pimp my caravan brakes - hydraulics sizing question

[MRMOPARMAN]

hey guys, got a vintage caravan off a mate and am doing the brakes and shit so i can use it.

atm i got the wheel cylinders reco'd, replaced the copper brake lines with bundy, but am stuck on the master sizing.

the old master is a vintage PBR unit and is seized to fuck, so i cant get it apart to size up atm.

brakes look like E/H series holden? wheel cyls are 1" bore over the usual 5/8"-3/4" sizing.

its only single axle. so im thinking 7/8" master?

anyone a hydraulic sizing yoda that can confirm or deny?

TIA. off to douse the old master in diesel...

[Sprinkles]

If the master cylinder is stuffed, why not cut it in half and measure the bore? It’s going in the bin anyway.

[MRMOPARMAN]

Thats a very good idea! I might just have to do that

[Gammaboy]

Usually the bore is cast into the body of the master somewhere?

[MRMOPARMAN]

Yeah i had a good look over it but nothings cast in like usual. There is a tin plate rivitted to it, but the info on it has long since rubbed off.

[awdmoke]

I'd go with a 7/8", a 3/4 would be too small for those wheel cylinder sizes.

[dattoman1000]

Gurus like pictures
Then they can tell you what you have
And maybe even recommend something

[MRMOPARMAN]

This is the old girl there.

[dattoman1000]

That fuckers older than me
Time to change your hitch and fit a modern one with 7/8 master

[fly510]

considered updating to electric brakes? yes i know more cost etc but if you're going to keep it...

[nastysven]

If you want a new axle with leccy brakes, give me the numbers and I'll get a price. The last lot went really cheap.

Got a bit of a hookup with holroyd.

PS, dont you know some cunt that works at Barker? Surely there's hook up there?

[MRMOPARMAN]

That fuckers older than me
Time to change your hitch and fit a modern one with 7/8 master

1964 the van was built!
For sure, that was the plan all along. So you reckon 7/8 is the go size wise?

considered updating to electric brakes? yes i know more cost etc but if you're going to keep it...

Yep. The van needs a full resto. Will look into stuff like that if we go all the way.

If you want a new axle with leccy brakes, give me the numbers and I'll get a price. The last lot went really cheap.

Got a bit of a hookup with holroyd.

PS, dont you know some cunt that works at Barker? Surely there's hook up there?

Thanks for the offer! im just doing the basics to get the van usable atm. However i also need axles and brakes for my car trailer in the next few weeks, so ill hit you up when i know what i need..
I do know some ex barkers guys. But barkers only does truck trailers, not automotive stuff.. Oh and they are rough cunts

[nastysven]

rough eh? They're that good we have to go up there and measure our trailers to make sure they have built them the right length... and that they are square and dont fall apart the 1st time you load them.

[MRMOPARMAN]

Haha, yep thats barkers!