For the brake genius out there.

[93patrol]

Great outcome Macca at least you now have a solution to the problem. I am sure you are sick of working on your brakes by now

[Parksy]

Can you use a syringe and fill the slave via the bleed nipple?

[macca]

Can you use a syringe and fill the slave via the bleed nipple?

Parksy you could, just got to displace the air somehow. Just got it all back togeather, and bled , will adjust the shoes after we have a coffee. See how we go.

[Parksy]

Hmmm. I wonder if you can crimp the rubber hose and use a syringe to create a vacuum within the cylinder, then close bleed screw then undo the crimp. It works for filling in windscreen cracks. Just an idea.

[macca]

Well it's on the road, pedal is still spongy, bugger, like before but consistent.
No more pedal to the floor stuff.
So I'm happier today with this result. The wheels lock up with savage braking which is what I need.
The pic has a piece of wire through the nipple location, shows how much of an air filled void is not bled out.

[macca]

A big thank you to all that contributed to getting this thing working again, its been a pain in the butt but I'm a whole lot happier its working better.
Can not understand the design flaw though, very strange.

[NP99]

Are the GQ and GU cylinders the same or inter changeable?

[Alitis007]

While driving if you pump the brake pedal twice and hold down on the third pump does the brake pedal come up higher ?? To me most of your brake problems is the adjustment. Being and LSD drum brake system, lock the adjusters till the wheel cannot turn then back off 3 or 4 teeth of the adjuster on each wheel, when you rotate the wheels by hand you should hear a consistent scrape during a whole revolution. Brake adjustment should be made with wheels on DO NOT PUT A BAR ACROSS WHEEL STUDS UNLESS YOU WANT TO BREAK THEM OR DAMAGE THE THREADS as i seen someone recommend you do earlier.

When you bleed the brake fluid you should jack the back higher and have the side furthest away from the brake hose a bit higher, gravity bleeding gets most of the air out this way followed by pressure bleeding should see you have a great pedal.

[macca]

DO NOT PUT A BAR ACROSS WHEEL STUDS UNLESS YOU WANT TO BREAK THEM OR DAMAGE THE THREADS.

Yeah I figured that one out after the bar slipped and a big lump of me is now attached to the Nissan LOL bloody idiot me!! Where's them gloves, oh yeah right here beside me, FFS.

I am heading into town tomorrow night in it so will give it a work out, I'm sure I can get it better.

I will do as you say about the adjusting, Dad was here today and although appreciate what he did he is not strong enough to turn the wheel / tyre. Them diffs are tight buggers, no wonder everyone says they are the best.

Did the back up / nose down thing to get the cylinder level, bloody hell mate I have tried everything, it was driving me nuts.

Funny thing swearing with a gob full of a bullocky's worst didn't make any difference either!

Appreciate all the advice, every bit has contributed to getting me back on the road, the ute has been on the stands in the carport for 9 days today. I needed all the help you all gave me.

Thanks again team.

[Cuppa]

OK patrollers we have a solution to the problem.
Went to brake place this morning, the problem is a Nissan design fault.
As soon as I described what you had recommend I do he said is it a Patrol? Then showed me the problem and the fix.
The bleed port in the cylinder is not at the top so air can not get out when bleeding.

Hmmm, sounds like an opening for some enterprising company to produce or source aftermarket wheel cylinders with a bleed nipple which allows the air out!