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Nov 22, 2017 17:42:18 GMT
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Edit : see below for strip & rebuild guide  Hi, The brake fluid on my Hunter has been needing regular top-ups for a while now, with no obvious signs of leaking at the wheels or pipework. Yesteday I peered into the remote servo and found it was awash with - presumably - the missing brake fluid. I've never needed to work on servo before so any advice is welcome, I guess the obvious options are : find a good used one (can anyone help?) DIY repair of mine (parts + hassle, I think I've found a "major rebuild" kit for under £30 ) send mine away for repair ( £££ ) buy new or recon unit ( ££££+ ) This writeup gives some great advice and background info, DIY looks do'able (if I can get the parts) but splitting the old unit won't be easy  www.buckeyetriumphs.org/technical/Brakes/Servo/Servo.htmAll suggestions / ideas welcome !  Not the best photo but this shows the servo at the top right 
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Last Edit: Dec 2, 2017 15:25:12 GMT by nomad
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Nov 22, 2017 18:20:39 GMT
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I did a few on MGB's and Rovers and its really not that difficult looking at what you did to buildings, sheds ect.
On the site you refereed to, you see a tool (the thick plate with handlebars) what they fit to the threads of the brake servo housing to split the 2 halves. It is wise to make such a tool otherwise, you pull out the threaded peices out of the housing. With such a tool splitting is not really difficult. The rest is not too difficult too
Peter
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Nov 22, 2017 18:27:19 GMT
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If it's the Girling version servo try Northwest Classic for the parts if you want info on how to rebuild it message me and I will send you my number easier to talk you through it that right it all down.
I reconditioned the servo on my Mk3 sceptre not hard to do just complex.
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Nov 22, 2017 19:05:41 GMT
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It's not the servo that's the the problem...... the missing brake fluid is caused by the seals on the master cylinder failing and allowing it to leak into the servo.
Nick
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1967 Triumph Vitesse convertible (old friend)
1996 Audi A6 2.5 TDI Avant (still durability testing)
1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
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ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
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What Nick said. It's happened to me a few times in the past.
A new master cylinder should see you on your way and with improved braking.
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It's not the servo that's the the problem...... the missing brake fluid is caused by the seals on the master cylinder failing and allowing it to leak into the servo. ^ Top answer - I opened the servo and found about a pint of brake fluid inside  We have progress, and most of it is good  I bought a servo rebuild kit from Eb@y seller Greenwood, exactly what I needed apart from the large seal which is the wrong size. Not a problem but for info - Hunter Estate Lockheed servos are larger than Lockheed 7" servos Spot the difference   Photos - showing helpful sizes - from the Eb@y advert (credit to Greenwood for the images) img.retro-rides.org/i/v/nomad/4d2dcb77022a.jpgimg.retro-rides.org/i/v/nomad/dc56316e48e6.jpgimg.retro-rides.org/i/v/nomad/d4e696ae1d6e.jpg |
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Remove the servo - very simple, just 1/2" bolts (3 inside the car, 1 on the bulkhead clamp), then disconnect both brake pipes. Undo the bolt holding the clamping ring to split the servo, Note. Most other servos "twist" together and are difficult to split ! img.retro-rides.org/i/v/nomad/33e3d5a31cff.jpgRemove the large rubber diaphragm, you can then remove the forked "key" that holds the large plastic disk onto the shaft. Tip : turn the unit so the key is at the bottom of the disk, press the large disk to compress the spring.  Remove the 3 bolts holding the master cylinder onto the servo casing. Pull the shaft out of the cylindr (it may be stuck - use short sharp tugs) Check the cylinder bore carefully, if worn/pitted/scored consider finding a different servo !Old seals alongside the rebuilt shaft (note both rubber seals have "lips" and need to be fitted the right way around )  Closeup showing the "hidden" pin that holds everything together img.retro-rides.org/i/v/nomad/409b80605cd5.jpgLube the cylinder with new brake fluid and fit the rebuilt shaft. Fit 3 bolts (with locking plates) holding cylinder to the servo casing Fit the large spring / large black disk, and fit the key to hold it all together. - work the assembly a frew times to check it moves freely. Fit the large rubber seal then clamp both halves of the servo together. New bits before re-assembly img.retro-rides.org/i/v/nomad/19708401d47b.jpgDone, ready to refit  |
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Last Edit: Dec 2, 2017 15:27:21 GMT by nomad
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