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HO Prime Movers by Rapido Dash 8-40CM Support


Rear Headlight

Before calling Rapido for support with your rear headlight, please read the following information: Your locomotive is equipped with "Switching Mode", which is a prototypical way to operate the rear headlight. Pressing F12 will turn on switching mode, which turns the front and rear headlights on, with dimmer. If you would like to have the light come on when you reverse the locomotive, you can press F13 which enables "DC lighting mode"

Important DC Advisory

Do NOT use MRC 1300-series DC controllers with any of Rapido's locomotives. The RailPower 1300 is notorious for voltage spikes and it WILL destroy your locomotive. There is no “if” about it. We will try to help you if we have the parts, but we are not responsible for locomotive damage due to voltage spikes in your power supply. As well, we will not repair any locomotive damaged by an MRC 1300-series controller (or any other "train set" DC controller) unless you have retired the controller. Otherwise the damage will soon reoccur. “Train set” DC controllers should not be used with any modern model locomotives.

General Problems and Inquiries

If your model arrives with damage or there is any other issue, the best thing to do is to call our support team. They take care of all of our warranty repairs and they are all swell guys. The toll-free number is 1-855-LRC-6917 (1-855-572-6917) (outside North America, +1 905-474-3314 or 905-474-3324).

DCC Decoder Installation

Our DC Dash 8-40CM locomotives are DCC-ready and come equipped with a 21-MTC plug for easy DCC decoder installation. The plug is accessible by turning the locomotive upside down and opening the hatch on the base of the fuel tank.

Function Issues on Digitrax Systems

If you operate with a Digitrax DCC system and your DCC loco does not seem to be responding  as it should, please try the fix described below before contacting us. It may save you some time and aggravation!

Apparently, some Digitrax systems store the address of every single loco that they've ever used on them, and regardless of whether the loco was dispatched or not. Once this memory fills up, any new locos that attempt to be used by that system exhibit very unusual behavior including non-working functions and odd responses.

The solution to this is easy. All you need to do is clear the memory in your system. This is done by clearing slot #36, see the instructions below. Once you've done this, you'll likely find that your loco operates exactly as you expected it should.

General Instructions for Closing Command Station Option Switches (for specific instructions for your command station and throttle, see the instruction manual for your equipment):

    1. On the command station, set the MODE toggle switch to the OP (center) position.
    2. Using your throttle go into Switch Mode
    3. Enter the Option Switch number you wish to change ( in this case 36)
    4. Press the "c" key on the throttle.
    5. You will hear a beep.
    6. On the command station move the MODE toggle down to SLEEP then back up to RUN. 
    7. Using your throttle, turn Track Status back on.

For more information, see this page from Didigtrax's web site.

Dash 8-40CM Exploded Parts Diagrams

Dash 8-40CM Exploded parts diagram

Dash 8-40CM Manuals

Instructions (English)

Instructions (Français)

ESU LokSound Decoder Manual  

ESU LokSound Bulletin

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Rapido Trains Inc. is a high-end manufacturer of model trains and accessories in HO, OO and N (North American 1:160 and British 1:148) scales. Our aim is to recreate the entire rail travel experience, from fully-detailed interiors and underframe equipment on our trains to fully-wired telephone poles for your model railroad.