ricky tango Posted March 15, 2011 Share Posted March 15, 2011 bit of a concern really , a few months ago on a pay and play day ( harbour hill, 4x4 without a club ) my mates uncle went down a bomb hole and cam to climb back out when he discovered he couldn't he did take 2 or 3 attempts climbing out (the the hole not too steep a climb but 3-4 ft deep) every time obviously he tried the applied the brake at the top and then lowered back down and eventually reversed out . on inspection when he came out he had sheered the two mounting points for the front drivers calliper , (sheered them off the calliper - the calliper broke not the axle) resulting in the brake line wrapping round the axle as the calliper grabbed the disc and spun round now ive don this hole with the lockers on and i was fine but this weekend my mate father went out in his bobtailed range rover and attempted the same hole and has sheered his calliper bolt hole lugs off of his calliper , are there previous experiences of this , sounds a little concerning to me as they weren't going crazy i would have thought there was more stress on an emergency stop on a motorway which is why i am showing my concern Quote Link to comment Share on other sites More sharing options...
moose Posted March 15, 2011 Share Posted March 15, 2011 I have broken a few calipers on my truck. form a breakage as mild as ripping a bleed nipple/pads off. to having the casting crack open losing all the fluid and separating the what was left of the caliper form the axle. every time I have had breakages it been when i winched/driven through some thing like a deep bog (ie lots of wheel spin). so my thoughts are that some object (root, stone etc..) has got caught between the rim and the caliper and caused the damage. really don't think you can get this sort of damage from braking use as on a motorway. Quote Link to comment Share on other sites More sharing options...
simonr Posted March 15, 2011 Share Posted March 15, 2011 The only breakage like this I've had was down to fatigue. Therefore it definately could happen on the motorway! The same year, I say at least two others break the same way. I suspect off road vehicles will stress the caliper more than on a road going vehicle and make failure more likely. Also, the calipers on off roaders tend to be older than most vehicles regularly used on the road - which again increases the risk. Si Quote Link to comment Share on other sites More sharing options...
leon_81 Posted March 16, 2011 Share Posted March 16, 2011 I managed to break a rear caliper right of its mountings on my Disco - first thing I knew was when the brakes went spongy and i saw fluid dripping - no idea how it happened? Quote Link to comment Share on other sites More sharing options...
JST Posted March 17, 2011 Share Posted March 17, 2011 TC has been known to break calipers on the newer vehicles too! we had one go at work for that cause. Quote Link to comment Share on other sites More sharing options...
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