Rear Brake issue

[MAXIBOY]

is that the underneath of your car maxiboy?

yeah it is was still putting it back together then...

[Northerner]

Took the car in for its MOT and it failed on the parking brake efficiency.

The brake force meter readings were:

Footbrake- NSR 44kg/OSR 43kg
Handbrake - NSR 85kg/OSR 56kg

Park brake efficiency: 12% (16% is the pass mark)

I'm thinking this looking like a caliper issue after all.

What does everyone think?

[MAXIBOY]

did they pass first time..

yes if i remember..footbrake needs to work well enough to adjust them out so effects the handbrake..

if there not bleeding very well then the bias valve still looks at fault..

just change all three to be sure..

[Northerner]

Damn!

Looks like I'll have to get the blowtorch out and see if I can get those hose unions out from the bias valve.

Any idea where I can get hold of a caliper refurb kit?

[MAXIBOY]

most motor factors and renault..maybe gsf..eurocarparts..

[BristolSam16v]

Better off just buying a new caliper, some guy was selling them on ebay for under 60 quid posted.

[sleeky]

Sorry to hijack this topic a bit but I was just about to post the same thing!

I have checked my bias valve and I can't move the 'pedal thing' freely, only a tiny little bit back and forth, doesn't feel as if the piston is moving.

I will try and bleed the calipers tomorrow but i suspect the valve is shot.

Lee.

[busterhymes]

worth just giving the arm a good sprayin with releasing spray may just be the arm pivot thats partially seized then leave it to soak then work it back and forth as you spray more on could do the trick good luck

[Wobba]

Undo the two little securing bolts at the end of the rod. Grease up the pedal pivot joints and push it back and forth loads. Push the piston in and test by letting the pedal go. It should push itself out by itself.

Once nice and free, put back together, get car on ground, get back under it and adjust the rod/nuts so the pedal is under pressure and fully open from the rod pulling it toward the front of the car. Not too tight, not too soft.

Test car and braking paying attention to rear balance.

Adjust as desired

[sleeky]

Thanks for the tips both...

I have left it to soak overnight in WD40 - tried to undo the nuts but they were rusted solid, shall see if there is any movement tomorrow

Lee.