Deltic destruction

[Spireblade]

I have a Railroad Class 55 which stopped working for no apparent reason. On further investigation I noticed a dreaded track pin jamming the wheels. Once freed, I tried to run it again to no avail. My thoughts were that I had blown the decoder but trying it in another loco it seems fine. I tried the decoder from the other loco in the Deltic.......nothing.

Is it likely I could have killed the motor?

[walkingthedog]

If there is one track pin there might be others inside the loco. Worth a look, or have you done that? 

[Spireblade]

Yes, it all looks clear.

 

I have taken the decoder out and tried it on a DC line.....still dead.

 

[Chrissaf]

I have taken the decoder out and tried it on a DC line.....still dead.

.

Yes but did you replace the decoder with a wired through blanking plug. The motor will be dead on DC without a blanking plug fitted to the now vacant decoder socket. The blanking plug is wired across between the power in and motor out pins to pass power through from the pickups to the motor.

.

EDIT: In response to your later post below. My post edit window still open. The wire near the middle wheel probably goes to a wheel pickup.

[Spireblade]

Aha.....

there is a broken wire that I have no idea where it fits. Somewhere near the middle wheel. Great.

[Spireblade]

I have taken the decoder out and tried it on a DC line.....still dead.

.

Yes but did you replace the decoder with a wired through blanking plug. The motor will be dead on DC without a blanking plug fitted to the now vacant decoder socket. The blanking plug is wired across between the power in and motor out pins to pass power through from the pickups to the motor

[Spireblade]

Yes Chris, did that. It must be the broken wire..  :-(

[Spireblade]

It looks like it should be soldered on to the motor body but I'll take it to be properly done by someone who knows what they are doing!

[96RAF]

Try downloading the service sheet (probably HSS334) and it will give you a good idea where the wiring is attached.

 

Basically there is a wire from the pickups on each side of both bogies leading to two opposing corners of the DCC socket and the other two corners attach to the motor brushes - small metal tags rather than to the motor can. There may be a capacitor that is soldered to the motor across the brushes but it doesnt show very well on the service sheet if there is one.