Sunday, December 3, 2017

Bachmann HO Scale Climax Disassembly

Suggestions before starting

1. Have the right frame of mind, and be patient, don't rush it.
2. Take plenty of pictures before and during the process.
3. Ideally its very convenient to have a magnetic parts tray 
to hold the dozen Phillips head screws.
4. Be patient, don't rush it especially removing and installing the cylinders. 
5. Good lighting and magnification.

Remove the two screws holding the ash pan, remove the pan to expose the gears.

Gently lift the drive line assembly up out of the gearbox, disconnecting the slip joints.


Drive line assembly.

Remove both trucks (pressure fit) by simply pulling each one up. Next remove the 4 screws shown, 2 are for the cab, the other 2 for a cover plate. 

Remove the 2 boiler screws.

Remove the 4 screws (top of picture) that hold the cylinders, then carefully pull the 2 pipes (up) from  out of the boiler cradle. 

The motor and PCB assembly are remove from the gearbox and placed to the side. The gearbox is in the lower right corner of the picture. (I learned this order of disassembly is easier than what I did when I took these pictures, which explains why the cylinders are already removed)

Remove the cylinders. 

One side of the gearbox assembly, simply remove the 2 screws and the plate to service these gears.

I split the opposite side for access to the split gear and shaft assembly I needed to replace. This caused the engine to the cylinders, but the loco would not move the as the power wasn't being transferred to the trucks.

Pictures showing the motor assembly and PCB.
90% of this job is figuring out how to disassemble this intricate loco. Keep your screws and assemblies together so you know what goes with what. I hope this was of some help to you, as there are many of the dead Climax locos out there that are shelf queens, hopefully this will inspire you to repair it. Parts are available at Bachmann Trains.

The shaft assembly below

I replaced was $11.00


  1. Thanks for the help. Missed one darn screw and couldnt get the gear box out. Now to find a gear.

  2. Sad to say my unit broke down only recently and found out that the same part that you replaced is now out of stock from Bachmann and they don't even know when it will become available. I live here in the Philippines and we don't have hobby shops that sells train and parts so I guess my Climax would be one of the shelf queens. Was hoping that Bachmann Parts would cannibalize one of their defective Climax and get the needed part but they did not even show some desire to help. My trains are all Bachmann. Had I known that this will be their after sales service, I should have bought other brands.

    1. Hopefully Bachmann will have another run of parts come in, usually when they have an issue with gears they re-engineer the gears (takes some time) and make the out of metal (like the HO and On30 Shay) I was looking at a used 3 truck Climax recently at a train show, when the guy put it on the test track, guess what happened? no movement except for the cylinders........

    2. Yeah, the cylinders would work but no movement because the drive gear was broken. Since this was an issue with the Climax to a point that Bachmann was replacing units because of the problem on the gears, I was expecting Bachmann Parts to take some extra efforts to locate a gear even to a point of cannibalizing the parts from other defective unit in their Service Department just to satisfy a customer. Was working in the Service Department of a Japanese company and we usually stock parts for problematic models good for ten years after phase out or stop production. Hope they do some changes because our trains are not the throw away type of toys which we can dispose once it becomes defective.