For the brake genius out there.

[Old Wal]

Whilst certainly no expert on brakes I experienced a similar problem recently. I had new ( genuine - purchased from patrolapart ) master cylinder fitted by a "reputably" brake business in Wodonga as mine was weeping. Asked them to adjust rear brakes ( drum ) at the same time. Picked up my ute and pedal was going to floor but would firm up with constant use . Took it back & they re bleed system , assured me that they had gotten all air out. Still no good. Went back , they said master cylinder must be faulty. Clamped off brake hoses as pearcey suggested - at least they knew about that technique. Pedal was solid. They then seemed a little lost and proposed a major investigation ( at my expense ) which I declined. Took my ute to another brake guy & discussed problem with him. He mentioned the issue with air being drawn in past the cups but he said it could just be a brake shoe adjustment problem. Left my ute there & he re bleed brakes just to be sure - got " bugger all " air out . Adjusted rear brakes shoes and road tested - all GOOD. My brakes are fine now, probably better then they have been for ages. Needless to say I won't be using the other mob again. Anyway just my experience.

[macca]

Thanks Wal, I'll check the adjustment tomorrow too.

You guys have been a great help.

[NP99]

Whilst certainly no expert on brakes I experienced a similar problem recently. I had new ( genuine - purchased from patrolapart ) master cylinder fitted by a "reputably" brake business in Wodonga as mine was weeping. Asked them to adjust rear brakes ( drum ) at the same time. Picked up my ute and pedal was going to floor but would firm up with constant use . Took it back & they re bleed system , assured me that they had gotten all air out. Still no good. Went back , they said master cylinder must be faulty. Clamped off brake hoses as pearcey suggested - at least they knew about that technique. Pedal was solid. They then seemed a little lost and proposed a major investigation ( at my expense ) which I declined. Took my ute to another brake guy & discussed problem with him. He mentioned the issue with air being drawn in past the cups but he said it could just be a brake shoe adjustment problem. Left my ute there & he re bleed brakes just to be sure - got " bugger all " air out . Adjusted rear brakes shoes and road tested - all GOOD. My brakes are fine now, probably better then they have been for ages. Needless to say I won't be using the other mob again. Anyway just my experience.

Are they the mob near the railway line up the Bandiana end? The stuffed my tray back up years ago

[macca]

The clamp test had shown the problem is in the rears. On to something. Yeha

[macca]

Adjusted the rear shoes, only about 5 or 6 clicks.

Is a bit better, now I'm waiting for a hand to bleed the system again.

Pauly's out for the day and Dads deaf, daughters home but sleeping I'll get it done somehow. LOL

[Robo]

The valve above rear diff needs bleeding also.

[macca]

OK I now have a dilemma.

Engine off its great.
Engine on the pedal goes down heaps, 2nd pump its fine. Leave it of 5 second's the pedal goes down heaps again.

I have to wait for Pauly to get home to bleed it again...

[macca]

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.

Right we have done this, problem still exists, clamped rear hose and it's gone. There must be something not right with one of the new rear slaves. I think...

[93patrol]

Adjust your rear drums up until there is constant scraping of the shoes on the drum or I was told adjust until it locks the wheel and then back it off until the wheel moves with moderate pressure but can hear the brake shoes on the drum

[nissannewby]

Are you blocking it before or after the LSV? I believe the LSV returns to the master so you could have a dodgy LSV (proportional valve)