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 Posted - February 20 2007 : 6:34:22 PM
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Here is a rebuild you can do if you want a bit of a challenge! I had the Cox GP9m with a blown motor. The loco was a gift from a friend many years ago. Not wanting to throw the loco away, I decided on a rebuild.
First was to strip the thick Chessie paint. Then I replaced the molded on grabs with bent brass wire. The original handrails are sheetmetal and were not replaced. The shell was then painted. That was the easy part!
The hard part is the chassie, or lack of one. The Cox loco does not have a chassie to work with! So I cut down an AHM GP18 chassie to fit. Plan on lots of cutting, sanding and test fitting. Once the chassie was done, I added a can motor and single flywheel.
The light is slipped into a piece of brass tube glued to the cab roof.
So what do you think? It was a lot of work just for me to keep a cheap loco in use. But it was fun and worthwhile to do.
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Posted - February 20 2007 : 7:38:36 PM
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Great model, subtle weathering, More more. [:D]
Bob
Alco Fan
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Posted - February 21 2007 : 07:08:53 AM
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Great Work...the motor switch to the AHM GP18 chassis was a great idea. Looks Great.
Tony Cook
HO-Scale Trains Resource
http://ho-scaletrains.net
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 Posted - February 21 2007 : 12:53:40 PM
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More great stuff! I like the converted drive & chassis. Isn't the Cox GP9m the same as the Walthers Trainline? For future reference, maybe you could use that chassis.
Good stuff though. It's fun to Frankenstein engines.
Although if you come across another Chessie GP9 like that, I'd be interested in it. I want to do one of their ex-WM units - the Western Maryland chopped quite a few of their GP9s.
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Posted - February 21 2007 : 1:23:51 PM
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Yes, the Walthers shell is an upgraded Cox shell. I believe the Model Power GP9m shares the same shell as well. I could have used the Walthers chassie, but then I would have an extra Walthers shell left over. By building the chassie, I not only had the fun of the build, but also had no wasted parts left over.
Mike
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Posted - February 21 2007 : 3:23:39 PM
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GIC,
I did find another Cox Chessie GP9m on ebay.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=160088010674&ssPageName=STRK:MEWA:IT&ih=006
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Posted - February 25 2007 : 01:25:38 AM
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Any of youse know how well these locos run with the stock drive?
Carl T.
President of the Cape James Terminal RR.
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Posted - February 25 2007 : 02:54:40 AM
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I have a Cox F3. I'm pretty sure it is the same drive.
They only had 4 wheel electrical pickup and 2 traction tires.
It runs as well as the Tyco MU-2 drives, if not a little better.
Ray
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Posted - February 26 2007 : 12:02:07 AM
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My GP9s original mechanism ran well at high speeds. It had a bind I couldn't find that made it jerky at very low speeds. Mine had 4 wheel drive but no traction tires. It did have 4 wheel electric pickup.
The power truck is very similar to a Tyco MU-2. It had a 5 pole motor.
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