Randall Young wrote:
>>Unless someone can bring new information to the table, I think my
>>options are
>>to pick either .003" which is too tight or .008" which is too loose.
>
>
> Get some fairly fine sandpaper (300 wet or dry should do, use it wet), lay
> it on a flat surface (MDF or a sheet of glass) and dress down the oversize
> thrust washers by .001". It will only take a few seconds, as they are very
> soft. ISTR this is even described in the TR2/3 service manual.
>
>
>>I understand that this is a real weakness in the TR4 engines so I
>>want to get it right.
>
>
> It's actually not a weakness in the TR4 engine ... the problem is with the
> TR250-6 engine which has only half as much thrust surface as the TR2-4
> engine. The 6 pot is also known for letting the washers fall out of place
> when they're well worn, but I've never heard of that happening with the
> TRactor motor.
>
> You could probably "get away" with either the .003" or the .008" ... the
> danger with going too tight is that thermal expansion may remove all the
> clearance which would make the bearings overheat and weld, while the larger
> clearance allows the crank to bang into the washers every time you depress
> the clutch, which will shorten their life somewhat. But since it's so easy
> to do right ...
>
> Randall
>
>
Jeff,
What Randall states here is true. I used this method on my 3 engine.
Remember as Randall states, the washers are soft so sand a little, and
measure alot.
Bob Labuz
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