vibration ... the major causes of bearing wearwill ... leadto bearing failure

Electrical currents can flow through the bearing causing electrical arcing damage to the rolling contact surfacesultimately leadingto bearing failure

2 bearing assembly with clearance fit properly ... likelyto causebearing failure

There has never been a mechanical seal failure alsomight had contributedto bearing failure

damage ... excessive bearing noisewill ... causebearing failure

loss of lubricant from the bearing ... dry - running operationcan causebearing failure

bearing material or manufacturing problems(passive) is ... caused byBearing failure

by oil pump failure(passive) was caused bybearing failure

a lot by stray shaft currents induced by VFD 's that discharge through the motor bearings , resulting in fluting on the bearing(passive) is causedBearing failure

the oil or lack of it ... those bearingsleadsto bearing failure

Lack of Oil service schedule ... issuesleadto bearing failure

by a lack of lubrication since the failed bearing showed signs of lube oil starvation(passive) was caused bybearing failure

by lubricant contamination or loss of oil(passive) caused bybearing failure

Typical wheel separation is caused by wheel seal failurecausingbearing failure

Typical wheel separation is caused by wheel seal failurecausingbearing failure

Clearance of the bearing inner ring and shaft of interference , andcan ... causebearing failure

by insufficient bearing lubrication(passive) caused bybearing failure

change the material structure of the steelultimately leadingto bearing failure

the gearbox bearings ... increased friction / lack of lubricating fluidwould ... leadto bearing failure

The resulting lubrication breakdown and mechanical wearultimately leadto bearing failure

vibration and lateral movement of the bearingcan ... leadto bearing failure

However improper or / and poor lubrication with difficult operating conditionscan leadto bearing failure

engine lubrication oilwill causebearing failure

THE RELATIONSHIP BETWEEN CONTACT MECHANICS AND LUBRICATION Excessive contact stress or deformationcan leadto bearing failure

a lot by stray shaft currents induced by VFD 's that discharge through the motor bearings(passive) is causedBearing failure

techniques and processes that can cause surface cracks and damage or improper geometry ... preset components Improper profile , internal geometry , finishes and clearance settingscan causebearing failure

any lubrication ... grease and oilleadto bearing failure

by a bad bearing or bad bearing seal(passive) caused bybearing failure

excessive bearing noisewill ... causebearing failure

by lack of oil(passive) caused by Bearing failure

Frequently a result of bearing contaminationcan leadbearing failure

Failure to have this cold end play amountwill causebearing failure

engine fault SYDNEYcausedengine fault SYDNEY

in noiseresultingin noise

to oil getting into the transledto oil getting into the trans

in other damage such as shaft gallingcan resultin other damage such as shaft galling

the wheel to separate from the vehicle or loss of steering controlcan causethe wheel to separate from the vehicle or loss of steering control

the wheel to separate from the vehicle or loss of steering controlcan causethe wheel to separate from the vehicle or loss of steering control

end play in crankshaft resulting in oil seal failurecausingend play in crankshaft resulting in oil seal failure

to complete machine failurecan leadto complete machine failure

lengthy unplanned downtime and potentially damage a machinecan causelengthy unplanned downtime and potentially damage a machine

to an investigation into the failure finding that water in the lubricating oil led to increased bearing friction and premature failurewould often leadto an investigation into the failure finding that water in the lubricating oil led to increased bearing friction and premature failure

to loss of oil pressure and ultimately oil pump seizureledto loss of oil pressure and ultimately oil pump seizure

13 % of motor failures and bearing wear causes more than 60 % of the mechanical failures in a facilitycauses13 % of motor failures and bearing wear causes more than 60 % of the mechanical failures in a facility

to fairly radical amendmentledto fairly radical amendment

to electrical failureleadsto electrical failure

in damage similar to thatresultingin damage similar to that

that seal failure(passive) was mostly caused bythat seal failure

to seal failureleadsto seal failure

belt failuremay ... causebelt failure

significant productioncausingsignificant production

to catastrophic engine shut - downledto catastrophic engine shut - down

to unplanned downtime and production interruptioncan leadto unplanned downtime and production interruption

a critical machine to seize and stop productionmay causea critical machine to seize and stop production

to the overall collapse of the entire bridgewill leadto the overall collapse of the entire bridge

to engine seizuremay leadto engine seizure

loss of timing and piston / valve interferencewill causeloss of timing and piston / valve interference

damages of other componentscan causedamages of other components

extensive damage to other engine componentscan causeextensive damage to other engine components

belt failure when drag becomes excessivemay ... causebelt failure when drag becomes excessive

those issuescausedthose issues

the problemcausedthe problem

alsowas ... causingalso

a crashcould causea crash

wheel separationcan causewheel separation

THE VEHICLE TO STALL INCREASING THE RISK OF A CRASHCOULD CAUSETHE VEHICLE TO STALL INCREASING THE RISK OF A CRASH

13 % of motor failures(passive) are caused by13 % of motor failures

13 % of motor failurescauses13 % of motor failures

from white structure and other debris - related damage providing superior wear and smear resistanceresultsfrom white structure and other debris - related damage providing superior wear and smear resistance

the twocan causethe two

a short block replacementcauseda short block replacement

from these conditionsresultsfrom these conditions

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Smart Reasoning:

C&E

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