Reply to "Great Northern railway"

SP AC-4 assembly (cont).

Tender shorting out:

While testing the engine on the railroad, the engine was hesitating every once in awhile. Key used blackened tender screws and draw bar and pin so I thought, for sure, these were the culprits. After about an hour of 'fixes', I finally turned up the throttle to full and the circuit breaker 'went'. These motors are so efficient that the low voltage/amps don't trip my CB's. Using a voltmeter, I found one brake shoe touching the insulated side wheel on the tender. A jeweler's flat edge screw driver prying it away from the tire fixed it.

12/10/166:59 PM

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