Gadge-it Posted October 30, 2013 Report Share Posted October 30, 2013 Hi my clutches biting point is very low to the bottom check the levels there fine, bleed it just to on the safe side but still the same,has anybody got any idea's Quote Link to comment Share on other sites More sharing options...
aga man Posted October 30, 2013 Report Share Posted October 30, 2013 my bet would be the slave cylinder but i would get the slave and master changed and new fluid. could be as simple as replacing the fluid but i would suspect the slave /master cylinder. what vehicle is it btw? Quote Link to comment Share on other sites More sharing options...
Albert 888 Posted October 30, 2013 Report Share Posted October 30, 2013 Had the same symptoms on my gaylander. Clutch was goosed and found the shaft going into gearbox that operates the clutch very tight try some lube around the seal area if similar. Quote Link to comment Share on other sites More sharing options...
Paul223 Posted October 30, 2013 Report Share Posted October 30, 2013 Vehicle? Quote Link to comment Share on other sites More sharing options...
DannyNCC Posted October 30, 2013 Report Share Posted October 30, 2013 Put it in 4th handbrake on Rev to 2500rpm Lift clutch quickly pretty much all the way out If it just revs it's goosed Quote Link to comment Share on other sites More sharing options...
beerdeor Posted October 30, 2013 Report Share Posted October 30, 2013 Put it in 4th handbrake on Rev to 2500rpm Lift clutch quickly pretty much all the way out If it just revs it's goosed This is terrible advice Quote Link to comment Share on other sites More sharing options...
Paul223 Posted October 30, 2013 Report Share Posted October 30, 2013 Indeed Quote Link to comment Share on other sites More sharing options...
Gadge-it Posted October 30, 2013 Author Report Share Posted October 30, 2013 my bet would be the slave cylinder but i would get the slave and master changed and new fluid. could be as simple as replacing the fluid but i would suspect the slave /master cylinder. what vehicle is it btw? its a isuzu trooper Quote Link to comment Share on other sites More sharing options...
Tam Posted October 30, 2013 Report Share Posted October 30, 2013 Put it in 4th handbrake on Rev to 2500rpm Lift clutch quickly pretty much all the way out If it just revs it's goosed Same as above but release slowly at tickover & truck should stall if clutch is OK Quote Link to comment Share on other sites More sharing options...
Gunnerbob Posted October 30, 2013 Report Share Posted October 30, 2013 If you pump the pedal, do things improve? if so ,air in the system, could be slave cyl. seals, master cyl. seals, check around both for leaks also see if level has dropped in the reservoir.. Quote Link to comment Share on other sites More sharing options...
Paul223 Posted October 30, 2013 Report Share Posted October 30, 2013 If the slave cylinder was failing you'd have a fluid leak My guess is the master cylinder is failing, is / was the fluid black with rubber contamination? If the fiction plate was worn out then generally the pedal would be high with the slightest touch causing it to slip Quote Link to comment Share on other sites More sharing options...
aga man Posted October 30, 2013 Report Share Posted October 30, 2013 its a isuzu trooper i would still say the hydraulics slave/master cylinder. the test of selecting a high gear and releasing the clutch with the handbrake on will only prove the clucth might be close to slipping and as paul223 says the biting point would be high. the seals in cylinder can let by with no fluid loss. replacing the cylinders and fluid is far cheaper than removing the gearbox etc. Quote Link to comment Share on other sites More sharing options...
Paul223 Posted October 30, 2013 Report Share Posted October 30, 2013 (edited) The other options would be a release bearing or fork failing or a pedal push rod adjuster which has come loose and wound itself off Check the push rod first to see if it is adjustable, if it is then adjust so it only has a 1/16 of an inch free play, with the pedal up Then check the slave cylinder movement against the master cylinder, if your getting loads of movement on the pedal before the slave moves try a new master cylinder, if the slave is moving with the master and your getting good extended travel then it's box out time Edited October 30, 2013 by Paul223 Quote Link to comment Share on other sites More sharing options...
Paul223 Posted October 30, 2013 Report Share Posted October 30, 2013 i would still say the hydraulics slave/master cylinder. the test of selecting a high gear and releasing the clutch with the handbrake on will only prove the clucth might be close to slipping and as paul223 says the biting point would be high. the seals in cylinder can let by with no fluid loss. replacing the cylinders and fluid is far cheaper than removing the gearbox etc.Leaking slave will eventually vent past the dust boot, the master cylinder will leak past the seal into the reservoir turning the fluid black or leaving a black soot like deposit, there's a second seal to stop it venting so very often no leak to be seen Quote Link to comment Share on other sites More sharing options...
aga man Posted October 30, 2013 Report Share Posted October 30, 2013 fair play to you paul223 you definately seem to know your stuff. threads like this must drive you mad! i bet you wish you could look at the vehicle symptoms your self. Quote Link to comment Share on other sites More sharing options...
Paul223 Posted October 30, 2013 Report Share Posted October 30, 2013 It's all about correct diagnosis, that's why I'd try to offer a few scenarios and tell tale signs Quote Link to comment Share on other sites More sharing options...
NIGHT SEARCHER Posted October 30, 2013 Report Share Posted October 30, 2013 What sort of mileage has it done. Clutches are usually finished 130 to 150.000 miles. It could be the clutch fork arm bent. Discos suffer that problem badly. I have had vehicles come in with low clutch peddle and on stripping them down. I have found that the clutch plate so badly worn that it was braking up and dragging. Causing a very low peddle and crunching going in to reverse. Has Paul223 says its all about getting the right diagnosis. Loads of very good advice above. Good luck. Russ. Quote Link to comment Share on other sites More sharing options...
Gadge-it Posted October 31, 2013 Author Report Share Posted October 31, 2013 If the slave cylinder was failing you'd have a fluid leak My guess is the master cylinder is failing, is / was the fluid black with rubber contamination? If the fiction plate was worn out then generally the pedal would be high with the slightest touch causing it to slip The fluid was dark not sure about the contamination Quote Link to comment Share on other sites More sharing options...
Gadge-it Posted October 31, 2013 Author Report Share Posted October 31, 2013 What sort of mileage has it done. Clutches are usually finished 130 to 150.000 miles. It could be the clutch fork arm bent. Discos suffer that problem badly. I have had vehicles come in with low clutch peddle and on stripping them down. I have found that the clutch plate so badly worn that it was braking up and dragging. Causing a very low peddle and crunching going in to reverse. Has Paul223 says its all about getting the right diagnosis. Loads of very good advice above. Good luck. Russ. its got 140000 miles on but its got no crunching I,ve just been onto milner 4x4 and a price for slave is only £15 so i think i,ll go with that first. It's all about correct diagnosis, that's why I'd try to offer a few scenarios and tell tale signs Thanks for the imfor paul223 Quote Link to comment Share on other sites More sharing options...
Paul223 Posted October 31, 2013 Report Share Posted October 31, 2013 its got 140000 miles on but its got no crunching I,ve just been onto milner 4x4 and a price for slave is only £15 so i think i,ll go with that first. Thanks for the imfor paul223 I'd price the master first, the black fluid indicates the rubber seal has perished Quote Link to comment Share on other sites More sharing options...
alfa taf Posted October 31, 2013 Report Share Posted October 31, 2013 Same as above but release slowly at tickover & truck should stall if clutch is OK A much better advice. Quote Link to comment Share on other sites More sharing options...
Gadge-it Posted November 1, 2013 Author Report Share Posted November 1, 2013 If you pump the pedal, do things improve? if so ,air in the system, could be slave cyl. seals, master cyl. seals, check around both for leaks also see if level has dropped in the reservoir.. it dosent improve on pumping the pedal A much better advice. Tryed that today put it in 4th rev it and it stalled Quote Link to comment Share on other sites More sharing options...
Paul223 Posted November 1, 2013 Report Share Posted November 1, 2013 Have you tried a master cylinder as yet? Quote Link to comment Share on other sites More sharing options...
Gadge-it Posted November 2, 2013 Author Report Share Posted November 2, 2013 Ive got it booked in on Wednesday Quote Link to comment Share on other sites More sharing options...
DannyNCC Posted November 6, 2013 Report Share Posted November 6, 2013 This is terrible advice How's it bad advice If the clutch is slipping this will prove it Are you experienced in this subject??? Quote Link to comment Share on other sites More sharing options...
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