In The Belly Of The Beast (1)

[Schraddel]

Hello,



this time a Cab Forward from Intermountain was put onto my workbench: https://intermountain-railway.com/ho/html/59002.htm

Damage report: Loco does not move, sound and lights are doing. It seems to be an mechanical problem.

Testing the loco in mute mode: motor is reving but no movements at the wheels. The fault must be anywhere in the drivetrain.








For this i started demounting the loco. After removing some details at the boiler, some screws became visible and this allowed to take off the upper half and the cab.

















But not complete because there were some wire connections. As the SP has a lot of special headlights, it not a good idea to disconnect them. Let's make a workaround.

















At the rear end in the the smokebox this wire wad was visible.


















Front end too.

















After removing some tape more screws became visible and after removing these, the upper half of the ballast weight could be lifted out. This allowed a first glance onto the drive train. And of course of more screws.


Turning the motor gentle at the flywheel, no jamming, no cracks at all and the shaft and the universals were firm. The fault has to be searched further down.

















And here too, after removing motor and shaft, more screws.



















After removing theses screws, the lower half of the weight could be lifted out.


And guess, more screws. Ather removing these ones too, the lower half of the boilder and running boards was revoved.



















But before the articulated joints between the two group of drivers has to be removed; screws



















Now more test could be made.


The axle gear box of the rear group was o.k.


And the one of the front group was also o.k.


The fault must be within the transfer gearbox.

















Next step is to remove the transfer gearbox.



(to be continued)