Brake master cylinder bodgery?

[julianf]

I understand it's a provocative title!

Anyway...

I've been considering acquiring an ex mod Sankey trailer for a while, but the model I'm considering (wide track mk3) has a brake master cylinder thats, essentially, unavailable.

The cylinder has, I think, a .825 inch bore, whilst most landrover series units are .75 inch.


You would assume this was intentional. Ie a larger bore was required rather than the convenience of just grabbing the usual unit off the shelf.


Anyway, someone is flogging a trailer near me, and, of course, the master cylinder is stuffed.

I did find a retailer who had some nos units but these too will be ancient and at over £200 a hit with the vat etc for something that has been decaying on a shelf for the past 30 years...




So -

What's the chances of being able to find a new unit with the slightly unusual bore that can be "made to fit" in a suitable and proper way?

Thank you.

 

[ajlelectronics]

What's the chances of being able to find a new unit with the slightly unusual bore that can be "made to fit" in a suitable and proper way?

Thank you.

There are refurbishing companies who clean up the bore and fit a stainless insert. However they don't come cheap but it should last forever. Same problem with Scimitar MCs, they are well over £200 if you can find one.

 

[julianf]

I'll be honest - there is an issue of cost too.

I know some would say it's irrelevant, but it's always easier to justify spending £200 on a £10k vehicle than it is on a £300 trailer.

So, yes, options, but, realistically, I don't think I want to buy a £300 trailer and then spend an instant £200. I'd probably rather go a "level up" and get a penmann.

 

[Cobbler]

Might be worth giving Bigg Red a ring & seeing if they can suggest help or an alternative

 

[dieselsamurai]

21mm one which is damn near 0.825 im sure there are lots out there close to it

Tilton 75 Series Alloy Brake / Clutch Master Cylinder Kit Part 13/16 21mm | eBay

<p>Tilton 75 Series Alloy Brake / Clutch Master Cylinder Kit Part 13/16 21mm. </p><p>This was bought for a Elan +2 which was being prepared as a race car </p><p>The cylinder spacing are the same as the lotus set up </p><p>See the pedal box listed </p><p>These cost around £140 and are still...

www.ebay.co.uk

 

[winchman]

To be honest I would just make something else fit as long as its a similar capacity why not?

 

[dieselsamurai]

I couldnt get the girling one for my dumper so just got a generic one with the same piston size and it works fine

 

[Melvyn Best]

Past Parts in Bury st Edmunds can recondition brake cylinders, they did one for me on an Alfa Romeo , one Alfa specialist had one , he wanted £600 plus VAT , cost me a total of £90 twenty years ago

 

[willie.macleod]

Just choose the correct one from CBS: https://www.carbuilder.com/uk/master-cylinders

 

[winchman]

Just choose the correct one from CBS: https://www.carbuilder.com/uk/master-cylinders

Thats not bad

 

[julianf]

This is a photo that I have from the seller -

You can see that the top of the fluid reservoir has been smashed off...

...and a green line of algae present on the resultant funnel that's been catching rain and, I'm sure, directing it down to the calipers.

It all looks do-able but I'm not sure I want to get involved at the asking price. The tub is stuffed and the brakes will be sure to cost some money, and I'm just not sure it adds up, although I'm going to have a bit of a look at the caliper situation before I write off the idea altogether.

I'm told the calipers have "Ford" markings on them. I guess they may, or may not, be original.

 

[winchman]

Its a tough call as its easy to buy a cheap one spend ages on it when it would be easier and possibly cheaper to buy a good one.

 

[julianf]

Its a tough call as its easy to buy a cheap one spend ages on it when it would be easier and possibly cheaper to buy a good one.

Exactly. This one isn't that cheap (£300).

A smart mk3 maybe goes for £450 ish, so I figure this one would have to be more like £200, but it's rare that sellers want to knock a third off the price of anything.


I've read, on old landrover threads, that the calipers are "0659/7 ford scorpio" but, my suspicion, is that the number is the casting rather than the part number. A very brief look about suggests maybe £70 side for the calipers.

I'm not going to end up with change from £200 and it will probably be worse than that even once the lines are on there too.

Shame as it's just down the road from a friend and I could have arranged it easier than most, but I just can't make the numbers work.

 

[winchman]

Would no other trailer suffice?

 

[500e]

A 13/16" Is not a mile away

Master Cylinder 0.813" (13/16") Bore

This aluminium cylinder has a 3/8" UNF x 13mm deep, outlet thread with concave seat. (A steel adapter is included that has a short female 3/8" UNF thread with a convex seat). The fluid inlet thread is 7/16" UNF x 15mm deep with a convex seat. The push rod has a 5/16" UNF thread and a stroke...

www.carbuilder.com