Perfect 65 Posted December 21, 2013 Share Posted December 21, 2013 My 1500 Spit has a diaphragm clutch I believe. The car has been off road for a few years and when I filled and bled out the clutch system using all new parts on the hydraulic side it was stuck. I chocked the pedal overnight and next day it eventually freed up. It now works ok up to a point with gears sliding in and out silently but there seems to be quite short travel from floor to 'bite'. Is this a characteristic of the diaphragm clutch? - DavePs. just read another thread and there was mention of 2 different piston sizes for the slave cylinder. Could I have received the wrong slave when I purchased my parts? Quote Link to comment Share on other sites More sharing options...
Velocita Rosso Posted December 21, 2013 Share Posted December 21, 2013 Lots of threads on this if you search backThe prime culprit is the holding of the slave in the bell housingIt may just need moving forward by undoing the pinch bolt and sliding forward to take up play Quote Link to comment Share on other sites More sharing options...
lancepar Posted December 21, 2013 Share Posted December 21, 2013 And ensure there is a pedal return spring in place 8) Quote Link to comment Share on other sites More sharing options...
Perfect 65 Posted December 22, 2013 Author Share Posted December 22, 2013 Yes got pedal spring in place and had a look for some reference to piston size in the threads, other than there are two different diameters, but no joy. So many threads but no actual piston size. Would like to eliminate this possibility while carrying out the other checks I have read about on this site. Could also be a small amount of air in the slave after bleeding due to inclination of the engine - will check this also. Regret ditching or mis-laying the old slave to use as a comparison. Thanks for your comments so far. Quote Link to comment Share on other sites More sharing options...
Velocita Rosso Posted December 22, 2013 Share Posted December 22, 2013 4359 wrote:Yes got pedal spring in place and had a look for some reference to piston size in the threads, other than there are two different diameters, but no joy. So many threads but no actual piston size. Would like to eliminate this possibility while carrying out the other checks I have read about on this site. Could also be a small amount of air in the slave after bleeding due to inclination of the engine - will check this also. Regret ditching or mis-laying the old slave to use as a comparison. Thanks for your comments so far. ...and make sure the bleed nipple is at the top Quote Link to comment Share on other sites More sharing options...
Perfect 65 Posted December 27, 2013 Author Share Posted December 27, 2013 4359 wrote:My 1500 Spit has a diaphragm clutch I believe. The car has been off road for a few years and when I filled and bled out the clutch system using all new parts on the hydraulic side it was stuck. I chocked the pedal overnight and next day it eventually freed up. It now works ok up to a point with gears sliding in and out silently but there seems to be quite short travel from floor to 'bite'. Is this a characteristic of the diaphragm clutch? - DavePs. just read another thread and there was mention of 2 different piston sizes for the slave cylinder. Could I have received the wrong slave when I purchased my parts? Just found the info on slave cylinder piston diameter on Rimmer Bros. parts list - the 1500 with diaphragm clutch has a 7/8" diameter piston. When I next get to the car I will run through all the tips gleaned here and check the slave cylinder piston diameter. However, if I have the wrong slave, ie 3/4" piston, the lift would be greater and not less so I dont think mine is wrong. Also, bleed nipple is at the top. Quote Link to comment Share on other sites More sharing options...
nang Posted December 27, 2013 Share Posted December 27, 2013 Also check linkages and pivot points on the pedal to master cylinder etc. A little bit of wear here transmits to quite a lot of lost travel.Tony. Quote Link to comment Share on other sites More sharing options...
herald948 Posted December 29, 2013 Share Posted December 29, 2013 It's also possible that the engine thrust washers are severely worn (or even now sitting in the oil pan), allowing a great deal of fore-and-aft movement of the crankshaft, which would affect clutch disengagement. I certainly hope I'm wrong on this one, though! ??) Quote Link to comment Share on other sites More sharing options...
rotoflex Posted December 30, 2013 Share Posted December 30, 2013 It seems like you'd be able to check the thrust washer wear/absence by grabbing the front crankshaft pulley & pushing/pulling in & out of the block. There was approximately 1/4" of movement as the result of the thrust washers falling out. Quote Link to comment Share on other sites More sharing options...
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