How about the original procedure?
Want the coal pile mod and headlight moving procedure, too?
1:20 2-8-0 motor screw adjustment procedure
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Posted by Dave Goodson on January 09, 2002 at 12:15:10:
While doing some conversion work on one of the new Bachmann 1:20 scale 2-8-0’s, I found the motor to be loose on the gearbox.
This is a new design gearbox mount from Bachmann, and bugs may have inadvertently crept in to the assembly process.
The following is the procedure I used to adjust this and subsequent units. First is the boiler removal, which is about the easiest Bachmann Large-Scale to disassemble to date.
- Roll engine over on fireman’s side, locate forward end of reverse
actuating rod under running board where it attaches to the valve gear.
Remove slot-head screw. NOT MAGNETIC! Don’t lose it!
- Roll engine onto its wheels. Remove all 4 screws and both smokebox
supports (if you try to flex them out of the way, it will scratch the
- Roll engine over on it’s back.
- Remove ashpan (4 small screws).
- Remove 4 screws about in the corners of inside of firebox under ashpan.
- Remove one screw between cylinders under front truck.
- Separate boiler from chassis. Pull motor wires down from boiler to reveal
in-line plug. You may unplug for complete separation of boiler from chassis.
Check motor for tightness to gearbox as outlined below:
Pull the lower gear cover, 4 screws, and front support bracket on top of frame to gearbox, 2 screws, lift the motor/gearbox off, removed 4 screws on one side and 2 on the other of the gearbox, separate the gearbox halves. The motor screws are located inside the gearbox. I removed the screws, locktited (222) and lubed before re-assembly.
When re-assembling, make sure the sander pipes from the sandbox on top of boiler fit into holes provided in frame just forward of valve gear support bracket. They may spring backwards and rub on lead driver.