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Subject Topic: Squealing brakes Post Reply Post New Topic
PersonTersane
28/6/2015 at 11:10am
 Location: Newport Pagnell Buckinghamshire
 Outfit: Hyundai Matrix - Abbey Iona + awning View Tersane's Profile View Profile   Reply to Tersane Reply   Quote Tersane Quote  
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We have an Abbey Iona of 1995 vintage and have noticed when braking at the end of a journey, on local roads, the 'van brakes squeal when stopping. Our service man checked them out and found nothing untoward with them. Many years ago, when cars had brake shoes rather than pads, a squeal from them was cured by stomping on the pedal a few times to 'bed them in'. I am rather reluctant to try that when towing, for all sorts of reasons. Any suggestions?


Personbilly
28/6/2015 at 11:49am
 Location: North Essex
 Outfit: Caravelair Alba 400 View billy's Profile View Profile   Reply to billy Reply   Quote billy Quote  
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Often its brake dust in the drums. Did your bloke remove drums, clean out and reajust? If he did then nothing really else you can do.


PersonGCMS2012
28/6/2015 at 11:58am
 Location: Northumberland
 Outfit: Knaus Sudwind 550 TK View GCMS2012's Profile View Profile   Reply to GCMS2012 Reply   Quote GCMS2012 Quote  
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Could the shoes be 'glazed' too??

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Damned if I do...

Damned if I don't!!!!


Personmagicgrotto
28/6/2015 at 11:59am
 Location: Doncaster
 Outfit: Disco1 300tdi 1990 ABBEY STAFFORD View magicgrotto's Profile View Profile   Reply to magicgrotto Reply   Quote magicgrotto Quote  
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Let's you know they are working !

 leading edge may be worn !

 Steve & Ange



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Jack of all trades master of none !!!!


Persontango55
28/6/2015 at 12:31pm
 Location: Lichfield
 Outfit: Coachman Amara 450 View tango55's Profile View Profile   Reply to tango55 Reply   Quote tango55 Quote  
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When you get a glass and rub your finger around the rim there is grip between the finger and glass but if you dip your finger in water and do the same then a high pitch squeal will be evident. This is because there is no grip and squealing brakes are acting in exactly the same manner. If the brake drums were thoroughly brushed out then the problem is that the brake shoe surfaces have glazed which result is poor grip causing the squeal.
Your service man obviously found nothing wrong which is right because a lot of modern teachings these days are based on computerised technology and basic visible inspections but this is down to years of mechanical engineering experience.
The solution is to take off the brake adjustment, removed the drums and then clean the brake surfaces with some fine sandpaper. However, the rubbing action should be opposite the grain so basically it's rubbing the shoes from front to back with sandpaper on the end of a file to maintain the straightness. When finished make sure you thoroughly clean out any remaining dust, refit the brake drums and finally adjust the brake shoes.


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PersonTersane
28/6/2015 at 6:04pm
 Location: Newport Pagnell Buckinghamshire
 Outfit: Hyundai Matrix - Abbey Iona + awning View Tersane's Profile View Profile   Reply to Tersane Reply   Quote Tersane Quote  
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The answer does seem to be removing glaze from the shoes. The only problem seems to be replacing the 'one shot' Alko hub nut and tightening to the required torque setting. My wrench only goes to 150 ft lbs. Nowhere near that required.


Persontango55
28/6/2015 at 6:22pm
 Location: Lichfield
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Yes that's correct as a standard torque wrench is inadequate for the job and the specialist tool required is expensive and can cost nearly as much as a service itself.


PersonGCMS2012
28/6/2015 at 9:29pm
 Location: Northumberland
 Outfit: Knaus Sudwind 550 TK View GCMS2012's Profile View Profile   Reply to GCMS2012 Reply   Quote GCMS2012 Quote  
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Expensive torque wrench..???

This is mine

Goes to the 290Nm for the Alko one shot nuts too....

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Damned if I do...

Damned if I don't!!!!



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