PeteH Posted February 4, 2021 Report Share Posted February 4, 2021 Hi Actually, back in the 80`s. I drove a "Poo Brown" Dolomite (1800?) belonging to my Son. Don`t remember the brakes being any worse than some others. My "transport" back then was the (then "new") FWD Escourt. His Dolly was nicked and trashed on the Pirbright ranges. Co-incidently the Brand new, still boxed, Inertia seat belts intended for that car, but never fitted, are going in the Herald!. Pete Link to comment Share on other sites More sharing options...
68vitesse Posted February 4, 2021 Report Share Posted February 4, 2021 On 03/02/2021 at 08:07, PeteH said: I know we all try and "improve" our vehicles. I do however wonder where the line can be drawn?, over what is "too far"?. Probably more concerning would be "our" insurers attitude, to many of the more extreme modifications. Even if they are done in the principle of increasing safety?. Food for Thought?. Pete Usually under that much misused word "upgrade". Regards Paul Link to comment Share on other sites More sharing options...
chrisbladen Posted May 7, 2021 Report Share Posted May 7, 2021 On 01/02/2021 at 08:29, clive said: EDIT. Kits are available from under £50 now.... https://www.ebay.co.uk/itm/Powertune-Remote-Brake-Servo-LE72696-Brake-Booster-1-9-for-Triumph-TR3-4-4A-GT6/401711218234?hash=item5d87dabe3a:g:xB0AAOSwBZ5ca8~j Has anybody had any experience with the above kit on a 1500 spit? I was about to by the kit from david manners which is around £90 but if the above will be just as good but nearly half the price then its a no brainer. My only concern is the registered address for that seller is china so any issues with it then it may be a bit of hassle trying to get it sorted. Also does that particular one come with instructions? Thanks Link to comment Share on other sites More sharing options...
Clive Posted May 7, 2021 Report Share Posted May 7, 2021 40 minutes ago, chrisbladen said: Has anybody had any experience with the above kit on a 1500 spit? I was about to by the kit from david manners which is around £90 but if the above will be just as good but nearly half the price then its a no brainer. My only concern is the registered address for that seller is china so any issues with it then it may be a bit of hassle trying to get it sorted. Also does that particular one come with instructions? Thanks If it is a powertune one, then it is teh exact same one sold by most companies out there. I got mine from MGB Hive, they were the cheapest at the time. And I can reassure you they work perfectly. Had it on my Toledo for several years. Not sure what instructions you are after. The servo is generic, so nothing about where to put it on the car. I think it mentioned mounting at an angle, the in and out, plus how to connect the hose/one way valve. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 7, 2021 Report Share Posted May 7, 2021 +1 for clives post it is used as a one size fits all but clues on how/where are just not in the kit its look at as many installations you can find and copy how you wish it to fit the mounting bracket controls the inclination of the unit Pete Link to comment Share on other sites More sharing options...
dougbgt6 Posted May 7, 2021 Report Share Posted May 7, 2021 Mine came from China, the standard Lockheed type. Unfortunately It was poorly assembled, didn’t work. I had to strip it down, clear out airways clogged with grease and put on an external one way vacuum valve. OK after that. The additional bracket ensures the correct elevation and make sure you put in a LONG vacuum pipe which hangs low and gives a sump for fluid in the vacuum pipe. You don’t want fluid in the vacuum chamber! Doug 1 Link to comment Share on other sites More sharing options...
chrisbladen Posted May 12, 2021 Report Share Posted May 12, 2021 So my powertune servo came today without any instructions as i suspected, i should be able to find some online so i can ensure i am installing it at the correct angles etc. It came with a little black plastic nipple which im assuming is for the vaccum pipe? Does this need some sort of adapter to connnect to the manifold? Iv seen something online which is a 5/18 UNF thread, i take it il need one of these and also a non return valve for on the vaccum pipe? If anyone could send a few pictures of how you have done yours if any1s done one on a spitfire, then that would be a massive help Thanks Link to comment Share on other sites More sharing options...
johny Posted May 12, 2021 Report Share Posted May 12, 2021 Reckon that goes into the servo diaphragm tank so you just remove the bung, which is used to keep the interior clean and dry, and push it in. As you say the vac pipe coming from the manifold then connects on to it. As for the angle I thought the mounting bracket the kit comes with ensures its correct, well as long as its fitted to a horizontal surface of course... Link to comment Share on other sites More sharing options...
chrisbladen Posted May 12, 2021 Report Share Posted May 12, 2021 7 minutes ago, johny said: Reckon that goes into the servo diaphragm tank so you just remove the bung, which is used to keep the interior clean and dry, and push it in. As you say the vac pipe coming from the manifold then connects on to it. As for the angle I thought the mounting bracket the kit comes with ensures its correct, well as long as its fitted to a horizontal surface of course... Theres no bung on the servo tank mate it already has a connection for the vaccum pipe on the tank Link to comment Share on other sites More sharing options...
johny Posted May 12, 2021 Report Share Posted May 12, 2021 I think it must be an alternative one then, in case you want to connect at an angle - they are universal servos after all! Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 12, 2021 Report Share Posted May 12, 2021 the elbow/straight hose connector normally has an integral non return valve as std. give it a suck /blow to test it only works one way Pete Link to comment Share on other sites More sharing options...
chrisbladen Posted May 12, 2021 Report Share Posted May 12, 2021 Will do, anybody got any idea where to get the inlet manifold adaptor from to connect the other end of the hose? Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 12, 2021 Report Share Posted May 12, 2021 your after something like149487 https://www.canleyclassics.com/?catalogue=triumph-gt6-mkiii&diagram=triumph-gt6-mkiii-manifolds-and-pipes or air hose connectors which are available eg https://www.amazon.co.uk/Silverline-918523-Bayonet-Thread-Coupler/dp/B000LFYBF4/ref=sr_1_39?adgrpid=52597120549&dchild=1&gclid=EAIaIQobChMItI-poufE8AIV-v3VCh1GXQ0sEAAYAyAAEgLSYvD_BwE&hvadid=259071930454&hvdev=c&hvlocphy=9046046&hvnetw=g&hvqmt=e&hvrand=5115976284033420775&hvtargid=kwd-297165106024&hydadcr=29382_1700898&keywords=air+hose+adapter&qid=1620845310&sr=8-39 Pete Link to comment Share on other sites More sharing options...
johny Posted May 12, 2021 Report Share Posted May 12, 2021 Heres two on ebay, the first with a built in non return valve (recommendable as the plastic one with the servo can be unreliable), but theyre expensive for what they are and compared with the servo cost! https://www.ebay.co.uk/itm/223950754440?hash=item3424815288:g:m9UAAOSwrgFecrXk https://www.ebay.co.uk/itm/324107656285?hash=item4b76525c5d:g:acgAAOSw22ZecrG3 Link to comment Share on other sites More sharing options...
chrisbladen Posted May 12, 2021 Report Share Posted May 12, 2021 Thanks johnny, They am very expensive like you say in comparison to the cost of the whole servo kit. Pete, good idea with the air hose connector, they am usually a 1/4 thread arent they and the thread in the inlet manifold is 5/8 so i could get a reducer similar to this i suppose... https://www.thehosemaster.co.uk/bspp-male-60-cone-x-bspp-swivel-female-60-cone-adaptor/?gclid=CjwKCAjw-e2EBhAhEiwAJI5jgzat52uoPzu838LizcpzCRDdrM4l1Tgbc4-okBaYZx4Sp-Y7f0uhAxoCZ_gQAvD_BwE Link to comment Share on other sites More sharing options...
68vitesse Posted May 12, 2021 Report Share Posted May 12, 2021 I used a 16mm Banjo fitting on my Vitesse with a 5/8UNF banjo bolt I made. The second one is for the smiths valve. Regards Paul. Link to comment Share on other sites More sharing options...
GrahamB Posted May 12, 2021 Report Share Posted May 12, 2021 I have attached a copy of the instructions that I received with my servo. I have also attached a photo of my engine bay which shows, although not very clearly, the servo mounted next to the clutch master cylinder. The original brake pipe was just bent round to fit into the outlet of the servo and a short new pipe made up to connect the master cylinder to the servo. I hope that these are of some use. brake_servo.pdf Link to comment Share on other sites More sharing options...
chrisbladen Posted May 12, 2021 Report Share Posted May 12, 2021 Thanks for the help and advice guys. Graham, have you found it works ok without an inline non return valve? Also it says in the instuctions to create a U trap between the manifold and inline valve, i cant imagine this is going to be very easy with the limited space, is this absolutely necessary or is it just an additional fail safe? Link to comment Share on other sites More sharing options...
chrisbladen Posted May 12, 2021 Report Share Posted May 12, 2021 Iv found a few more links online if any one is having the same issues finding the fittings if it helps. Also alot cheaper than elsewhere Manifold adaptor https://www.psautoparts.co.uk/product/min-bh-brake-hydraulics/manifold-adaptor-5-8-unf-rbau2164/RBAU2164 Inline non return https://www.amazon.co.uk/dp/B07QPXX7TL/ref=cm_sw_r_wa_apa_glt_fabc_FCDZ74HCH31S4W7F0RVK?_encoding=UTF8&psc=1 Link to comment Share on other sites More sharing options...
68vitesse Posted May 12, 2021 Report Share Posted May 12, 2021 The inline non return valve is there so if the engine stops you will still get a couple of servo assisted brake applications. I don't have a u bent in my vacuum hose but did make sure some of it runs below the level of the servo connection to help prevent any fuel excetera getting into the servo. Regards Paul Link to comment Share on other sites More sharing options...
GrahamB Posted May 12, 2021 Report Share Posted May 12, 2021 I have no extra non return valve in the system, only the one incorporated in the connector at the servo end. Interestingly, this is a right angle connector , the same as the spare one that you received. I know that the valve works as you can actuate the brake pedal a few times with the engine stopped and feel, and hear, the servo operating. As you can see in the photo, the lowest point in the vacuum hose is where it rests on the rocker cover, after which it rises steeply to the servo. This has to serve as the U tube fluid trap and has not caused any problems over the years it has been fitted. After replacing the front brake callipers, it felt as though the system was not correctly bled. I thought that it was air in the servo unit so removed it from the circuit. Thanks to an item on the forum, I realised that it was because of the incorrect seal design. I used a reversed sash clamp between the brake pedal and the steering wheel to keep the system pressurised for a couple of days to "stretch" the seals and the system started to work satisfactorily. I therefore re-configured the hydraulics to bring the servo back into operation and noticed a significant improvement in that with the servo, I no longer had to brace myself against the seat in order to generate enough pressure to obtain the required retardation. Link to comment Share on other sites More sharing options...
Bob Owen Posted May 12, 2021 Author Report Share Posted May 12, 2021 Graham Your instructions state that Silicone fluid is not recommended--any idea why ? Link to comment Share on other sites More sharing options...
chrisbladen Posted May 12, 2021 Report Share Posted May 12, 2021 19 minutes ago, GrahamB said: After replacing the front brake callipers, it felt as though the system was not correctly bled. I thought that it was air in the servo unit so removed it from the circuit. Thanks to an item on the forum, I realised that it was because of the incorrect seal design. Do you mean there is an issue with the seals on the servo or elsewhere in the system? Only asking as i have also recently replaced my front calipers but i havent used it much on the road since to know if theres an issue. Just wandering if its worth me doing the few days pressuried as you did before i fit the servo? Link to comment Share on other sites More sharing options...
GrahamB Posted May 12, 2021 Report Share Posted May 12, 2021 I had not noticed the reference to silicone fluid, I do not know why it is not recommended; I use normal DOT4. May be just because they have not tested the system long term with silicone. The problem with the seals refers to the front callipers, not the servo. As always, Pete Lewis is the expert on the design of the calliper seals, the problems and the work arounds. Link to comment Share on other sites More sharing options...
johny Posted May 13, 2021 Report Share Posted May 13, 2021 yes I think we've agreed that as silicone shouldnt be used with ABS systems all brakes have been included in the same instruction. And apparently its not the seal but the machining of the seal housing that has caused problems so if it occurs it will be with new repro calipers. A few threads about both subjects on here... Link to comment Share on other sites More sharing options...
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