Although I fully realize the pin - spanner is the proper way to tighten / loosen the collet , I have never , ever had a flywheel come loose , or damaged a piston or rod . Most times you can also use the proper number drill blank in a conventional flywheel configuration to accomplish this task . I will be making a proper spanner for my EVOS ..I have 7 of the darn things !!!!! :lol: :lol: :lol:Been useing type B for years never had a fly wheel or coupling come loose, And also very easy to tighten or loosen. I would never tighten or undo with any thing through the exhaust with even wood or plastic simply because its only stopping the piston from going up on the exhaust side, Their for when you tighten or loosen the flywheel your trying to tilt the piston and putting a lot of strain on the piston. This is also why fly wheels probably come undone because you cannot get the same level of tightness as with the proper tool. Also if you need to put loctite on to stop it coming undone then their is something wrong with the matching tapers on the collet and fly wheel. I know a lot of commercial collets and fly wheel tapers simply dont match each other, These tapers have to be exactly the same angles and i mean the same. When they are the same taper even after removing the coupling or nut they are unbelievably tight just through the perfectly matched tapers. Ive always made my own collets and fly wheels not just to have correct tapers but i also need particular sizes to fit in my models. When i make a fly wheel i always make the collet for that particular fly wheel at the same time so that i know the angle is right for the two ( top slide angle set and unaltered so you have the perfect angle for the two) Regards Martin.
thank you tyler i will try the spanner wrench,shaneThe best way is to use a pin spanner wrench on the flywheel. That is what those holes are for. McMaster has them or its is simple to use some steel or stainless wire are bend yourself a pair. Look at the pic attached. Letter D.
O.S. also makes a very nice Delrin piston stock tool which locks the con rod in place via a slot in the fixture which fits through the rear of the case.
look here:http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXMW34&P=7
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