flywheel wire tied?

oldspert

oldspert

Senior Member
Was getting to install my clutch pressure plate and noticed the flywheel bolts are not wired. Is this necessary and if so what kind of wire is used? Aircraft certified?
Ed
 
I'm not sure it is necessary since the advent of Loc-Tite. It looks good to anybody opening it up next time.
 
Do not use lock washers as the heads of the bolts will stick out too far and interfere with the clutch disk. If you use grade 5 or 8 bolts of the proper length and toque to 65 foot-pounds you do not need the lock wires. To be safe (belt and suspenders) use the Loctite. Make sure the bolts are not too long.
 
If the bolts are too long, they will crack the rear main bearing. Safety wire is the surest way of preventing the bolts from working out, and it is simple /easy to apply.
 
nkaminar said:
Do not use lock washers as the heads of the bolts will stick out too far and interfere with the clutch disk. .
Click to expand...

I haven't removed any of the bolts yet to see if there are washers under them. The only thing I see is the dowel retainer ring. I will check the torque to make sure the bolts are tight.
Ed
 
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oldspert, Before you torque the bolts, make sure they are grade 5 (3 radial lines) or better still grade 8 (6 radial lines). If you replace the bolts, do not use ones that are longer than the ones you took out. See comment by Bob Bidonde, post #4. Unless the bolts are really short, in which case, measure the depth of the hole. Somewhere there is a specification on how long the bolts should be, maybe in the Red Book or the drawing that Jim Mason provided, post #7 (a readable copy).
 
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