121 replies to this topic

[71Ranger]

Hi Marty,

Firstly congrats on getting the LJ launched, well done.

What was the fix for your rear brakes, I get numerous older Holdens into the shop with various brake issues many of which take huge hours to fix so any additional info to add to the memory bank would be greatly appreciated.

Enjoy your car

Cheers Brian

[sibhs]

Hi Brian, still not fixed. :-(
It just doesn't make sense.
Big rear cylinders seem fine, smalls have no guts.
Big ones are wrong for my setup. ?????????

[S pack]

Hi Brian, still not fixed. :-(
It just doesn't make sense.
Big rear cylinders seem fine, smalls have no guts.
Big ones are wrong for my setup. ?????????

Hey Marty

 

Did you read the info I posted on the previous page?

[sibhs]

Hi Dave, yes thanks.
That's why I'm moving on.
I did try it on stands with engine running and had to really stand on it to get them so I couldn't turn wheel. Not locking up just hard to turn.

[71Ranger]

Hi Marty,

I would not recommend using the wrong wheel cyls to mask another problem.

What if any difference does it make if you use the self adjusters to adjust the brakes.

Cheers Brian

[S pack]

Hey Marty

 

Seeing as I've recently renewed my rear brakes I'll put her up on stands on the weekend and see what rear wheel locking results I get, with and without power assistance.

 

Will let you know how it goes.

 

Cheers

Dave. 

[sibhs]

That's great Dave, interested to hear the result.
By the way Dave, what year and model is your Torana?

Hi Brian, I've tested brakes with no drums on and it can't push against the spring tension. So that eliminates all shoe adjusting or radius ground theory's.

[S pack]

That's great Dave, interested to hear the result.
By the way Dave, what year and model is your Torana?
 

1973 LJ. The brakes are the same as LC and 1972 LJ so the year of manufacture is irrelevant really.

[71Ranger]

Hi Marty,

 

Given that is the case I would now be looking at your master cyl  and or brake lines to the rear.

 

Cheers Brian

[sibhs]

Fully rebuilt master cylinder has been removed and rebuilt again by pro (who I don't trust). Tested by him and said great pressure both pots.

It's as if the rear brake hose expands when pedal pushed. I'll have to check that, but it's brand new.

[71Ranger]

Hi Marty,

 

I initially felt your wheel cyls where not correct ( my opinion on them is they work until they leak ) given your brakes won't adjust I think you need to look at your master.

 

Applying the pedal should mean the rear wheels can't move.

 

Cheers Brian 

[Ice]

Maybe try a different master Marty

[S pack]

Jacked up the old girls rear end this morning and did the deed.

 

Without power assistance and the brake pedal fully depressed (as hard as I can push by hand using a piece of 4 x 2 to simulate Marty's test procedure) the rear brakes will not lock up.

 

With power assistance the rear brakes will lock up (sufficiently that the wheel can not to be turned by hand) but only when I have the pedal fully depressed.

I am confident my rear drum brakes are working correctly.

 

Thinking about it, with the braking forces split 60% front 40% rear it makes sense that the front brakes will lock up before the rears. So if you are ever in a situation where you are braking so hard that the rears have locked then you have already lost control of the car as the front end slides in whatever direction it wants.

Edited by S pack, 06 December 2014 - 10:46 AM.

[sibhs]

This could be good news for me, or bad for you Dave. :-)
Thanks

[S pack]

I believe it's good news for you Marty

[sibhs]

If anyone else has their original brake spec LJ on stands, can they please test as well?

Can't believe I've gone through this grief if that is normal.
Could be happy days.
Cheers
Marty

[71Ranger]

Hi Marty,

That sounds great, hopefully that is the end of it for you. How do the brakes perform when you drive it.

Cheers Brian

[sibhs]

Hi Brian,

They felt like they needed bedding in. (which they do)

 

Once the exhaust is on and wheel alignment done I'll give them a good bedding!

 

Marty

[71Ranger]

Hi Marty,

Sounds like a plan, let us know how it goes.

I'm thinking about nominating S Pack for a Knighthood for services to preservation and restoration of iconic muscle cars.

Cheers Brian

[Dave6179]

You say you don't trust the bloke who did yer master cyl. Why not take it to someone else for another opinion?

[sibhs]

You say you don't trust the bloke who did yer master cyl. Why not take it to someone else for another opinion?

I wouldn't be surprised if he damaged the piston that ment another rebuild.
You get stung $200 for the first check, bit worried about getting shafted again.

[sibhs]

Tested another LJ yesterday. Same deal, no back brakes until you really push hard against the force.
Mine may have been ok all along.