adriantr4 Posted April 15 Report Posted April 15 Hi I have completed engine and gearbox work with both out of the car, TR4. I have a new pressure cover, clutch plate, release bearing & carrier, fork, pin (and cross-drilled the operating shaft for a roll pin), There was a bit of damage, so plenty of new parts. All the new parts fit well, and I confess to having work done to convert to a 4A clutch system. Principally I shortened the gearbox extension and had the flywheel redrilled and lightened. No issues, and the gearbox attached to the engine without too much bother, before which we re-checked bearing free to move and clutch plate the right way round. We then attempted to activate the clutch by putting a stilson on the clutch arm - but once the bearing made contact we could not move it further. The amount of force to do so seemed like something would break? My friend who was doing the work with me "helping" was a professional mechanic and has been around TR's for years. He said when he put a 4a clutch in he was able to activate/test it with a bit of bar quite easily. I don't know the make of the clutch plate or cover: the clutch plate has "Flywheel Side" in both English and German, and maybe "ap" as a logo, nothing obvious on the cover. Any ideas? My friend thinks the cover is faulty, jammed? How much pressure is normal? Thanks, Adrian Quote
stuart Posted April 15 Report Posted April 15 When you fitted the box did you wire the lower end of the clutch arm in the forward position? i.e. the thrust bearing being held at the rear of the extension. Stuart. Quote
adriantr4 Posted April 15 Author Report Posted April 15 No we didn't, but I 'm fairly sure the clutch arm was ok, hanging vertical & not jammed. Thanks. Quote
Chilliman Posted April 15 Report Posted April 15 You'd be surprised just how much force you would need to do what you're describing on a new diaphragm pressure plate. Quote
adriantr4 Posted April 15 Author Report Posted April 15 Very true, and thanks. Any idea the pressure required - and any idea how to ID the parts? Quote
Z320 Posted April 15 Report Posted April 15 (edited) Hi Adrian, your "ap" clutch cover was also sold as Borg&Beck, which is the UK badge of "ap" (Automotice Products / USA). There is a old and a new design, the new one has the noticable stronger diaphragm spring, much stronger than your old TR4 "9 coil springs" - cover. Anyway, if you feel it is absolutly stiff, there could be something wrong. In my opinion the cover can't "jam" Ciao, Marco Edited April 15 by Z320 Quote
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