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Setup of MTH RailKing Crossing Gates for Operation

Jack has put considerable thought into submitting his question so I am sure you’ll want to help him if you can. Please use the green comments link below Jack’s posting to add your comments and suggestions.

Jack says:

I am sending details of the “O” gauge crossing gates arrangement I have installed which the hope of receiving guidance on modifications required for proper operation. The arrangement uses the RailKing (RK) Crossing Gates in conjunction with a MTH RailTrax I.T.A.D. (ITAD) Control. A wiring diagram and photos describe my installation which does not function and displays the following characteristics:

1. The setup is based on using Auxiliary Power from the 14v DC terminals on the transformer.

2. When the auxiliary power is turned on, the Flashing LED lights start blinking and do not turn off.

3. The gates freeze in the down position as shown on the photo.

4. When the locomotive passes through the crossing, there is no effect on the gates.


The installation was in accordance with my interpretation of the two sets of operating instructions- Gates and ITAD. I had to make some assumptions:

1. The gates and the ITAD required both to be directly powered from the transformer.

2. The input terminals on the ITAD were interchangeable, ie, either could be the positive terminal.

3. As auxiliary power is selected on the ITAD switch, it was of no importance for the ITAD to be on the same side of the track as the Lock-On for track power.

4. There is not direction about the location or orientation of the ITAD, nor any information on considerations for the infrared sensing circuit. I expected to see a red light on the ITAD but see none.

5. That the components are in good working condition.

The Operating Instructions for the Gates and the ITAD are attached.Crossing Gate Wiring Diagram

Crossing Gates Operating Instructions


I.T.A.D. Operating Instructions

I would appreciate any suggestions toward making the gates operational as described in the operating instructions.

Readers can comment below.


4 Responses to Setup of MTH RailKing Crossing Gates for Operation

  • Bryan says:

    Did you ever get an answer on this question?

  • Andy W says:

    Bryan, it doesn’t look like anyone knows the solution to help Jack.

  • Harold says:

    I have the exact same issue. My current thought is the gates I have are defective. I have checked the set up with a friends set of MTH gates and all works well. I am still exploring the cause but at the moment it appears to be a problem with the yellow wire.

  • Buddy says:

    From the picture, it looks as if your rocker switch on the ITAD is set for track power and not AUX. power

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