Well folks, into the vat again. The front stack on the BB stopped smoking with no fan air and no heat and I got the 4 blink sequence in the cab light. Up to that time, both stacks were smoking bellows along with the whistle after Mike's overhaul. Got about 20 minutes of run time.
So, I bit the bullet and took the boiler off and snapped the following pics. I disassembled the dual smoke unit and you can see the innards.
Learned the following: The left side of the board and left fan and left heating element is designated smoke 1 on the board and is for the rear stack. The right side of the board and right fan and right heating element is designated smoke 2 on the board and is for the front stack.
Noticed the following:
Both funnels feeding the heating elements were charred a bunch.
The heating element for the front stack was more black than the one for the rear stack.
The thyristor for the heating element for the front stack was 1/4 inch from its heating element.
The thyristor for the heating element for the rear stack was 1/8 inch from its heating element.
The wick for the left side for the rear stack looked burnt - don't know if that is normal.
The wick for the right side for the front stack looked more burnt.
The black reservoir containing the wick was bubbled out on both sides due to over heating.
So, now for questions:
What component failed - fans, heating elements, thyristors, entire board. How does one check each component? Any help would be appreciated.
