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XK150S Brake Servo

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vettedog72

Jedi Knight
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Reference XK150S 1959 Roadster
Help me decise what to do with my brake servo. I bought a new servo with the master looking cylinder mounted on servo but it is not much like the one that came off the car. If these pictures work you should see a rusty one and a nice new black one. I don't want to make any modifications to the car that would involve hacking anything. Can you ID the "new servo/cylinder" from the pictures (hopefully it is Jag)? Is there a simple way to connect it up with out a hack job?

image https://i7.photobucket.com/albums/y295/badandy743/Picture062highlight.jpg[/URL]
image https://i7.photobucket.com/albums/y295/badandy743/Picture064highlight.jpg[/URL]
image https://i7.photobucket.com/albums/y295/badandy743/Picture062.jpg[/URL]
 
well I was waiting for someone else to reply to this, but nobody has, so here it goes:

the new servo doesn't look right, I would not hack the system or the car, you'll regret it later. Insist on the original part.

If you cannot get the original part, you can try to have yours rebuilt professionally. By who??

contact a place like White Post Restorations in Virginia.
Might be expensive there but what price your life when it comes to brakes??

Just my dollar's worth.

Ex
 
The nice shiny black one looks like a universal remote servo.Checking in SNG barratt's catalogue it looks like they supply the same(universal type).However -you should be able to make an adapter plate to pick up from the 3 studs on the new one and use the original mount,and the mount that goes on the cylinder looks as it is a direct changeover.so long as the pipe threads are the same then it should not be very difficult to fit without any hacking of the body or original mounts.Or as suggested already have yours rebuilt, if it is in a condition to be rebuilt.
 
hey Mike, all the way from España ehhh? My girlfriend's family is from and lives in Madrid.

I have a question for you: are there a lot of Jaguar parts in Spain? N.O.S. ?? (New Old Stock?) I'm looking for Part Number C19704 (Heater Valve) for my 1965 3.8 'S'. I can't find it anywhere on planet Earth. Maybe you know of someone in Spain who might have an old-but-new one of those? Thanks for any help.


The reason I suggested White Post Restorations is because they can re-manufacture any part or system of any car, regardless of the condition, as long as they have something to go by. Yes they are expensive but their reputation is legendary.

But if you think that the New Brakes Servo can be adapted without any serious modification that would compromise the integrity of his car, then by all means, since he already has the part(s) in hand.

Ex
 
Vettedog,
I have used the later Lockheed 'diaphragm' servo in at least five 150's. I have been getting the one with the mounting bracket kit. It still has to be modified but it is a step in the right direction. There is no hesitation in braking that is evident in the original piston servos. I will not use anything sleeved in brass unless there is absolutely no other option.
Alan T
 
Thanks Exotexs
I contacted Apple Hydraulics first because they rebuilt a master cylinder for my TR6 and it has worked well for the past few years. But Apple via email said no way because Apple can not get the rebuild kits. They suggested the "new universal" servo.

On the other hand, Bill at White Post, via phone said they can and do rebuild the old oblong servos. The turn around is about 1 week and the cost is $470. You were dead on target.

I will attempt to build an adaptor plate for the "new universal" servo to fit up on the original bracket. If this works out nicely, I will go this route; otherwise, i will fork over the $470 to White Post.

Just for a reference, I see many of the servos for other cars go over the $1k mark. Guess I ought to be satisfied with Jag prices but now after examining the pistons I will need a new set but that is on another topic.

Happy 4th to all.
 
Well the price is a little more than I understood over the phone. I now find the servo repair/restoration is $470. The repair/restoration of the breather for the servo costs $90 and $250 to redo the master on the servo. Add a little freight and my boom-daggle for the modern servo and I will approach 1k. Glad I have new wheel cylinders and new disks on hand.

I find the 250 for the master a bit high, it that the going price to have the master re-sleeved?
 
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