312 SIT Problem

railroad manOGR Forum Member

I recently purchased a 312 with SIT. When it arrived, I put it on the track, no movement. Took off the tender housing and again put it on the track. The SIT moved for about 2 seconds and then nothing. Took engine apart, lubed & oiled and sprayed contact cleaner on both engine motor and tender SIT motor. Reassembled and put back on track, engine runs fine and E unit works but the tender motor for the smoke will not work. Does anyone have suggestions what could be wrong. ps: the bellow looks good with no damage.

7/10/1312:10 PM

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J DaddyOGR Forum Member

With the shell off and using some jumper alligator clips check the motor for a good electrical connection. Will it come on?

7/10/131:22 PM

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MajorOGR Forum Member

Also check to make sure that the brush springs on the tender motor are making contact with the brushes. I have four smoke in tender engines and you have to check and clean every contact point to ensure reliable operation. Do not assume that the switch lever is making contact. I had one make contact but due to gunk no electricity made it through. All contacts must be spotless.

7/10/136:49 PM

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