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Frozen front brake
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Frozen front brake
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Jwrigley
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27 Mar 2018 18:50 #190925
by Jwrigley
My Jimnys front ledt brake caliper is frozen thecaliper piston wont return unless you push it back but its not rusty. Any ideas?
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27 Mar 2018 18:52 #190926
by mlines
Brake pipe collapsed internally?
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Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
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Jwrigley
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Jimx5
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27 Mar 2018 20:54 #190935
by Jimx5
Caliper pistons don't return as such and need to be pushed home when changing pads for example, the caliper piston squeezes the pads on to the disc under pressure then stop gripping the disc when the pressure of the brake pedal is released.
The pads will always have a very slight drag on the disc unless your disc is warped then the piston will get pushed back.
My nearside front brake was siezing on this weekend, i took the slider tubes out, cleaned them with wire wool and regreased them, the top one was partially siezed, i then pumped the caliper piston out (4 pedal pumps only) repeatedly and re-compressed the piston back in and at the same time rotated the piston while red greasing the piston.
Not advising you to do this unless you know what your doing, my brake is now free and NOT leaking and i've done about 60mls since.
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Jimx5
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27 Mar 2018 20:58 #190937
by Jimx5
If your brake hose has collapsed, release the bleed nipple and the wheel will rotate freely.
If the caliper has siezed the wheel will not rotate freely when the bleed nipple is released.
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28 Mar 2018 23:08 #191003
by auchenblae
The piston retracts when the brake pedal is released and the twisting of the piston inner seal has enough elasticity to pull the piston back as there is no pressure from the fluid to keep it out against the pads.
In most cases over the years the inner seal becomes less elastic and gets a bit stiff and therefore does not have the elasticity to pull back the piston off the pads. The piston sticks out against the pads
I find replacing the seals lasts say a year and that a replacement caliper in a lot of cases they are new lasts a lot longer. That is both Jimny's MX5's and Imprezas.
eddie
16 SZ3
07 JLX+ gone 16
99 JLX gone 07
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Frozen front brake
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