I'm in the process of doing some work on my brother's Overland Model, Union Pacific 5000 class, 4-10-2.

The mechanism runs smoothly....BUT the gearbox is VERY noisy!!

There is too much slop (shouldn't be any) in both the worm shaft bearing-to-gearcase-casting, as well as the gearcase-casting-to-drive-axle. The result is that the gearbox can flex/rock from side to side on the axle and the worm shaft (and bronze bearings) can dance around in the gearcase!!

I'd like to be able to just drop a "good" gearbox over the existing axle cog, but I realise that that simply isn't going to happen. So, I'm going to have to dismantle the main (3rd) axle assembly, press-off the gear and then re-mount a new gear and assemble a new gearbox.

I think a ball-bearing NWSL gearbox (part number 1150-6) is going to be the best option; but I will have to just measure some key dimensions first of all.

My usual "supplier" (ie: ebay), doesn't have this particular gearbox listed (not even on the US ebay site).

Does anybody know of an Australian hobby shop that would be able to supply this gearbox for me?

Any help will be appreciated.

Cheers
Roachie

I'm in the process of doing some work on my brother's Overland Model, Union Pacific 5000 class, 4-10-2.

The mechanism runs smoothly....BUT the gearbox is VERY noisy!!

There is too much slop (shouldn't be any) in both the worm shaft bearing-to-gearcase-casting, as well as the gearcase-casting-to-drive-axle. The result is that the gearbox can flex/rock from side to side on the axle and the worm shaft (and bronze bearings) can dance around in the gearcase!!

I'd like to be able to just drop a "good" gearbox over the existing axle cog, but I realise that that simply isn't going to happen. So, I'm going to have to dismantle the main (3rd) axle assembly, press-off the gear and then re-mount a new gear and assemble a new gearbox.

I think a ball-bearing NWSL gearbox (part number 1150-6) is going to be the best option; but I will have to just measure some key dimensions first of all.

My usual "supplier" (ie: ebay), doesn't have this particular gearbox listed (not even on the US ebay site).

Does anybody know of an Australian hobby shop that would be able to supply this gearbox for me?

Any help will be appreciated.

Cheers
Roachie

Bill, I don't think there is anyone who carries a comprehensive stock of NWSL items in Australia these days, Bergs carry some items, so you might ask them. However dealing with NWSL direct via mail order is dead easy, I buy stuff from them all the time.

.

Branchline in Croydon (Vic) stock NWSL stuff, and will order parts in for you. I've sourced a few replacement gears through them. If you show them the original they will take the time to ensure you get the exact part needed.

It is very hard to find an Aussie hobby shop webpage that actually works , is easy to navigate and shows product listings, this one is pretty good from what I have seen so far

NWSL are great to deal with direct, have you had a look at their catalogue pages yet ?

NWSL are great to deal with direct, have you had a look at their catalogue pages yet ?

Thanks for all the responses....

BladeHunter...yes I have had a look at their catalogue; which is where I deduced that I will probably need the part number 1150-6. I could get away with the non-ball-bearing model of the same dimensions, which is part number 150-6.

Anyway, thanks again....I will send an email off to NWSL direct.

Roachie