Hi everyone, I have a Lionel heritage norfolk and western 6-28345 sd70ace that stopped smoking blowing out and it just barely creeps out of the top vent, I’m assuming the fan stopped working on it. On Lionel parts website it shows a while smoke unit resistor for $35 do I have to buy the whole thing or is there something else I can do or try?
matt
Replies sorted oldest to newest
Are you getting any blinking lights from the cab???
This locomotive is too old for the self diagnostic. You can get just a motor, unfortunately I am having trouble narrowing down witch one it would be hopefully some one else will pop in with a PN
It should be 6101154130.
Here is a link to the Lionel parts page:
I agree with DAN, probably the motor. Also change the batting and make sure there is enough air going through from the fan.
So took it apart last night cleaned it out, put a drop of oil on the shaft that spins the fan blade, reassembled and it worked great. About half hour later it stopped smoking, took it apart again and it got so hot it melted the funnel and it collapsed and sealed itself shut. Any ideas how it would get so hot it would do that? The coil was in the batting and it had fluid like it was suppose to be nothing out of the ordinary.
matt
The smoke unit has an 8Ω resistor, so the power is regulated. I am not sure if the R4LC is controlling that or not. We need someone else who knows to chime in here. The good news is that most of the melted parts are available.
The heat is enough to melt plastic if no air is blowing. Sounds like your motor or motor connection is suspect. Need to address to prevent distorting the exhaust grill of the shell. Recommend buying new funnel and motor.
@Danr posted:The smoke unit has an 8Ω resistor, so the power is regulated. I am not sure if the R4LC is controlling that or not. We need someone else who knows to chime in here. The good news is that most of the melted parts are available.
This locomotive uses a regulator, and came equipped from the factory with a 6ohm resistor.
These regulators are known to fail and create no smoke, or a whole bunch of smoke as the O.P. has experienced with the melting. Some have mentioned actually seeing the resistor glow.
Coincidentally, regulator failure has been attributed to the 6ohm resistor. It has been suggested that the resistor be changed to an 8ohm in these older smoke units.
Regulator
Heres the OEM smoke unit which is still described as a 6ohm unit. It would be wise to order an 8ohm resistor and change it.
Heres a link to the entire parts page: Lionel 6-28345 Parts
In the meantime Gunrunnerjohn should be along shortly.
Well It’s showing that the 6 ohm resistor is unavailable from them so that’s not a option anyway, I’m assuming 8 ohm is what they use in the newer locomotives and I can get one from one of those?
Suggest ordering/replacing:
New funnel (old one melted)
AC Regulator (something causing excessive voltages to damage)
New smoke unit (addresses potential fan motor issue and your board has been really hot too)
New 8 ohm resistor and swap out in new smoke unit (due to potential contributor to long-term regulator failure).
Most certainly replace the 6 ohm resistor with the 8 ohm, those were very hard on the regulators. FWIW, when the smoke motor stops, I normally don't try to revive them with oil, I just replace them. As stated, if the fan stops running, the smoke unit can indeed get hot enough to melt the funnel, and sometimes even the locomotive shell!
Unless the PCB is seriously cooked, I don't see the need to replace the whole smoke unit.
If the regulator croaks shorted with a 6 ohm resistor in the smoke unit, instead of the 6-7 watts of heat in the smoke unit, you get more like 50 watts of energy dumped into the smoke unit. That will really do a lot of damage quickly in a plastic shell! Even with an 8 ohm resistor, you still get around 40 watts of heat with similar effects.
Access to this requires an OGR Forum Supporting Membership
