rera brake failure

Brakepads, discs, handbrake. The brakes are crucial for your Volvo 480. Use this category to learn all you need to know!

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robkendall
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rera brake failure

Post by robkendall » Thu Jul 21, 2005 2:33 am

just had the car back to mot station, after removing and stripping/oiling the caliper...its moves plenty and freely
its failed again....theres no effort at all on the rear drivers side!!
theres plenty of meat on the pads, but they look a little shiney....mirrored maybe?
am thinking of roughing the disc up with the grinder to maybe attract a little more friction....aynone done this and found it works?
pads i think are fuct.......dont suppose i would get away with grinding them until i can get new ones?

thoughts please?
rgrds
rob
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pol
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Post by pol » Thu Jul 21, 2005 7:21 am

Perhaps at some point the cylinder has lost fluid and is in need of a bleed. Also I dont know if the adjusters effect the operation of the foot brake as well as handbrake....

Has it failed on normal brakes or parking brake?

pol

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robkendall
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Post by robkendall » Thu Jul 21, 2005 7:14 pm

foot and hand brake no effort on the fail sheet.
i cant get to the adjuster, as the dust cap is pretty much welded in with corrosion.....keep sparying with wd40, and having a go, but have snapped two allen keys so far!!

new pads ordered today anyway.....the discs on the S are on pretty good nick, so ive had em off, ground em a bit, and put them on.....will see if it makes a difference!

at least my mate aint charging me a retest fee until its fixed!!
rgrds
rob
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Murf
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Post by Murf » Thu Jul 21, 2005 7:25 pm

as the dust cap is pretty much welded in with corrosion
ive had this problem in the past, take a torx bit slightly larger than the allen key hole. hammer it in with a big hammer and use a ratchet to take off the dust cap, sounds like overkill but its much needed!

when you buy new ones, cheapish from volvo, put plenty copper grease on the threads to avoid a repeat performance!
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robkendall
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Post by robkendall » Thu Jul 21, 2005 7:31 pm

cheers murf....didnt think of that!
will have a go tomorrow
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deviliShred480
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Post by deviliShred480 » Thu Jul 21, 2005 7:42 pm

abc
Last edited by deviliShred480 on Tue Aug 02, 2005 10:45 pm, edited 1 time in total.

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robkendall
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Post by robkendall » Thu Jul 21, 2005 10:28 pm

deviliShred480 wrote:Rob last year when mine failed on the rear brakes ended up putting new pins and bushes, self lubbing and shouldn't be given extra lubrication, in the rear caliper. Wasn't deperately expensive for genuine Volvo parts. Also cured a problem which seemed to affect several of the 480's at Swaffham last year, not all the pad seems to push up against the disc. Very noticable as there is only a thin area which was shiny on the disc, the rest was rusty.

Think I've also heard of people taking a bastard file to pads to take the glaze of them but not sure if it works.

hi gaz....yeah the idea with the file....ive basically roughed the surface of the disc with my grinder.....im a lazy bastard.
pads wise...the ones in are soooo shiney, i could use em as mirrors......ive ordered new pads now...hopefully wil sort it all out.

cheers guys
rob
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