Rear brakes lock up using service brake

[DanielEZY0252]

My wee Dorris went through the MOT on Saturday and passed but when I brought it home yesterday I had to give the brakes a stab courtesy of a guy pulling out in front of me (thanks) but when I danced on the anchor the back wheels locked up. I slacked off the spring at the equalizer which has rectified the issue and there is still good braking from the van and she stops with no problem but the pedal feels spongey. How would I rectify the spongey feel of the pedal?

Thanks in advance

Daniel

[frank]

if they,re drums on the rear then i would shamfer the shoes, and adjust the compensator back up

[Gadgetman]

There's just so much that can be broken...

I would suspect the rear brake cylinders to be shot.

Equalizer?
DO you mean the Load sensor?
(the metal block sitting next to the righthand rear wheel, with a spring down to the suspension arm)

It may also be damaged somehow.

Most likely, one of those parts allowed air into the system, so at the very least you need to bleed the system.

If the brakes are original to the car, it may be time to do a rebuild.
Luckily, the parts aren't all that expensive. It's just a bit fiddly and timeconsuming.
And a bl**dy mess if the pipe nuts have rusted solid.

[DanielEZY0252]

if they,re drums on the rear then i would shamfer the shoes, and adjust the compensator back up

There's just so much that can be broken...    

I would suspect the rear brake cylinders to be shot.  

Equalizer?
DO you mean the Load sensor?
(the metal block sitting next to the righthand rear wheel, with a spring down to the suspension arm)

It may also be damaged somehow.

Most likely, one of those parts allowed air into the system, so at the very least you need to bleed the system.

If the brakes are original to the car, it may be time to do a rebuild.
Luckily, the parts aren't all that expensive. It's just a bit fiddly and timeconsuming.  
And a bl**dy mess if the pipe nuts have rusted solid.

It's recently had new pipes and shoes at the back, I've fully bled the system using a bleeding kit but I will try bleeding the system again and go from there. I will also shamfer the edge of the shoes and see what the results are.

[frank]

if they,re drums on the rear then i would shamfer the shoes, and adjust the compensator back up

There's just so much that can be broken...    

I would suspect the rear brake cylinders to be shot.  

Equalizer?
DO you mean the Load sensor?
(the metal block sitting next to the righthand rear wheel, with a spring down to the suspension arm)

It may also be damaged somehow.

Most likely, one of those parts allowed air into the system, so at the very least you need to bleed the system.

If the brakes are original to the car, it may be time to do a rebuild.
Luckily, the parts aren't all that expensive. It's just a bit fiddly and timeconsuming.  
And a bl**dy mess if the pipe nuts have rusted solid.

It's recently had new pipes and shoes at the back, I've fully bled the system using a bleeding kit but I will try bleeding the system again and go from there. I will also shamfer the edge of the shoes and see what the results are.

highly likely the new shoes self grabbing then, my nearside rear has been locking up since i gave it a good spray with carb cleaner, shamfering the leading edge has always worked for me in the past