Precision Scale Heisler #2

Adding to my collection of HOn3 models I purchased an engine that needed some work to rebuild the drive train. Wanting to add to my collection of HOn3 engines I purchased this engine
from a fellow modeler who was looking to move to On3. He mentioned that it had a drive train problem so I knew what I was getting right from the start. The plastic drive couplings had
cracked and the engine would not move. I figure this would be a good opportunity to get a Heisler and see if I could repair the engine. This will be a step by step process to see if I can
do the work to fix this beautiful piece of brass.

construction sign

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This is the picture the seller sent me. This is rather interesting as there has been
quite a bit of talk on the MRH forum about cracked gears on manufacturers
engines. I was looking at fixing this with new brass couplings until I realized
there would be a short due to the electrical pick up on the trucks. I'll explain
as I proceed with the project.


A view of the bottom side shows the screws that will need to be remove to get at
the drive line. There are a total of eight screws counting the two screws that hold the trucks on. One screw is hidden under the one rear wheel and two are hidden under the front wheels.


Location of the six screws that release the shell from the frame.


First to be removed are the keepers that hold
the wheels and axles in the truck frame.


Next pull the keeper off.


Gently pull the wheel sets out being careful
that they don't get caught on the brake shoes.


The ruler will give you a good idea of how small the parts are.
The crank shaft is approximately .600" long.


Not much room for fingers.


Now with the shell removed it exposes the screws that hold the trucks on.