Girling Servo Mk 2b refurbishment

[Ian J]

I'm in the process of rebuilding the brake servo on my 1973 Elan +2 . I believe its a Girling Mk 2 b. Does anyone have a detailed assembly diagram for a Mk2 B they can send me or know where I can get one from.
The main problem I have is knowing where the ball bearing should go?
Any advice would be much apricated.

[TeeJay]

The main problem I have is knowing where the ball bearing should go?

Ian, see page 5, item 17 is the ball bearing.
Edit. The full document file size is to large to attach, so I have at present uploaded page 5.
Can upload more pages if requested.

Servo Unit MK 11B.pdf

(580.43 KiB) Downloaded 317 times

[TeeJay]

I have removed from the document details re the Girling Servo MK11A.

Then break it down into 3 uploads, messy.
Not sure how long the uploads have been limiited to 2,000KB?

Girling Servo MK11B_a.pdf

(1.87 MiB) Downloaded 369 times

[TeeJay]

Section b.

Girling Servo MK11B_b.pdf

(1.52 MiB) Downloaded 229 times

[TeeJay]

Section c

Girling Servo MK11B_c.pdf

(557.5 KiB) Downloaded 220 times

[Ian J]

Thanks that's been really helpful., The pdf was particularly useful and as you said it clearly shows the ball bearing. I think I'll video reassembling the servo and post it on my YouTube channel to hopefully help others in the same predicament.

https://youtu.be/IHf_hvjubu8

[TeeJay]

I think I'll video reassembling the servo and post it on my YouTube channel to hopefully help others in the same predicament.

Ian.
There are other YouTube Videos about the rebuild of the Girling Servo, but mainly about the MK2a.
One is 1 hour long by Jerry Christopherson, fitted to a Tiger/Alpine and at the begining there is a very useful illustration on how the servo works.

Link:- https://www.youtube.com/watch?v=quRJ4_sqMYU&t=912s

The other is a series of 6 videos by greasemonkeygarage watson, fitted to a Triumph GT6

As you know, if you go onto the YouTube website home page and input "Girling Servo" into thier search bar, you will find these videos and others about Brake Caliper and Master Cylinder Rebuilds.

Before I rebuilt my MK2a, some years ago, I watched all of these and was most thankful for the efforts the gents put in, to upload their videos.
Well I was retired, so had the time.
But there is an opportunity for you to complement these, perhaps with a shorter video.

I have had a request to attach the MK2a documentation, so I have attached one, which in my opinion, is perhaps more informative. It also gives dimensions of a tool used to remove a piston. I made mine from a wire coat hanger.

Girling Servo MK2a_1.pdf

(1.17 MiB) Downloaded 267 times

Girling Servo MK2a_2.pdf

(1.4 MiB) Downloaded 255 times

[1963 S1]

Thank you, Trevor, for sharing the details on the Mk2a servo.

[alan.barker]

Hi Ian,
i had a 1973 +2S130 and i bought a service kit for the Brake Servo.
I stripped it down and fitted the Kit and was well pleased with the result.
The Kit was not cheap but cheaper than buying a new Brake Servo. Also it stayed original.
The trickiest bit was getting the Piston out without damaging the Bore. Squirt in lots of Oil and don't use Screw Drivers or metal things to remove Piston. Gentle tapping on a block of wood and the Piston will come out.
Have fun
Alan