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Guys and Girls, I just spent 3hrs pulling my Bachmann WD 2-8-0 to bits again this time to fit a Lenz Gold Series decoder. Aww what a nightmare! Whoever designed this model deserves a medal for making something that should have been simple very difficult. First Bachmann, don't just provide an exploded diagram with your models how about some instructions as to what screws to pull out. There are three, one at the drawbar, one at the clyinders and it's the front one and one right in the middle of the chassis. Don't forget to unscrew the eccentrics. A bit of a wiggle and some swearing helps the chassis pops out to reveal ......... no space! Couldn't even get a gold mini in ! Everything is weight on this one. So I decided to fit this one in the tender and even it was difficult to get apart. A few more rude words and the chassis pops out of the tender. I removed the steel weights and replaced that with the equivalent weight in lead, mounted the decoder, drilled two holes in the tender floor to pass the wiring with it's plugs through. Also had to machine a couple of slots on the loco footplate where I passed the wiring through as it was getting crimped between the chassis and the footplate. Just about finished ready to test and one of the original pickup wires snaps off just as I was finishing up. Well it's going to have to wait now as it got moved down the list.

Ozzie 21
 

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>Aww what a nightmare!
At least Bachmann have not listed it as "DCC Ready" in the 2006 catalogue. Still it's an awful shame for such an expensive model. There may have been a lot of them about in the West Riding of Yorkshire but I think they will all have been "recalled for urgent refit" on my layout, as in "no where to be seen".

David
 

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The WD, Collet, N Class all pretty much have the same arrangement.
A tower motor driving the rear axle . I normally mount a TSC M1 or similar sized decoder on top of the motor mounting. Their not normally more than a few minutes work to install once you know the trick.
For this application Digitrax TCS and other wrapped micro decoders are easier to install.
I have nothing against Lenz decoders but they do need to ensure they can't short anything and more importantly need to dissipate heat.
 

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Remove the plastic top plate from the motor then using double sided sticky pads fit decoder to the motor itself.I have done 2 WD's this way.
MickD
 

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I have found a couple of locos where every bit of spare space has lead in it.

I take out the lead and cut off a wedge, allowing the decoder to fit. It's not that much weight lost. Trim the decoder cables to save a bit of space too.
 
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