mcc1979ian Posted September 19, 2016 Share Posted September 19, 2016 Evenin fellas. Yesterday my 1986 300tdi/lt77 90 took another turn. Went into reverse no probs then when I went to go forward the clutch pressure just dissapeared completely and she wouldn't engage gears. Got it into second with engine off, cranked it over and home I drove sliding through the gears relitivley easy. Iv checked today and find the copper clutch pipe from the master is fine, the flexi is ok and the hard pipe is fine. She left a pool of fluid when it happened and when I checked the master cylinder was empty. Could this be something simple like my ****part slave cylinder or am I looking at having to pull the box out again? Quote Link to comment Share on other sites More sharing options...
Puffernutter Posted September 19, 2016 Share Posted September 19, 2016 Generally experience has shown that if you replace one part (master or slave) the un-replaced part will then quickly fail! It could be the master having failed with a new slave, there is potentially more pressure which puts extra stress on the seals that quickly expire (and vice-versa). Just my 2d and experience! Cheers Peter Quote Link to comment Share on other sites More sharing options...
Cornish Rattler Posted September 19, 2016 Share Posted September 19, 2016 It sounds like the slave cylinder has died but I would replace both the slave cylinder and master cylinder aswell Quote Link to comment Share on other sites More sharing options...
mcc1979ian Posted September 19, 2016 Author Share Posted September 19, 2016 Cheers. It had new master and slave just over a month ago but before replacing the master i had black fluid coming out the slave. Maybe thats damaged the seals. Will order a slave for now and this time it wont be Britpart Quote Link to comment Share on other sites More sharing options...
Snagger Posted September 20, 2016 Share Posted September 20, 2016 The black in the fluid is rubber particles from the seals. The flexible hose also breaks down over time. Tdis have very weak clutch forks, so it's possible the pivot ball has punched through the fork's pivot point and the slave has overextended, popping the piston out of the bore. That is the worst case scenario. You'll be able to tell as soon as you remove the slave cylinder. If the piston is still inside the cylinder, then it's just likely to be the seal and possibly a scored bore. Quote Link to comment Share on other sites More sharing options...
reb78 Posted September 20, 2016 Share Posted September 20, 2016 I suspect the word britpart highlights your main problem. Personally, I'd just replace the slave with a decent brand and see how you go (providing the pin hasnt punched through as Snagger describes) Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted September 20, 2016 Share Posted September 20, 2016 I had a Britpart brake master fail on me while bleeding the brakes -I was desperate, but even then I had no inkling just how bad they were, I don't use anything BP unless it is a really simple item. Quote Link to comment Share on other sites More sharing options...
qwakers Posted September 20, 2016 Share Posted September 20, 2016 i will only buy 3 things from britpart.. 1) tubes of one shot. they cant get that wrong... 2) brake calipers. they are actually really well made! 3) cv joints. they have been independently tested as almost as strong as ashcrofts and far better than genuine. Quote Link to comment Share on other sites More sharing options...
Snagger Posted September 20, 2016 Share Posted September 20, 2016 I missed the Britpart comment. Britpart hydraulics are notoriously bad, and I think they're lethal. They supply a handful of reliably good parts, but the list is short. I agree with the CV joints, having had some. I would be too afraid to try their calipers, having seen their other hydraulic components. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted September 20, 2016 Share Posted September 20, 2016 I've got a Britpart master cylinder. Not through choice. I needed one in Spain last week and ordered one from a local motor factors. Britpart is what arrived. Given my predicament I wasn't really in a position to turn it down. Nowhere is safe from the scourge. To add insult to injury it cost 54 Euros as well, far in excess of its 54p value. I'm curious to see how long it lasts. I'll be carrying spares from now on. Mo Quote Link to comment Share on other sites More sharing options...
mcc1979ian Posted September 21, 2016 Author Share Posted September 21, 2016 Removed the slave and the pistons still inside so iv a replacement on the way. Fingers crossed thats the fault and i dont need to drop the box. Being harvest time i get a few hours now and again to do anything so not having to drop the box would really suit me right now. Fingers crossed. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted September 22, 2016 Share Posted September 22, 2016 Did you accidentally pull the piston out when you removed the slave or was it out already? Les Quote Link to comment Share on other sites More sharing options...
Snagger Posted September 22, 2016 Share Posted September 22, 2016 I think he means the piston is still in the slave rather than the vehicle, but may be wrong. To satisfy my curiosity, when you have time, please remove the piston and tell us what you find inside - swarf, porous casting or rough machining are all Britpart favourite games on hydraulic cylinders. Quote Link to comment Share on other sites More sharing options...
mcc1979ian Posted September 24, 2016 Author Share Posted September 24, 2016 Will do. Should get back at it tommorrow Quote Link to comment Share on other sites More sharing options...
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