M.T.H. RailKing RKS SD70ACE Quick start guide

M.T.H. HO
SD70ACe/SD70M-2
Diesel Engine
Congratulations! You've just purchased the most
feature-rich and technically advanced HO diesel
locomotive ever produced! This highly detailed
model includes a broader range of features than
you’ll find on any other HO scale diesel, including
operating flashing ditch lights; smooth
performance from a three-scale-mile-per-hour
crawl to full throttle; “cruise control” for steady
speeds regardless of curves, switches and grades;
built-in decoders for DCC and the M.T.H. Digital
Command System (DCS); and a full range of
sounds recorded from a prototype Union Pacific
SD70ACe. If you’re looking for modern motive
power that’s accurately detailed, smooth running,
and a great deal of fun to operate, it doesn’t get
any better than this.
Freight Yard Sound
PLEASE READ THE MANUAL BEFORE USE AND SAVE
WWW.MTHHOTRAINS.COM
(PS3)
ENGINEER’S GUIDE
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TABLE OF CONTENTS
UNPACKING YOUR ENGINE 4
Removing and Unwrapping Your Engine 4
What Else is in the Box? 4
PRODUCT OVERVIEW 5
Getting to Know Your Engine 5
Engine Diagram 7
SET-UP 8
Coupler Installation 8
Lubrication 9
FEATURES AND OPERATION 10
Analog DC (standard DC power pack) 10
DCC Digital Command Control 14
DCS Digital Command System 20
SPECIFICATIONS 22
CARE AND MAINTENANCE 23
Troubleshooting Guide 23
HOW TO ORDER PARTS 29
SERVICE & WARRANTY INFORMATION 32
Service & Warranty Information 32
Limited One-Year Warranty 32
This product may be protected by one or more of the following patents: 6,019,289;
6,280,278; 6,281,606; 6,291,263; 6,457,681; 6,491,263; 6,604,641; 6,619,594; 6,624,537;
6,655,640.
©2009, M.T.H. Electric Trains®, Columbia, MD 21046
CAUTION: ELECTRICALLY OPERATED PRODUCT:
WARNING:When using electrical products, basic safety precautions should be observed, including the following:
Read this manual thoroughly before using this device.
lM.T.H. recommends that all users and persons supervising use examine the hobby transformer and other electronic equipment
periodically for conditions that may result in the risk of fire, electric shock, or injury to persons, such as damage to the primary cord,
plug blades, housing, output jacks or other parts. In the event such conditions exist, the train set should not be used until properly
repaired.
lDo not operate your layout unattended. Obstructed accessories or stalled trains may overheat, resulting in damage to your layout.
lThis train set is intended for indoor use. Do not use if water is present. Serious injury or fatality may result.
lDo not operate the hobby transformer with damaged cord, plug, switches, buttons or case.
Recommended for Ages 14 and up. Not recommended for children under 14 years of age without adult supervision. As
with all electric products, precautions should be observed during handling and use to prevent electric shock.

M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
3
QUICK START GUIDE
Of course, you should read your manual over before running your
engine. But if you just can’t wait, choose how you want to run below and
enjoy!! Now, after a few minutes, shut her down and read through your
engineer’s guide.
I USE A REGULAR DC SUPPLY…
Step 1: Unpack your Engine. (refer to unpacking instruction on pg 4)…
Step 2: Set the engine on the track …
Step 3: Apply increasing DC voltage until she starts up and pulls out!
I'M A DCC OPERATOR….
Step 1: Unpack your Engine. (refer to unpacking instructions on pg 4)…
Step 2: Set the engine on the track …
Step 3: Power up your DCC system…
Step 4: Select engine address 3 and press “F3” to start her up…
Step 5: Turn the throttle and head on down the pike…
I RUN DCS….
Step 1: Unpack your Engine. (refer to unpacking instructions on pg 4)…
Step 2: Set the engine on the track …
Step 3: Power up your DCS system…
Step 4: Add the engine to your system and start her up…
Step 5: Turn the throttle and move out….
CAUTION: M.T.H. HO engines DO NOT OPERATE ON AC
VOLTAGE. Applying AC power to your locomotive could cause permanent
damage and will void your warranty.
Please note, when making setting changes in DCS or DCC, such as address,
please wait a minimum of 5 Seconds after removing power to insure the settings
are stored in the engines memory. Reapplying power in less than 5 Seconds may
result in losing the setting changes.

UNPACKING YOUR ENGINE
Removing and Unwrapping Your Engine
Carefully remove and unwrap the model on a soft surface. By nature, models
with high levels of detail have some small fragile parts.
Carefully remove any foam packing pieces that may be surrounding the model.
What Else is in the Box?
The following items are packed with your engine.
Engineer's Guide (1)
You probably know that since you're reading it.
Mechanical Kadee-Compatible Couplers (2) with mounting hardware
M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
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PRODUCT OVERVIEW
Getting to Know Your M.T.H. HO Locomotive
Key Features
Your new HO Diesel Engine is equipped with the exclusive M.T.H. Proto-
Sound® 3.0 digital sound and control system. In plain English, this means your
locomotive contains state-of-the-art electronics providing realistic digital sounds,
precisely controlled speed in increments of 1 scale mile per hour, and much,
much, more.
Compatibility
The Proto-Sound 3 system is universally compatible with track power and/or
signal combinations including analog DC (regular DC power pack), DCC
(NMRA Digital Command Control), or DCS (MTH Digital Command System).
Simply set your Engine on the rails, apply any one of these power/signal sources,
and move out! The Proto-Sound 3.0 system automatically senses the track
environment and adapts accordingly. No hidden jumpers, switches, magic wands,
or programming required!!! A vast array of realistic operation is automatic when
the Engine is run on analog DC. You can expand access to features in a DCC
environment. Experience the most your new locomotive has to offer in the
simple to use yet powerful world of DCS. To be clear, DCS is NOT a
proprietary version of DCC, as some other manufacturers offer. DCS is a
comprehensive layout control system designed with one primary goal:
make model trains do amazingly realistic things using a simple and
intuitive controller. We put the complexity on the inside, and the fun in
your hands!
Digital Sound
Your Proto-Sound 3 (PS 3) equipped Engine contains over 100 individual
recordings. These recordings are played back dynamically at appropriate times to
create a symphony of realism for your ears. Hear the diesel roar automatically
intensify or lighten when speeding up or slowing down, listen to the sounds of
brakes squeaking and squealing as you come to a stop, or enjoy the random
conversations of railmen working as your model sits at idle. It's all there and it's
incredible.
Your HO diesel includes built-in realistic horn sound effects, including forward
(two blasts) and reverse (three blasts) signalling and crossing signal sounds, all
available with one-touch control from a DCS controller or through any DCC
controller capable of accessing up to F28.
M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
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Digital Control
In standard analog DC mode, your model still operates under digital control. The
PS 3 advance speed control system converts track voltage into digital speed
commands. Your model will run smoothly and consistently at any speed
regardless of load, hills, or curves. If you are a DCC user, you'll quickly learn to
appreciate the precision of our speed control and linear speed curve. DCS users
will enjoy the added benefits of controlling speeds in increments of 1 scale mile
per hour displayed on DCS controllers or easily changing acceleration and
deceleration rates independently without any discussion of bits or bytes. To be
clear, DCS is NOT DCC.
Lights
As you read on, you'll notice there are no instructions for replacing light bulbs in
your diesel. That's because there aren't any. We use specially designed and
controlled LEDs to create realistic lighting effects that occur automatically.
Again, NO PROGRAMMING!! Just come to a stop and watch as the headlight
dims automatically in accordance with rule 17. Of course, as you pull away, the
headlight returns to it's fully bright, yet warm, glow. We even included a light in
the cab so the engineers can see to do their jobs!
More…
In analog DC operation, just flip the track polarity or direction switch at any
speed and watch your Engine gradually come to stop, turn on the appropriate
directional lighting, and smoothly accelerate back up to speed. No other HO
locomotive has features like these. There are so many more things to learn and
enjoy about M.T.H. HO Engines, we could write a book. But, that's no fun. So,
if you haven't already done so, flip to the Quick Start Guide and let's run your
new engine!!
M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
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ENGINE DIAGRAM
Locomotive
M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
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GPS Receiver
Metal See-Through Fan Vents
Detailed Horn
Includes Remotely Activated
Proto-Coupler™ and
interchangeable magnetic
coupler, both Kadee®
Detachable Snow Plow
Crew Figures
Die-Cast Air Tanks and
Fuel Tank
Warning Placards
Safety Tread on End Steps
All wheels Powered
Gently Pull Up and Lift
Roof Hatch OFF To Reveal
Volume Control
Volume Pot Location

Installing Couplers
Your locomotive comes equipped with remotely controllable scale proportioned
operating Proto-Couplers that can be triggered from any DCC controller or the
M.T.H. DCS Digital Command System. Both the front and rear couplers can be
individually triggered. These couplers will not work in conventional operation
with magnetic arms. We have included a set of magnetic arms that can be
installed into the coupler head if desired for aesthetic purposes.
For those who prefer standard mechanical couplers, we've also included a pair
inside your locomotive's box. Follow the steps below to remove the remote
control couplers and install the mechanical couplers in their place.
Removing The Remote Control Proto-Coupler From The Chassis
SET-UP
M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
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Identify & Remove Mounting Screws
Lift Out Cover Plate & Pull Coupler Mechanism Out Through Pilot Hole
Installing The Mechanical Couplers
If you prefer the mechanical couplers over the remote control Proto-Coupler,
remove the Proto-Couplers by following the steps detailed above and then install
the included mechanical couplers or any other Kadee-compatible couplers by
following the steps below.

Lubrication
Using light machine or household oil, apply a very small amount to all axles
points as shown.
Your gearbox is properly greased at the factory and probably never needs service
however, if you run excessive hours pulling heavy loads, it's a good idea to
remove the 2 screws from the gearbox cover and re-grease using M.T.H. gear
grease or equivalent.
M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
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Lubricate Axles (L)
SET-UP
Lubricate Axles (L)
Assembled Coupler
(Shown Right Side UP)
Insert Coupler Into Pilot
(Shown Upside DOWN)
Line Up CENTER Mounting
Hole In Coupler Pocket With
Mounting Hole On Chassis
Tighten In Place Using
Large Screw In Mechanical
Coupler Part Bag

FEATURES AND OPERATION
Now, for the fun stuff! Your new M.T.H. HO Diesel Engine has more features
and operating capabilities than any HO engine ever built by any manufacturer.
We're going to walk you through everything she does in general but, you'll
probably find a few we forgot to mention on your own.
Modes of Operation
There are 3 modes of operation with different levels of features accessible in
each. We refer to them as analog DC, DCC, and DCS. Here's a little more
explanation before we get into the features of each mode.
Analog DC
This is when there is nothing connected to the rails except a conventional DC
power pack. These power packs generally have at least one variable output
controlled by a throttle of some sort and a means of reversing DC polarity on
the track to change the direction of your engine.
DCC or Digital Command Control
DCC is a popular digital command control scheme wherein the track power is
also a digital control signal. That is, using a DCC controller, you can
communicate with multiple engines and have them all moving at different speeds
or moving in opposite directions on the same track at the same time. The
power/command signal remains constant and engines are “commanded” to
perform as desired. M.T.H. is new to DCC but, we recognize it's importance to
many HO operators. So, we loaded our engine with more DCC features easily
accessible to the operator than any HO engine ever built previously. You DCC
guys are in for a real treat!
Please note, when making setting changes in DCS or DCC, such as address,
please wait a minimum of 5 Seconds after removing power to insure the settings
are stored in the engines memory. Reapplying power in less than 5 Seconds may
result in losing the setting changes.
M.T.H. HO SD70ACe & SD70M-2 Diesel Engine
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