F15A Brake Wheel Cylinder Size

[Tony Smith]

As Rob Love has stated above, the front are 1 3/8", the rear 1 1/2", same on all CMP Ford and Chev 4x4s from 15cwt up to 60cwt (Note: Chev CMPs use the same Ford brake components in the wheels!). FGT and 60cwt also have brake boosters.

Smaller vehicles (F8, C8, C8A, C8AX, F15, C15) tend not to be standardised and are a mix of civvy truck components.

[sth65pac]

Originally Posted by Tony Smith

As Rob Love has stated above, the front are 1 3/8", the rear 1 1/2", same on all CMP Ford and Chev 4x4s from 15cwt up to 60cwt (Note: Chev CMPs use the same Ford brake components in the wheels!). FGT and 60cwt also have brake boosters.

Smaller vehicles (F8, C8, C8A, C8AX, F15, C15) tend not to be standardised and are a mix of civvy truck components.

AH HAA, Thankyou Tony. Well 1 1/2" Is easy enough to get. Happy with that. Inch & 3/8" a little trickier.

Cheers,

Ian

[Hanno Spoelstra]

Originally Posted by sth65pac

AH HAA, Thankyou Tony. Well 1 1/2" Is easy enough to get. Happy with that. Inch & 3/8" a little trickier.

Ian, if you go back up and follow the links to the information provided, you will find most if not all data you need. Please bear in mind it isn't only the piston bore size which matters, but also the dimensions and shape of the cylinders which have to fit the brake backing plate.

HTH,
Hanno

[sth65pac]

"Ian, if you go back up and follow the links to the information provided, you will find most if not all data you need. Please bear in mind it isn't only the piston bore size which matters, but also the dimensions and shape of the cylinders which have to fit the brake backing plate."

Thanks Hanno,

Well I am exploring the possibility of shifting to modern alternatives and the backing plate can be easily modified to fit a wheel cylinder. i.e. welded up and re-drilled if need be. I am then not restricted by the shape or fittings as these are the main issues with remaining in current configuration. It is very restrictive and an alternative may be possible.

Nothing ventured, nothing gained. I have a ways to go before I hit this part of the restoration.

Cheers,

Ian

[Hanno Spoelstra]

Originally Posted by sth65pac

Well I am exploring the possibility of shifting to modern alternatives and the backing plate can be easily modified to fit a wheel cylinder. i.e. welded up and re-drilled if need be. I am then not restricted by the shape or fittings as these are the main issues with remaining in current configuration. It is very restrictive and an alternative may be possible.

O.k., I understand what you are saying. But surely brake cylinders which fit are available in your part of the world? Either re-sleeved originals, NOS, or newly made ones as listed earlier on?

Anyway, let us know what you come up with!

Cheers,
Hanno

[sth65pac]

Thanks Hanno,

Yes you're right about sources, but I'm going to see what's out there as delivery from O/S can be rather expensive.

At least I can focus on the truck now after eternity of it sitting and patiently waiting for me to start. Well ten years!

Those who know me know I am no slouch on restorations. Though a sidevalve V8 and a separate transfer case has me slightly wary.

http://i571.photobucket.com/albums/s...psm1bxu5t0.jpg

Ian

[Tony Smith]

Originally Posted by sth65pac

Thanks Hanno,

Yes you're right about sources, but I'm going to see what's out there as delivery from O/S can be rather expensive.

Ian

As has been stated above, there have been many threads about these wheel cylinders before, and they are readily available, with cheap postage. For example: Rear Cylinder and Front Cylinder. Like you, I live in a regional area, and I can't drive to Sydney and back for that postage cost, and my local brake parts supplier (ie small/rural, only sells one of those every 10 years) can't match that total price.

As for modifying your backing plate to accept a modern replacement. I would only consider doing that if original design parts were completely unobtainable from any source. I have worked on vehicles that have had components sourced from a mish-mash of other sources, and there is nothing worse.

Have some consideration for the restorer who is going to be working on your vehicle in 25 years time as he (or she) tries to work out what exactly they have before him, and then tries to put together a 3 Tonne Iveco brake shoe with a Case-IH wheel cylinder filled with Isuzu Van cups and 90-97 Landcruiser boots and metric pipe unions on a 1/4" brake line. You really don't appreciate the accursed devilry involved until you encounter it (of course, on a Saturday after all the shops have closed! ). Consider too, that what you choose today as a modern replacement may not be widely available in the future, while the vintage original still will be.

The original parts are available and reasonably cheaply, and everyone else will know what parts are on the vehicle and where to get them.