--- In [email protected], "salinas4446" <donlh...@...> wrote:
It's been a while since I swapped the trucks on my two 4-6-2's. See
embedded comments. Rich G.
> I'm trying to replace the two axle trucks (Andrews) that came
> installed, with the three axle trucks (Commonwealth) that were
packed
> separately. I'd appreciate a response from members who have
completed
> this replacemant.
>
> Question 1: Can I insert an axle from a freight truck as the new
> middle axle?
I've used wheelsets from an AM freight truck here. It may be
necessary to relieve a small bit off the axle ends (I had to...) in
order for the center wheels to roll freely. It's kind of trial and
error. The wheelset may flop around a little, but I've not
experienced any derailments because of it. Also, see response to Q2
below..
>
> Question 2: When I test fitted a freight axle, two molded studs on
> the Commonwealth bolster pressed against the axle and it wouldn't
> rotate. Why are studs that tall?
It seem the intention is to melt the studs down with a soldering iron
once the contacts are installed in order to restrain them when the
wheels are removed from the truck. These studs can be melted or cut
down to clear the axle. This combined with relieving the axle ends
allows the wheeset to roll freely.
> Question 3: The Andrews' brass wire contacts don't fit the axle
> spacing on the Commonwealth. Should I substitute the contacts for
an
> A.M. lightweight car truck? Their spacings are the same.
If the trucks came with the 4-6-2, there should be longer contact
wires in a small package included. If not and the passenger car
contacts fit, there's no reason not to use them.
> NOTE: A.M.'s Commonwealth is shorter than those in published scale
> drawings. Did Commonwealth actually cast them in more than one
length?
Possibly. Couldn't tell you without further research...
> Question 4: Are "molded studs" (see Question 2) the key to
Question 3?
Partially, its what holds the contact wires in position. The coiled
portion of the contact wired goes over these studs. See Q2.
>If so, where do the screws go, in view that those studs are not
> drilled and tapped?
Most likely extras for the Andrews trucks.
>
> Thanks for your assistance, and Happy New Year to all.
>
> Don Hand
> donlh...@...
>
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