BRAKES Front caliper won't release...HELP!

BRAKES Front caliper won't release...HELP!

PostBy: McGiever On: Wed Dec 14, 2011 4:26 pm

Greetings,

This trouble started out very slight at first and it soon became extreme.

Got it in my garage and jacked up now and not sure how to proceed.

It's locked up pretty good and before I started disassembling it, I started to wondering how it would come apart being as it is locked on the rotor??? Didn't want to open up the hydraulics and let air be sucked in...that would only add another problem...what else is there to do?

TIA,
McGiever
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: BRAKES Front caliper won't release...HELP!

PostBy: EarthWindandFire On: Wed Dec 14, 2011 4:35 pm

What is the year, make and model of your vehicle?
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75. (sold)
Other Heating: Oil Furnace and Kerosene Heaters.

Re: BRAKES Front caliper won't release...HELP!

PostBy: freetown fred On: Wed Dec 14, 2011 4:59 pm

Double post kinda :lol:
Last edited by freetown fred on Wed Dec 14, 2011 5:02 pm, edited 1 time in total.
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix


Re: BRAKES Front caliper won't release...HELP!

PostBy: freetown fred On: Wed Dec 14, 2011 5:01 pm

freetown fred wrote:Maybe EWF's got a fix for you, but I can't think of anything other then opening that bleeder. Sorry my friend. PS oh the old breaking the bleeder off--PB blast it to tears & that only works 1 out of 10 x's anyway it seems or try the old torches & see what all you can set on fire.--you going to //rebuild or replace--calipers are not that expensive since they've become throw away stuff :( At least not on old Chevy p/ups--don't seem like there are any quick fix's anymore.
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: BRAKES Front caliper won't release...HELP!

PostBy: Freddy On: Wed Dec 14, 2011 5:11 pm

Opening the bleeder probably isn't going to release the stuck pads. Taking your foot off the brake pedal releases the fluid pressure. Just start taking out the bolts that holds it all together. It'll come a point that it should fall apart....at that point, gently tap with the biggest hammer that is needed to make it release. If it's jammed because the pad has come out of it's housing, chances are you need new rotor anyway.
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: BRAKES Front caliper won't release...HELP!

PostBy: coalvet On: Wed Dec 14, 2011 5:19 pm

Most likely the piston is frozen in the caliper, no need to be gentle at this point. Plan on rebuilding the caliper or just replacing it with a new unit.
coalvet
 
Hand Fed Coal Stove: Crane Model 404
Coal Size/Type: Nut
Other Heating: NG Boiler

Re: BRAKES Front caliper won't release...HELP!

PostBy: McGiever On: Wed Dec 14, 2011 6:04 pm

Thanks...It came apart pretty easy...both pads are worn to a slight wedge shape...in opposite directions. Tells me they were both "cocked"...but how did they get that way?

These brake pads were replaced less than 3,000 miles ago. New rotors at that time too.

The linings look pretty crappy...maybe they were defective to start.

I'll check the piston next........

Sure enough, piston frozen. :wtf:
Last edited by McGiever on Wed Dec 14, 2011 6:10 pm, edited 1 time in total.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: BRAKES Front caliper won't release...HELP!

PostBy: freetown fred On: Wed Dec 14, 2011 6:08 pm

Sounds promising so far. :)
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: BRAKES Front caliper won't release...HELP!

PostBy: Sting On: Wed Dec 14, 2011 6:15 pm

replace the pads both front calipers and hoses

hoses will collapse and cause this problem

hang a new set of rotors on while your at it - if the friction overheated the rotors their junk too
Sting
 
Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG

Re: BRAKES Front caliper won't release...HELP!

PostBy: freetown fred On: Wed Dec 14, 2011 7:01 pm

Geeezum, somebody's rollin in the big bucks :shock:
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: BRAKES Front caliper won't release...HELP!

PostBy: WNY On: Wed Dec 14, 2011 7:06 pm

I just did my F150 for the calipers, pads, etc. over the summer..they were known to lock up and drag!! What a difference, I think my mileage went up too!
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
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Re: BRAKES Front caliper won't release...HELP!

PostBy: 009to090 On: Wed Dec 14, 2011 8:28 pm

Sometimes the pistons "Hyper-extend" themselves, and can't be pulled back in. Try using a C clamp to push the piston back in, and test it with new pads in place. I've had several work correctly after that, and after installing new pads. If it still locks in the 'out' position, then you can get it rebuilt, or buy a new caliper.
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Re: BRAKES Front caliper won't release...HELP!

PostBy: Poconoeagle On: Wed Dec 14, 2011 10:43 pm

very common are hoses internally separating and thus they act as a heart valve whereby the fluid is pushed down them applying the brakes yet when released the fluid cant return to the master via the hose as it's trapped due to the flap of rubber restricting the fluid return AND opening the bleeder while the brakes are "stuck" will relieve the pressure and prove this theory.

if then the brakes still didnt free up then the caliper pistons OR the sliding hardware are the next suspects.

if the pads were recently replaced and this syndrome sunsequently followed, I would re-look at the specific work performed...

piston frozen...Just re read that :oops: ... replace both calipers AND hoses.... just because they look good outside dont mean nuthing.

if a piston froze then its probable the fluid was not often changed and thus the hoses internally are also victim to the degrading fluid.... hydroscopic fluid and cast iron calipers and wheelcylinders make rust....oxidation... "es no bueno" 8-)
Poconoeagle
 
Stove/Furnace Make: Buckwalter & Co. , EFM520
Stove/Furnace Model: No. 28 Glenwood 1880, Alaska

Re: BRAKES Front caliper won't release...HELP!

PostBy: SMITTY On: Wed Dec 14, 2011 11:33 pm

Diagonally worn pads are due to lack of maintenance & a "quickie" job by the local mechanic. Nobody takes the time to wire-wheel the crap off the pins & grease the hell out of them. If you do that at every brake job the pads will wear straight as an arrow all the way to the rivets or backing plate. :lol: .... But your not supposed to let them go that far.

These days calipers are so cheap it isn't hardly worth the effort to disassemble them. If it were mine, I would - but I'm a notoriously cheap bastard. :D
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
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Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: BRAKES Front caliper won't release...HELP!

PostBy: memco man On: Wed Dec 14, 2011 11:45 pm

Hi McGiever
The piston seize could be caused by a number of things heat could cause it,if it free after you pull the banjo bolt, and release the pressure then it could be the hose along with several other things, if it has antilock brakes and has not been flushed then it could be in the modulator it could also be in the master cyl., as far as your pads wearing like they did I would say that your slide need to be pulled and lubed with synthtic brake grease just remember that a little bit gose a long ways, you might want to look at your rotors and make sure they they have not V being thicker at the top then the bottom or visea-versa if you have any questions send me a note.
Take Care
Bill
memco man
 
Hand Fed Coal Boiler: chappee c26
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