Engine won't run

Applying power directly to the brushes does not work.  In order for the motor to spin, there must be power to the field coil as well as the brushes.  The normal power flow is power runs from the field coil to brush one, through the commutator, then out the second brush holder, and then to ground.  The E-Unit reverses the power to the brushes by switching which brush gets the power first.

 

First, check the wheels to ensure they turn freely and nothing is binding.  If they are free, my next thought would be the eunit.  I would check the finger contacts to ensure they are making good connection with the drum.  You could try gently pushing on one contact at the time, against the drum to see if the motor starts to spin.

Thanks for your quick response - I'll check it out tomorrow and let you know.

On Monday, December 29, 2014 11:00 PM, O Gauge Railroading On Line Forum <alerts@hoop.la> wrote:


Reply By Joe Fermani: Engine won't run== To reply by email, write above this line. == Hello, bakerout: We're sending you this notification because you are either following the forum, the content, or the author listed below. New Reply To Topic
| Subject: Engine won't run Reply By: Joe Fermani In: Train Forums / Hi-Rail, O27 and Traditional 3-Rail O Gauge | |

Applying power directly to the brushes does not work.  In order for the motor to spin, there must be power to the field coil as well as the brushes.  The normal power flow is power runs from the field coil to brush one, through the commutator, then out the second brush holder, and then to ground.  The E-Unit reverses the power to the brushes by switching which brush gets the power first. First, check the wheels to ensure they turn freely and nothing is binding.  If they are free, my next thought would be the eunit.  I would check the finger contacts to ensure they are making good connection with the drum.  You could try gently pushing on one contact at the time, against the drum to see if the motor starts to spin.   View This Reply
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