For the brake genius out there.

[macca]

I have fitted new front pads and rear slave cylinders (drums on the rear).

I had to force the front pistons back to fit the new pads.

Now I have a soft pedal, long travel before the brakes start to work.

Pump the pedal and feels OK till next time.

Hold foot on pedal and it slowly goes to the floor.

We have bled the brakes twice including the proportion valve.

Any ideas what is playing up.

[93patrol]

Sounds like air still in the line. Start with the furtherest wheel away from the master cylinder left hand rear. Then RHR,LHF and finally RHF.

Are you using Dot 3 or Dot 4 fluid

[nissannewby]

Sounds like air still. What procedure are you using to bleed?

[NP99]

Have you started the bleed in the correct sequence? Starting from the nipple furthermost away from the master cylinder?

[macca]

LR, RR, LPV, LF & RF. 2 person, open pedal down, close pedal up. Thinking if it's air it would not firm after pumping the pedal.
Also the pedal going to the floor, could the master cylinder be leaking back past its piston.
I don't know if I have the wrong end of the stick.
It's doing my head in.

[macca]

Are you using Dot 3 or Dot 4 fluid

Just checked its Dot4

[pearcey]

Forget about the bleeding sequence as the master is split in to two separate systems and it doesn`t matter where you start.
What your problem sounds like is the master is bypassing to check this clamp the hoses going from the body to the DIFFS then see if the pedal slowly goes to the floor, if it does then the master needs to be replaced. If the pedal is solid then the master is OK. If OK release one clamp and check then reclamp and release the other clamp. This will tell you which end has the problem.
You can clamp the hoses off with a couple of G clamps BUT DO NOT clamp braided hoses.
Hope this helps

[macca]

Pearcey that sounds like a good way to fault find, that's what I will try tomorrow, report back with my findings. Thanks mate.

[pearcey]

Pearcey that sounds like a good way to fault find, that's what I will try tomorrow, report back with my findings. Thanks mate.

When bleeding the system, bench bleed the master or start at the master then go to any wheel it doesn`t matter which and with help get someone to push the pedal down then open the bleeder, then shut the bleeder, get the person to SLOWLY release the pedal TAKE FROM 5 to 10SECONDS wait a couple of seconds then have them depress the pedal again when they have depressed the pedal open the bleeder, repeat this until you have new fluid flowing at that bleeder. Do the same at each wheel and you should be successful. By pumping the pedal as most do can create problems where when the pedal is released fast air is drawn in past the cups in the wheel cylinders.
Any problems pm me, 45 years a brake specialist.

[pearcey]

Sorry macca I missed the 2000 posts as I just got back from Tas CONGRATS mate