Austin Branson Posted May 23, 2020 Report Share Posted May 23, 2020 Greetings, oh sage ones. I had to replace my brake master cylinder and servo 4 or 5 years ago. Although the servo failed almost immediately, the brake cylinder seemed OK. Until Thursday. We’d been out to see friends, about 20 miles away. Returning home, about a mile from home, the brake pedal went straight to the floor. With pumping, I was able to recover a small amount of pressure. The following morning, the pedal seems fine again, but I have lost confidence in it. Can anyone suggest where I might get a good one, please? regards, Austin Quote Link to post Share on other sites
John Lewis Posted May 23, 2020 Report Share Posted May 23, 2020 I can understand your concern. Have you lost any fluid? Is there any sign of fluid around the master cylinder? Quote Link to post Share on other sites
Austin Branson Posted May 23, 2020 Author Report Share Posted May 23, 2020 Hello John, no to both those questions. I believe the problem is the ‘tipper’ valve. The cylinder was manufactured by TRW, and I recall reading somewhere that they had quality issues. Austin Quote Link to post Share on other sites
iani Posted May 23, 2020 Report Share Posted May 23, 2020 33 minutes ago, Austin Branson said: Hello John, no to both those questions. I believe the problem is the ‘tipper’ valve. The cylinder was manufactured by TRW, and I recall reading somewhere that they had quality issues. Austin They're garbage Austin, I had one behave the same way and returned it, better off getting an original m/cyl reconditioned. Quote Link to post Share on other sites
Austin Branson Posted May 23, 2020 Author Report Share Posted May 23, 2020 Hi Ian, any suggestions on where I might get an original unit? Regards, Austin Quote Link to post Share on other sites
Waldi Posted May 23, 2020 Report Share Posted May 23, 2020 Hi Austin, Ask Past Parts, they reconditioned mine. Waldi Quote Link to post Share on other sites
Austin Branson Posted May 23, 2020 Author Report Share Posted May 23, 2020 Just now, Waldi said: Hi Austin, Ask Past Parts, they reconditioned mine. Waldi Hi Waldi, unfortunately I don’t have an original unit to be reconditioned. Any ideas where I might get one? Regards, Austin Just now, Waldi said: Hi Austin, Ask Past Parts, they reconditioned mine. Waldi Quote Link to post Share on other sites
Waldi Posted May 23, 2020 Report Share Posted May 23, 2020 Hi Austin, I would just give them a call, or maybe someone has an old original for you? Waldi Quote Link to post Share on other sites
harlequin Posted May 23, 2020 Report Share Posted May 23, 2020 Austin Give TRGB a call, they have a massive loft full of used parts and I am sure I have seen a pile of master cylinders up there George Quote Link to post Share on other sites
Austin Branson Posted May 24, 2020 Author Report Share Posted May 24, 2020 Thanks guys for your help. I’ve found a m/c https://www.ebay.co.uk/itm/Triumph-TR5-TR6-original-Brake-Master-Cylinder/264739629713?_mwBanner=1&ul_ref=https%3A%2F%2Frover.ebay.com%2Frover%2F0%2Fe11051.m43.l1123%2F7%3Feuid%3D0a94fcecbc50409caa5a0aa313d12ad8%26bu%3D43020874950%26segname%3D11051%26crd%3D20200524002140%26osub%3D-1~1%26ch%3Dosgood%26loc%3Dhttps%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F264739629713%26sojTags%3Dbu%3Dbu%2Cch%3Dch%2Csegname%3Dsegname%2Ccrd%3Dcrd%2Curl%3Dloc%2Cosub%3Dosub%26srcrot%3De11051.m43.l1123%26rvr_id%3D0%26rvr_ts%3D45bffc961720a4d059419c8dfffccd75&ul_noapp=true&pageci=5750ad90-791d-4d64-bc22-655acd2a7098 On ebay, but the guy selling it is unable to guarantee that it is a genuine Lucas/Girling part. Is there an easy way to identify it? Thanks again, Austin Quote Link to post Share on other sites
TRseks Posted May 24, 2020 Report Share Posted May 24, 2020 I also have an interest in this, the one one the car which might be original or not was leaking so I tried new seals, still leaking so bought a new one, this also leaked so got a replacement, this has worked but leaked a little bit and then seemed to be ok, have used it for 4-5 years now but will get the original refurbished if I can get it confirmed that it’s actually an original part... Magnus Quote Link to post Share on other sites
iani Posted May 24, 2020 Report Share Posted May 24, 2020 14 hours ago, Austin Branson said: Hi Ian, any suggestions on where I might get an original unit? Regards, Austin I got mine from Conrad, he's on here as "Openroad" worth asking him. Quote Link to post Share on other sites
harlequin Posted May 24, 2020 Report Share Posted May 24, 2020 My original master cylinder (1972 vintage) started to leak some years ago so it was replaced with a new unit, this lasted a couple of years then I changed the brake pads and wheel cylinders, within 100 miles the master cylinder failed in a very big way! The reason I am told was the new parts altered the travel of the cylinder piston past its original stop point and because the material of the new cylinder is to soft there was a slight ridge at the old stop point which ruined the seal, I then bought another new cylinder which the vendor assured me was ok and the issue had been resolved, this started to leak after 4 or 5 thousand miles and of course this happened in the middle of France on the way home from a holiday. I now have the original 1972 cylinder back on the car after being refurbished by Past Parts with (touch wood) some 12 thousand miles and no problem. George Quote Link to post Share on other sites
Waldi Posted May 24, 2020 Report Share Posted May 24, 2020 Maybe PP can recondition repro items too? Worth asking. Waldi Quote Link to post Share on other sites
Austin Branson Posted May 24, 2020 Author Report Share Posted May 24, 2020 30 minutes ago, Waldi said: Maybe PP can recondition repro items too? Worth asking. Waldi Good idea. Quote Link to post Share on other sites
Austin Branson Posted June 17, 2020 Author Report Share Posted June 17, 2020 Hi guys, as Waldi suggested, I contacted Past Parts, and they will sleeve, refurbish and plate the exterior of my TRW m/c. I believe the cost is £130, not sure if that includes VAT. The problem for me is that I live in France. I posted the m/c on Monday May 25, but PP only received it last Thursday! That’s nearly 3 weeks. PP are quoting 3 weeks for their work, and then I’m probably going to hit another 3 weeks delay in the postal system. That’s a total of around 9 weeks. That’s most of my summer down the toilet. The other issue is cost - nearly £20 to send it, probably a similar cost for return. I guess the postal people have to cover their increased storage costs! Right, spleen vented. I’ll let you know how the m/c looks when it gets here. Thanks again for all your help and support. Austin Quote Link to post Share on other sites
ntc Posted June 17, 2020 Report Share Posted June 17, 2020 Austin It took some sorting these out the ones you buy today should be ok I know of others that have had problems with past parts so good luck Quote Link to post Share on other sites
Phil H 4 Posted June 17, 2020 Report Share Posted June 17, 2020 (edited) Had mine done recently by past parts, quoted 3 weeks ( I think this is a standard) but had a mc and servo both reconditioned and back in Just over a week. Guess it depends how busy they are. Hope your lucky. Edited June 17, 2020 by Phil H 4 Spelling Quote Link to post Share on other sites
Paul J Posted June 17, 2020 Report Share Posted June 17, 2020 There is an original listed on eBay for sale https://www.ebay.co.uk/myb/WatchListAdd?_trksid=p2047675.l1359&SubmitAction.AddToListVI=x&item=264765945996&rt=nc&srt=01000500000050d219965bad865a788c5d95ff4123b33021868f2824aa9431c1c293b893eb2f27694a708b99aa248ca859f5a07c8005cd90386cdaff360ab29606722aaf92995e1574cc28b739a53e056f5d4c4201513b&etn=Watch list&tagId=-99&ssPageName=VIP:watchlink:top:en&sourcePage=4340 Quote Link to post Share on other sites
Austin Branson Posted July 14, 2020 Author Report Share Posted July 14, 2020 Hello folks. I got the reconditioned cylinder back from Past Parts yesterday. Fitted it yesterday afternoon, and took it out for a spin, and there is still a problem. About one in ten depressions, and the pedal goes about an inch further than usual. Also, the reservoir is flooding, and forcing fluid out of the breather hole in the lid. I’ve just had a long conversation with Nigel, he thinks it might be something to do with the servo, and suggested lubricating the output shaft from servo with rubber grease at the seal. Can this be done without disconnecting the brake lines? I have rubbish knees, and bleeding brakes is difficult. Austin Quote Link to post Share on other sites
stuart Posted July 14, 2020 Report Share Posted July 14, 2020 32 minutes ago, Austin Branson said: Hello folks. I got the reconditioned cylinder back from Past Parts yesterday. Fitted it yesterday afternoon, and took it out for a spin, and there is still a problem. About one in ten depressions, and the pedal goes about an inch further than usual. Also, the reservoir is flooding, and forcing fluid out of the breather hole in the lid. I’ve just had a long conversation with Nigel, he thinks it might be something to do with the servo, and suggested lubricating the output shaft from servo with rubber grease at the seal. Can this be done without disconnecting the brake lines? I have rubbish knees, and bleeding brakes is difficult. Austin You can just unbolt the cylinder off the servo and theres enough give on the pipes to move it enough to get to the pushrod. Stuart. Quote Link to post Share on other sites
Waldi Posted July 14, 2020 Report Share Posted July 14, 2020 Hi Austin, have you checked the gap between the servo push rod and the cylinder piston? A simple test to increase the required clearance is to loosen the 2 bolts, fit some shims between MC and slave, like 1 mm thick, and test again. If this solves the issue, you need to check the clearance by removing the MC and measure (calculate) it. Waldi Quote Link to post Share on other sites
Keith66 Posted July 14, 2020 Report Share Posted July 14, 2020 Hi All Just reading through this one and noted the supposed quality problems of master cylinders but current ones were ok. I'd heard the same about servo units. So did i do the right thing by buying both new a few years ago as part of my resto. Have i fitted cheap junk when i should have refurbed the old stuff? One comment was they are ok now, so when were they ok from? Cheers Keith Quote Link to post Share on other sites
Waldi Posted July 14, 2020 Report Share Posted July 14, 2020 Hi Keith, I think it depends on the individual item you have bought. If the vendor still had a bunch of suspect items and did not want to scrap these, you may have a poor one. On the other hand, if your items are in service for a couple of years, it is less likely you will have an issue (bath curve principle). Cheers, Waldi Quote Link to post Share on other sites
Austin Branson Posted July 14, 2020 Author Report Share Posted July 14, 2020 3 hours ago, Waldi said: Hi Austin, have you checked the gap between the servo push rod and the cylinder piston? A simple test to increase the required clearance is to loosen the 2 bolts, fit some shims between MC and slave, like 1 mm thick, and test again. If this solves the issue, you need to check the clearance by removing the MC and measure (calculate) it. Waldi Hi Waldi, any idea what the clearance should be? The servo and master cylinder worked fine for several years. Austin Quote Link to post Share on other sites
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