Help on Atlas Oil Pump Accessory

Al

That accessory has a DC motor and is why in it only hums when you put track or transformer power to it but works with the 9v battery. To get it run off you layout power, you'll need to add a rectifier between the power source and motor. I'll let one of the sparky's chime in on what kind of rectifier and where to get one. I had mine made by one of the EE's at my office, so can't tell you what you need exactly.

James

 Thanks for response .Strange as Atlas website says it is 8-20 V AC/DC.Perhaps this is the new models only. I  thought it operated nicely before connected to track power.

I am going to connect to battery for now. May order another new one.

I captured the following from the video you reference and assume your unit is missing the board shown below:

So presumably you are simply connecting your 9V battery directly to the DC motor. 

For less than $3 on eBay, free shipping from Asia, I suggest an AC-to-DC converter module.  This would allow you to operate from train transformer Accessory AC (e.g., 14-16V AC).  Screw-terminals on the AC input and DC output.    Photo was hijacked from another thread and says 12V DC output but use screwdriver to set to whatever voltage has a suitable motor speed.

As Jim1973 suggests, you could also perform the AC to DC conversion with just a 5-cent rectifier albeit without the ability to adjust motor speed.  Just using a rectifier alone might have some motor buzzing though from the video it sounds like a fairly noisy accessory from the gearbox so you might not hear the motor buzzing. 

I actually have an AC to DC conversion board. Thanks for suggesting that. I never thought if that.

Al

Thanks Stan2004,

AC to DC conversion board installed.... works great, this forum is great.