Hey gang,
After some serious frustration I've finally restored to ask you guys for advice..
I know this has been covered before, and for the life of me I'm stumped.
After two kak off the shelf master cylinders that started leaking out the back of the master while still in the bleeding process.. I purchased a decent golf m.c from norbrake fitted and the process has gone much better, however when left over night the one rear disk caliper is locked up so tight you cannot budge the disk.
Stripped the caliper off, rotated the piston into origin, placed back and tested. Left over night and again, locked up in the morning...
Do I have air or something stuck somewhere?
The bleed screws are at the top of the calipers, the m.c is at a higher position as I've set my jack stands in this fashion so the car leans down to the back as advised in other posts..
The pin going into the m.c is set at 2mm gapping before contact.
Bleeding process is as normal, passenger rear, driver rear, passenger front and finally driver front..
Spitting snakes! If anyone can assist I'd be in an ever debt to you.
Disk brakes bleeding blues
- retrovan
- Donor
- Posts: 8709
- Joined: Mon Feb 07, 2011 8:51 pm
- What model do you have?: 52T1,68FB,72Bay,75FL
- Location: Eich! no, in Jefferys Bay
- Has thanked: 421 times
- Been thanked: 539 times
- Contact:
Re: Disk brakes bleeding blues
You are right, this is normally due to the peddle shaft being too long, but as you said you have tested the play, this should not be the problem.
Think you should systematically try to find the issue,
So when the disk is locked up, get someone too look at the brake fluid level , or mark it on the reservoir, and push the locked pistons back with a screw driver,
If the level goes up, the fault is not the M/C
Then look at your flexible pipe, on that wheel, if it has a kink, or blockage, best to remove it, bleed the brakes with pipe off, and clear the line, then replace old flexible pipe with new.
Good luck
Herman
Think you should systematically try to find the issue,
So when the disk is locked up, get someone too look at the brake fluid level , or mark it on the reservoir, and push the locked pistons back with a screw driver,
If the level goes up, the fault is not the M/C
Then look at your flexible pipe, on that wheel, if it has a kink, or blockage, best to remove it, bleed the brakes with pipe off, and clear the line, then replace old flexible pipe with new.
Good luck
Herman
1952 Split Beetle 1835cc
1968 Fastback 2Lt.type4
1972 Low Light Bay Panel Van 2Lt type 4
1975 Fleetline Panel Van 1914cc
2020 MeFusco Beetle Truck 2Lt type 4
1972 FT Hahn SP 1776 cc
1968 Fastback 2Lt.type4
1972 Low Light Bay Panel Van 2Lt type 4
1975 Fleetline Panel Van 1914cc
2020 MeFusco Beetle Truck 2Lt type 4
1972 FT Hahn SP 1776 cc
- Riaan.N
- Oil Seal
- Posts: 422
- Joined: Mon Jul 13, 2015 1:23 pm
- What model do you have?: 1975 1600 TP Beetle
- Location: Pretoria
- Has thanked: 3 times
- Been thanked: 38 times
Re: Disk brakes bleeding blues
I had an issue on our hyundai where the one brake calliper would ‘lock up’ (the wheel still turns but with a lot of effort).
Turns out the 2 guide pins of the calliper was rusted. Sorted that out and used a little copper slip. No problem since.
I have since been told that copper slip is not a wise choice and got some ‘grease’ that is supposedly specifically for use on the callipers.
Sent from my iPhone using Tapatalk
Turns out the 2 guide pins of the calliper was rusted. Sorted that out and used a little copper slip. No problem since.
I have since been told that copper slip is not a wise choice and got some ‘grease’ that is supposedly specifically for use on the callipers.
Sent from my iPhone using Tapatalk
- fourier
- Oil Cooler
- Posts: 342
- Joined: Fri Sep 26, 2008 1:21 pm
- What model do you have?: '59 Ghia, '77 Beetle
- Location: Melkbosstrand, Cape Town
- Has thanked: 31 times
- Been thanked: 37 times
Re: Disk brakes bleeding blues
Does the rear caliper become locked-up over night, or does it stay that way after depressing the brake pedal?
(o= i =o) (o\ ! /o)
-
- Oil Stain
- Posts: 196
- Joined: Fri Jul 25, 2008 12:09 pm
- What model do you have?: 1600 S & Oval
- Location: Johannesburg
- Been thanked: 2 times
Re: Disk brakes bleeding blues
Hey volks,
Thanks for the responses thus far...
Locks up over night.
Running free while testing the hub, push the pedal, locks, release pedal, runs free, left over night and locked up properly! Where you literally cannot budge that hub, driver rear caliper.
Thanks again for the info and interest guys.
Thanks for the responses thus far...
Locks up over night.
Running free while testing the hub, push the pedal, locks, release pedal, runs free, left over night and locked up properly! Where you literally cannot budge that hub, driver rear caliper.
Thanks again for the info and interest guys.
...low n slow...
-
- Oil Stain
- Posts: 196
- Joined: Fri Jul 25, 2008 12:09 pm
- What model do you have?: 1600 S & Oval
- Location: Johannesburg
- Been thanked: 2 times
Re: Disk brakes bleeding blues
Hey retro,
I've come right, and found indeed that the drag and eventual lockup came from a two issues..
1.Striped the complete rear driver side caliper, found a very sticky black residue on the top caliper pin, this could push in easily enough but was a bit tough coming back out.. Sorted that.
2. I filled the MC too much and ultimately this couldn't draw back enough when realising the pedal, just strange that it would lock up much later on???
None the less. Since the redo.. Been perfect!
Thanks everyone.
I've come right, and found indeed that the drag and eventual lockup came from a two issues..
1.Striped the complete rear driver side caliper, found a very sticky black residue on the top caliper pin, this could push in easily enough but was a bit tough coming back out.. Sorted that.
2. I filled the MC too much and ultimately this couldn't draw back enough when realising the pedal, just strange that it would lock up much later on???
None the less. Since the redo.. Been perfect!
Thanks everyone.
...low n slow...