I will hazard a guess here. Perhaps the original
thrust washers were babbited on one side. Babbit metal
is white compared to steel which is more Grey. Babbit
was once used as bearing material in rods (Ford T for
one). Thus the white side against the crank where most
of the wear would take place. For the ones with
bearing bronze rather than babbit, the bronze should
be against the crank. A "modern" version of the
instruction woild be: "Put the bearing surface against
the crank". A true WAG.
John Young
--- Bob Labuz <yellowtr@adelphia.net> wrote:
> On Tuesday 29 January 2008 07:22 am, DLylis@aol.com
> wrote:
> > If I may raise an old subject once again. I just
> want to check with the
> > list.
> > I am helping a friend rebuild his 3A motor and as
> most often happens when
> > three or four guys work together questions come up
> that might not be raised
> > when working alone. This one has to do with thrust
> washers.
> > The factory manual says to put them in with the
> 'white metal side against
> > the crank shaft". The thrust wshers that were
> received from the supplier
> > are steel on one side and brass/bronze (?) on the
> other. The yellow metal
> > side has oil grooves in it. As the TWs were being
> installed with the
> > steel side against the crank (because it is white
> metal) I said NO.
> > First the steel side has slightly raised numbers
> stamped into it, and the
> > yellow metal side has the oil grooves which
> should go against the rotating
> > member. Turn them around. This is the way I have
> installed these things.
> > All agreed that my logic was correct, "but it
> says. . ." I never
> > questioned the yellow metal side with the oil
> grooves against the crank as
> > correct until this.
> > What say others?
> >
> > David Lylis
> > 69 TR6 CC26160L
> > 60 TR3A TS74461LO
> >
> >
> David,
>
> You are correct, the washers are inserted so the
> "groove" sides are against
> the crankshaft.
>
> Bob
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