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| From Zero 250611 |
So new bigger master cylinder in (can see in the photo how much bigger the new one is), while the engine was out we checked carefully that we were getting full travel on the slave cylinder. I pushed slowly on the pedal while Mike held the thrust bearing pushed back as far as it would go. The full 1 inch of travel was achieved with the pedal on its highest ratio (there's three holes drilled to allow us to vary the pedal ratio). We thought we'd need to get more extension against the clutch cover to spaced out the cylinder with a few washers. Engine back in, still no luck disengaging clutch. Pushed pedal again and 'POP', fluid all over the floor... No option for it but to get engine out. How depressing.
With the engine out it seemed the slave had only slightly over-extended and pushed fluid out as the slave cylinder had gone back into the slave housing. Then after a bit of searching on Locost Builders I thought I'd take another look at the clutch plate. It had witness marks around the outside of the splined bit, it seems the fixed guide tube in the slave was permanently holding the friction disc hard against the flywheel. Some measurements taken, and without the washers we just added, there was only 0.3mm clearance between guide tube and cluth plate...
So, the spacer we had made is too thick. Looking at the clutch cover plate, the pressure ring can only come out 4mm, so we thought we'd skim 4.5mm off the spacer to give a bit of clearance. Just trying to track down a local lathe person today then hopefull we'll be back in business.
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| From Zero 250611 |
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| From Zero 250611 |
Green arrows show depth of plate from finger. Engine face to fingers = 60mm, fingers to plate = 19.3, so engine face to plate = 60-19.3= 40.7
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| From Zero 250611 |
This gives just 0.3mm clearance.
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| From Zero 250611 |
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