This shade tree diesel mechanic dropped the trucks and main gearbox last
night. I worked on the trucks first. I installed some phosphor bronze
wipers on one truck and when checking the axle mounted gearboxes found
them working just fine. The other truck already had a stainless steel
looking wheel wiper (factory) installed. This set of axle mounted
gearboxes didn't run as smooth. Some of that might be due to the wider
wiper causing a slight amount of drag. I also went in and reamed the
axle holes a bit. It's improved but still not as good as the other truck.
I twisted the flywheel (custom made by Jack Troxell many years ago) and
found the same hitch as before. This either means the motor or the
transfer gear box is the problem. After dropping the gear box and
cracking it open I see three gears, a small nylon one on top followed by
two larger brass ones. Sure enough the smallish plastic guy is split.
So tonite I'll be searching my reserve stash of parts to see if I have a
replacement. I suppose replacing the whole box with one from NWSL is a
possibility or perhaps they have a replacement gear available. This has
become a pain in the butt, however it can be dealt with!
Bob Werre
BobWphoto.com
On 12/29/10 3:44 PM, Ed wrote:
>
> > I've ordered a set of the former
> > Hobby Town universals should I need
> > them, since the originals have been
> > problematic for a long time.
> > Bob Werre
>
> After contemplating what to do with the cheesy original FA u-joints, I
> ended up going down the Hobbytown path and am very happy with the end
> results. The hard part was tapping some holes for set screws to snug
> up against the flat on the shaft. I drilled out the large hole to fit
> the shaft diameter and then drilled/tapped two holes going sideways so
> that the flat could be held firmly in place. The set screw 180 degrees
> away is to balance the weight of the set screws. Works very well. As
> well as that one custom machined u-joint a friend made that also works
> well, but would cost a lot more. I like the Hobbytown u-joints because
> of the large beefy plastic/nylon cups which are quite strong. No more
> wimpy u-joints on the mighty NYC. Shipped them off to the PRR.
> Ha....!! Ed L.
>
> .
>
>
[Non-text portions of this message have been removed]
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