> My TR4A developed a slight knock at low revs. On close inspection I
> could see the harmonic balancer turning in an "elliptical" fashion. I
> stopped the engine and grabbed ahold of the fan, and it was loose!
> So tomorrow I will pull the radiator (I have a 8 blade yellow fan)
> and tighten it all down. When I looked through the manuals for torque
> specs I couldn't find one.
>
> I'd imagine it'd be the same for all 4 cylinder TRactor engines. Any
> insight?
If the "harmonic balancer" aka pulley (TRactor motors use the fan for a
harmonic dampener and don't need a balancer) was wobbling, then you are
going to need to do more than just tighten bolts. Chances are good that
both the pulley hub and the crank nose are damaged. The hub & Woodruff key
can be replaced, but the crank is a bit harder to change. Loctite makes a
product for this purpose, called something like "circular parts mount" and
capable of filling gaps of up to .010".
Sorry I don't recall the torques offhand, but I think they're standard for
the size bolts involved. (1/4" for the fan and something like 3/4" for the
hub/extension to crank.)
Randall
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