Brake caliper piston won't go in
#1
Brake caliper piston won't go in
I attempted to do the rear pads on our CM yesterday and had a first...the piston wouldn't go in. All the others I've done I just had to crank in by hand using the Harbor Freight brake tool. This one I was using a big wrench over the handle for extra leverage and even then I only got it in about 1/2 way. I had to reassemble with the old pads. This was with the bleeder open after initially attempting with it closed (which is how I've done all the others). I didn't have any issue when I did the fronts a few months ago.
One interesting thing...I didn't get any fluid coming out of the bleeder.
Any ideas before I either take it to The Man or get a new caliper?
One interesting thing...I didn't get any fluid coming out of the bleeder.
Any ideas before I either take it to The Man or get a new caliper?
#3
#5
#6
You need to turn the piston clockwise to compress it back into the caliper. Only way to get the rears to retract--it is the parking brake. The parking brake screws the piston in --ratchet action to activate the piston.
Your tool is the same as the ECS tool. 1-Attach it to the piston with the proper adapter 2-turn the piston with the tool clockwise 3-use a wrench (or simply by hand ) turn the hex portion counter clockwise to keep it in contact with the outer caliper 4-repeat until the piston is fully retracted. Sometimes it a little difficult to turn the tool handle if the piston is in bad shape.
Yes--to open the bleeder screw.
Your tool is the same as the ECS tool. 1-Attach it to the piston with the proper adapter 2-turn the piston with the tool clockwise 3-use a wrench (or simply by hand ) turn the hex portion counter clockwise to keep it in contact with the outer caliper 4-repeat until the piston is fully retracted. Sometimes it a little difficult to turn the tool handle if the piston is in bad shape.
Yes--to open the bleeder screw.
#7
Trending Topics
#9
#10
Well I figured it out but hosed up the caliper boot while figuring all this out and now it's leaking. I probably should just buy a remanufactured one instead of trying to replace the boot. I'm surprised these are only $60.
https://www.rockauto.com/catalog/x,c...,parttype,1704
The key thing I missed is that it retracts while turning. I thought it needed to be allowed to turn while being pushed in. The Harbor Freight brake tool I have was missing anything that kept the end piece in alignment with the handle, so there was no turning happening. A small screw in the alignment hole fixed that.
Also, the pads that AutoZone sold me are entirely too small...I'd guess only 2/3 the surface area of the OEMs. Any suggestions for pads?
https://www.rockauto.com/catalog/x,c...,parttype,1704
The key thing I missed is that it retracts while turning. I thought it needed to be allowed to turn while being pushed in. The Harbor Freight brake tool I have was missing anything that kept the end piece in alignment with the handle, so there was no turning happening. A small screw in the alignment hole fixed that.
Also, the pads that AutoZone sold me are entirely too small...I'd guess only 2/3 the surface area of the OEMs. Any suggestions for pads?
#11
Thread
Thread Starter
Forum
Replies
Last Post
squawSkiBum
Tires, Wheels, & Brakes
26
03-18-2024 07:21 AM
igzekyativ
MINIs & Minis for Sale
34
07-16-2020 12:54 PM