31 replies to this topic

[Indy Orange]

I know the HK HT HG series differ in rear brake drum size to the LC/LJ ,but are the internals the same size ? Like the brake adjuster plate ,thanks Paul.

[Indy Orange]

Are the wheel cylinder push rods the same?

[Indy Orange]

Adjusters are bigger ,are the plates the same?

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[warrenm]

Most of the smaller parts will interchange between the 2 drums.

 

Adjusters are bigger ,are the plates the same?

What "plates" are you referring to?

[Indy Orange]

No 9 Warren ,lever brake adjuster and No 12 plate brake adjuster lever pivot.

[Indy Orange]

Same as HK T G and HQ?

Is it just the drum size which is bigger?

[Indy Orange]

107 views and no one knows ,common guys?

Edited by Indy Orange, 03 July 2018 - 08:36 PM.

[Dr Terry]

Hi Paul.

 

I've just gone thru the various parts catalogues & compared the parts for LC/LJ rear drum brakes with HK/HT/HG rear drums.

 

It appears that very few parts will interchange. Apart from a very few minor parts, the adjuster, virtually all of the springs & the self adjuster mechanism are all different. Even the pins which retain the shoes to the backing plates are different.

 

About the only part which is the same is the wheel cylinder itself. If we compare cars with front disc brakes, both the Torana & its big brother get 9/16" wheel cylinders. which BTW done have "push rods", the piston pushes directly onto the brake shoe.

 

Dr Terry

[Indy Orange]

Much appreciated for the response Dr Terry,I did not know the wheel cylinders had no pushrods ,so thanks for that ,will have to chase up some Torana specific rear drum parts ,apparently Gemini have the same set up.

[Dr Terry]

Much appreciated for the response Dr Terry,I did not know the wheel cylinders had no pushrods ,so thanks for that ,will have to chase up some Torana specific rear drum parts ,apparently Gemini have the same set up.

Be careful swapping parts between different cars. The Torana rear brakes are basically the same as EJ, EH, HD, HR, LH, LX, early UC & early Gemini.

 

The main problem is however there are many minor differences, the main one being cylinder size. The small 9/16" wheel cylinders used on your car, are only seen on HD/HR (with discs), HK/HT/HG (with discs) & LC/LJ (with discs). These small cylinders have no pushrods, which means that the shoes have no cut-outs & are unique to these models. Also EJ/EH have no self-adjusters, so some hardware on those is different.

 

So in short, you can use some hardware out of these other cars with 9" drums but not the cylinders or shoes. Also as discussed earlier, not much from the larger 10" drum cars can be used either.

 

Dr Terry

[S pack]

Hi Paul

 

This is what Dr Terry is talking about. You can see in the pic the LC/LJ rear brake shoes to suit with disc front brakes sit directly against the metal capped ends of the wheel cylinder alloy pistons.

[Indy Orange]

Thanks Dave ,Dr Terry ,thanks for looking all that up mate!Did know they were so specific .Will have to buy the shoes to suit.

[Indy Orange]

I purchased the Protex wheel cylinders ,Not sure if I should re use the existing shoes or not,can you recommend a good brand to buy ,cheers Paul.

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[RallyRed]

Hi Paul, 

These are the ones I used on my LC GTR.  Similar number. Work fine.

 

p.s. disregard the vernier measurement.

 

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[RallyRed]

. As found, 12/70 GTR.

p.s. also found the flex. hose from body to axle housing was 95% blocked.

 

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[Indy Orange]

Thanks Col,appreciate that mate ,pics saved for reference.

[Dr Terry]

Instead of purchasing dubious quality new Asian made brake shoes, go to a reputable brake place & get your shoes re-bonded with a good quality Australian brake material. If you don't have the correct shoes, by a 2nd hand set & have them re-bonded. This is way better than using some of the cardboard I've seen sold as supposed brake material. Many spend good money on quality disc pads, but never give a thought to shoe material.

 

Where do you live ? If you were in Sydney I could give you some names.

 

On that topic many members don't put the location with their avatar. This gets very annoying when trying to answer some posts, especially when (in this case) suggesting a repairer or supplier near to where they live. I'm not suggesting exact addresses for obvious reasons, but a town or suburb would be good.

 

Dr Terry

[S pack]

^^^ Agree, get the set of shoes you have relined. And don't let any brake shop tell you they can't get old shoes relined.

Protex repro brake shoes and linings are Chinese rubbish. But that is just my personal opinion.

[Dr Terry]

Protex repro brake shoes and linings are Chinese rubbish. But that is just my personal opinion.

My opinion also. This is not just Protex shoes, it also applies to most imported brake shoes on the market today.

 

Dr Terry

[Indy Orange]

Thanks guys,will do ,glad a kept them.

[Sandman 71]

Hi Indy, the pin type wheel cylinders are for the drum brake front set-up. What type of proportion valve do you have? This also much match the rear brake cylinder set-up, because the inside diameters of both the proportion valve and wheel cylinders are a different size.

[Sandman 71]

Pin type wheel cylinder in picture.

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[Dr Terry]

What type of proportion valve do you have? This also much match the rear brake cylinder set-up, because the inside diameters of both the proportion valve and wheel cylinders are a different size.

LC/LJ didn't get a proportioning valve. The little block with the switch is essentially a junction block.

 

The idea of the small diameter rear cylinders was to reduce rear lock-up.

 

They worked quite well, the ratio of front piston to rear must be fairly close. 

 

Dr Terry

[S pack]

Pin type wheel cylinder in picture.

^^^ Used only on cars with drum front brakes.

[S pack]

LC/LJ didn't get a proportioning valve. The little block with the switch is essentially a junction block.

 

The idea of the small diameter rear cylinders was to reduce rear lock-up.

 

They worked quite well, the ratio of front piston to rear must be fairly close. 

 

Dr Terry

100% agree.

 

The only reason the junction block is even required is to house the brake fail switch.