Vixen S3 Brake Servo - What Part Is It

[Moto]

My brake servo started sucking air yesterday and the brake pedal lost assistance, so guessing the diaphram has failed.

I presume the servo is the TR6 unit but can anyone confirm or otherwise. My Vixen is a late S3.

Moto

[Fishermt]

Hi

John Upham lists the servo as:

Servo or Spitfire mk.4/1500, LG 64068822 S2/3/4
``Supervac'' TR6

The part number doesn't seem to be correct and brings up a TR5 / TR6 master cylinder but I guess the source for the brake servo TR6 or Spitfire MK4/1500 may be correct..

http://www.team.net/html/british-cars/1991-01/msg0...

KRs
Marc

[Jerry-nsnl3]

I bought a TR6 brake servo from Moss for my S3 Vixen rebuild, based on the same info as offered here and it matched the removed original and all fitted up OK.
I also followed advice seen elsewhere, cutting a new plastic kitchen chopping board down to replace the original spacer made which had been made from chipboard and will obviously stand the test of time much better.

[Moto]

Thanks for the info.

I've ordered the TR6 unit (P/N 218072) so fingers crossed will fit OK. I don't have a spacer fitted currently so shouldn't need to put one in.

I'll post next week to confirm whether this P/N is correct so PH'ers can reference it for the future.

Moto

[Moto]

Yes this is the correct P/N for a replacement servo from a TR6.

A straight forward swap and all working OK again.

The only real challenge was undo'ing one of the 4 nuts behind the foot pedals as access was so tight and the arc of the spanner extremely limited.

Moto

[Fishermt]

That's good top know.

Marc

[Moto]

FWIW the unit I purchased was from a Triumph specialist TD Fitchett. They have a small number of brand new 'old stock' units which I understand to be original items rather than repro's.

https://www.ebay.co.uk/itm/115170801227

Moto