Transit tipper brake problems

[NoRush]

My Y reg 2000 model transit front brakes seem to be sticking on when I brake hard and then slowly release. I've checked them today and removed the guide pins top and bottom,(that hold the two halve together) cleaned up and re greased. The brake callipers look in good condition. Any idea what it could be

[Graham]

Flexible hoses breaking down. Causes the brakes to stick and slowly release. Had the same problem.

Edited July 15, 2013 by Graham

[Hogs Breath]

Vacuum pump?

[Tyz05]

Is it one side or both? Had one in this morning,similar symptoms,right hand front,no visible defects,calipers returned freely,turned out to be collapsed brake hose,£12 problem solved. You need to know if it's brake fluid presure causing the problem or a mechanical fault,sticky caliper or pads. Try opening the bleed nipple when the brake is binding,see if there is presure in the system

[NoRush]

Was thinking vacuum pump Can a simple tested be done to check in.

The hoses look ok on the out side would they breakdown from within.

Thanks Tyz will check tomorrow

Edited July 15, 2013 by NoRush

[Graham]

Was thinking vacuum pump Can a simple tested be done to check in.

The hoses look ok on the out side would they breakdown from within.

Thanks Tyz will check tomorrow

 

The hoses will look fine. They collapse inside.

[gensetsteve]

Sounds like seized pistons in the calipers. Salt gets in then they are stiff they move under hydraulic pressure but not so keen to let go. Wind them in and out a few times with a G clamp if they are stiff get them reconed. Surprising how good a brake fluid change is every 2 years have you seen the colour of old brake fluid compared with new.

[swinny]

sounds like you've checked most bits, but you need to make sure the pistons in the calipers are working ok, and the dust boots are intact.

 

Try pushing the pistons back in. If they go back in then good.

 

If they don't then loosen the bleed nipple on the caliper, if they then go back in, it says that the flexy brake hose is knackered by not letting fluid pass back.

 

[NoRush]

Thanks all will check all tomorrow. Looks like another morning covered in brake fluid. O the fun

[Tyz05]

As Graham has said the hoses will look fine from the outside. You just need to find out if it's a problem with the fluid system or a mechanical fault. It could be any of the things mentioned,you just need work out which it is. As a seperate note,brake fluid isn't very good for your skin or paint work. Keep us posted with your results