Type 5 1/2 servo dismantling

[Andrew1967]

Have been stripping the servo for the car for recondtioning ..

I think there is a piston and seal in the centre ... but seems stuck solid.

Questions are .. is it a piston and seal and then how do you get it out ??

[Dearg1275]

It is a piston and seal. It’s tempting to apply heat but that will fry the rubber and make a right mess. I screwed a self taping screw into the piston a tight as possible and soaked in releasing fluid for a day or so. Tapping gently with a light hammer can break the corrosion’s hold while twisting the screw with some vice grips has worked. Freeze thaw can help too. Leave it in the freezer over night then drop it in boiling water. Above all don’t get impatient as this piston is what works the air control valve and any damage to the bore is hard to recover.

D

[Andrew1967]

Thanks David
I thought it was a piston/seal and did try to turn a 1/4 UNF tap into it toggle some thread to try to shift it .. failed.
Has been on soak for a day so will try again and if not I'll try the freezer method.
Any idea where to get a kit from .. I messaged J & L but no reply to date .. would prefer a genuine kit really.

[Peter Laidler]

Same meat, different gravy to David above......... started to tap it to a UNF or BA thread to pull it out and after a couple of threads, all of a sudden, it started to turn with the tap. Left it full of penetrating oil for the afternoon and by the evening it pulled out.

On the seized one I did (above), that surface was totally fu........, er......., badly corroded. But polished it and assembled it using gasket sealant, put it under tremendous load and it's still perfect to this day

[1071bob]

The service manual for these is on the main site.

http://mk1-performance-conversions.co.u ... _servo.pdf

[Polarsilver]

Lockheed Servo Kit.JPG

Andrew .. Dunno if this helps or not but have this on my shelf .. Lockheed Servo Kit ,,not sure that it is complete but it might give you an idea of whats inside.

[Andrew1967]

Thanks for everyones useful posts

Norman, I think from a seal and gasket point of view its complete just missing a few odds and ends, lock tabs and bits that could be re-used I believe.

Is it the SSB1036 kit ?

[Dearg1275]

Andrew,

http://mk1-forum.net/viewtopic.php?f=6& ... &start=250

I think you remarked at the time that this might be useful.

7C3C8B06-C682-467D-80FD-C78394BF9734.jpeg

D

[Polarsilver]

Andrew . interesting that number you mention SSB1036 is just hand written on the end of the Lockheed Box however the printed on the box number shows up as .."100952 Diaphragm qty;one" .. presume its a genuine box as is also showing " Marketed by AP Banbury England" .

[Andrew1967]

I think the diaphragm was available separately so is probably that with the other parts put inside Norman

David, that is useful to see the 'kit of bits'

[InnoCooperExport]

I got mine out by soaking it in penetrating oil, good few squirts every so often, then blocking up all but one of the outlets and putting compressed air on it. They're not easy to get out and can be rusted in pretty solid.

[Peter Laidler]

Andy's original question is a good example of a querie raised a couple of months ago, regarding using brake fluid to lube the seals prior to assembly. Like Andy's servo, left for any length of time, open to the atmosphere and the corrosion sets in - as only brake fluid knows how!!!

Red rubber grease and silicon is the way to go