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RWD - brakes start to activate on their own

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brakes start to activate on their own 700 1990

I have a very old 1990 Volvo 740 SW Turbo with ABS…
(also called a 2.3L L4 SOHC 8V TURBO).

It generally drives great,
the problem is after driving for 15 mins or so and after things warm up
the brakes start to activate on their own (argh)!
Only slightly at first but gradually more and more firmly until I can’t drive it any more with all the resistance,
tapping the brakes sometimes releases their grip with a snap.


I heard from a local Volvo mechanic that it probably needs 1 of the following,
(I guess I’ll try 1 at a time, probably start with the booster.)

+ Brake Booster - I think it’s this?: https://www.rockauto.com/en/catalog/vol ... oster,1884

+ ABS Hydraulic unit - on device is written Bosch part # 0 265 200 054
I can’t find it in rockauto.com's catalog but should be a fairly common item.
Crazy expensive new so hope to find a used one for $130 or less , gulp.
Might try eBay for my 1st time... I live in California, anyone know where to get one?

(Fwiw, it’s our 2nd car used only to drive within a 5 mile radius a few times a week...
it's nearing it's end of life and at 200k miles not worth a lot of repair investment.)
Thanks for any tips!
Rand

 





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New brakes start to activate on their own [700][1990]
posted by  random  on Mon Jul 30 13:17 CST 2018 >

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