Volvo RWD 140-160 Forum

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stuck brake caliper 140-160

posted by  bluePV544 on  Thu Jul 31 12:22 CST 2008
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last visit: Sun Dec 15 19:44 CST 2013
[RELATED]

Hello all, The pistons in both rear calipers are stuck. I did my research in the brickboard archives. I soaked them in PB Blaster and removed the snap rings. The seals fell apart. I used compressed air but they did not budge. What else can I do short of explosives? When I do get them out, will I be able to reuse them? The car has sat for ten plus years. Thanks.
--
Bob, NC, 1965 PV544, 1972 142, 1988 240 wagon








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    stuck brake caliper 140-160

    posted by  Trev29 on  Fri Aug 1 01:26 CST 2008
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    last visit: Fri Oct 17 05:56 CST 2014
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    You have an '88 240. Are the rear calipers the same as your 142? If so, pull a pair off a 240 at a PickNPull.
    --
    1980 245 Canadian B21A with SU carb but electronic ignition and M46 trans in Brampton, Ont.








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    stuck brake caliper 140-160

    posted by  walrus3 on  Thu Jul 31 15:02 CST 2008
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    last visit: Mon Dec 2 14:20 CST 2013
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    A brake system puts up several hundred psi, maybe a thousand, so compressed
    air (which stores energy) is a dangerous and ineffective way to get them out if
    they are stuck. You might "bench bleed" them with some kind of penetrating oil
    or even kerosene and then hook them back up and use the brake system to push
    them out. Or a porta-power pump would do a great job. Hydraulic jack oil has
    good penetrating qualities also. Put a spacer between the pistons because once
    one comes completely out you lose all the pressure, so you want to push them all
    MOST of the way out before any come ALL the way out. And if you can push them in
    and then pressure them out several times, you might even restore workability.
    They are amazingly tolerant of maltreatment!
    --
    George Downs, Bartlesville, Heart of the USA!








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      stuck brake caliper 140-160

      posted by  bluePV544 on  Sun Aug 3 13:45 CST 2008
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      last visit: Sun Dec 15 19:44 CST 2013
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      Progress report: I installed the calipers and they finally got them to move. They came close to the rotor but not all the way out. Even if I can save them, I would have been better off replacing them. However you get to the point where you don't want throw away all the time you have invested.
      --
      Bob, NC, 1965 PV544, 1972 142, 1988 240 wagon








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        stuck brake caliper 140-160

        posted by  bluePV544 on  Mon Aug 4 22:32 CST 2008
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        last visit: Sun Dec 15 19:44 CST 2013
        [RELATED]

        I have raised the white flag over my calipers. After more soaking they would not compress nor would they expand any further. I tried the grease gun. There was lots of pressure but no movement. I have already ordered a loaded replacement pair. If anyone is in need of seals, pads and hardware for Girling calipers, contact me through email. Thanks for your help.
        --
        Bob, NC, 1965 PV544, 1972 142, 1988 240 wagon








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    stuck brake caliper 140-160

    posted by  Volvo From Heck on  Thu Jul 31 14:56 CST 2008
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    last visit: Mon Oct 13 20:56 CST 2014
    [RELATED]

    While air pressure will most often get caliper pistons out (watch where you keep your fingers--don't ask how I know this) it can come out like rocket--for the really stubborn pistons try installing a grease fitting and use a grease gun--there's a lot more pressure there than you would imagine.







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