MTHTrains Rail King RKS SD70ACE Diesel Engine User manual

RKS SD70ACE Diesel Engine
OPERATOR’S MANUAL
(3V PS-2)
Compatibility
This engine will operate on any
traditional O-31 Gauge track system,
including M.T.H.’s RealTrax® or
ScaleTrax™ or traditional tubular
track. It is also compatible with most
standard AC transformers. (See page
22 for a complete list of compatible
transformers and wiring instructions.)
Freight Yard Sound
PLEASE READ BEFORE USE AND SAVE
www.mthtrains.com
Passenger Station Announcement

Table of Contents
Set Up Checklist...........................................................................................................
Lubrication.......................................................................................................
Checking the Battery.......................................................................................
Priming the Smoke Unit.................................................................................
Basic Operation.............................................................................................................
Activating Features...........................................................................................
Manual Volume Control..................................................................................
®
Proto-Sound 2.0 Operating Instructions................................................................
Activating Proto-Sound 2.0 Conventional Mode Features........................
Freight Yard Sounds (FYS)/Passenger Station Announcements (PSA)..
™
Proto-Coupler Operation...............................................................................
Speed Control...................................................................................................
Locking Locomotive Into A Direction.........................................................
Reset To Factory Default.................................................................................
Automatic Sound Effects.................................................................................
Maintenance....................................................................................................................
Lubricating and Greasing Instructions.........................................................
Cleaning The Wheels, Tires and Track.........................................................
Traction Tire Replacement Instructions.......................................................
Locomotive Light Bulb Replacement............................................................
Self Charging Battery Back-Up......................................................................
™
ProtoSmoke Unit Operation......................................................................
®
Troubleshooting Proto-Sound 2.0 Problems............................................
Additional Features Accessible with the DCS Remote Control System..
Transformer Compatibility and Wiring Chart............................................
Service & Warranty Information...................................................................
Limited One-Year Warranty............................................................................
3
3
3
4
5
5
6
7
7
7
8
9
9
10
10
11
11
12
13
14
15
16
18
21
22
23
23
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.

Set Up Checklist
- Lubricate the locomotive
- Check to see whether the battery needs to be charged for full sound effects
- Prime the smoke unit
- Apply power to run as described in the Basic Operating Section of this manual
Lubrication
You should lubricate the engine to prevent it from squeaking. Use
light household oil and follow the lubrication points marked “L” in
Fig. 1. Do not over-oil. Use only a drop or two on each pivot point.
Checking the Battery
You may find, if your locomotive was built several months before you set it up,
that the rechargeable battery has run down and needs to be charged before
operating. If you notice that the sounds are garbled, test and charge the engine as
described in the "Self-Charging Battery Back-Up" on page 15.
RKS SD70ACE Diesel Engine with PS-2
3
DO NOT
OVER OIL
DO NOT
OVER OIL
DO NOT
OVER OIL
Figure 1. Lubrication Points on the Locomotive
Lubricate Pick Up Roller Axles (L)
Lubricate All Wheel Axles (L)
Grease Idler Gears (G)

Priming the Smoke Unit
When preparing to run this engine, add 15-20 drops of smoke fluid through the
smokestack (see Figure 2). We recommend M.T.H. ProtoSmoke, Seuthe, LGB, or
LVTS fluids. Do not overfill the unit or the fluid may leak out and coat the interior
engine components.
If you choose not to add smoke fluid (or have already added fluid but choose to
run smoke-free), turn off the smoke unit by turning the smoke unit control to the
“OFF” position, fully counter clockwise position. Failure either to add fluid to
the smoke unit or to turn it off may damage the smoke unit heating element
and/or wicking material.
RKS SD70ACE Diesel Engine with PS-2
4
Running the engine without a primed
smoke unit may cause damage
Figure 2. Adding Smoke Fluid
Add Smoke Fluid
Figure 3c. Smoke Unit Control
Smoke Unit Control
Figure 3a. Remove Fan Cover to Access
Smoke Unit and Volume Controls
Figure 3b. Fan Cover Removed

Basic Operation
The Throttle knob controls how fast your train will travel. Turn the throttle knob
up ½-way, until the engine and caboose lights shine bright. Put the engine into
motion by pressing the Direction button on your transformer once. (hold it for
approximately 1 second)
If the engine does not begin to move as soon as you firmly press the Direction
button, you may not have sent enough voltage to the track to make the train move.
Turn the throttle up a bit higher until the train begins to move.
Activating Features
Throttle - To increase or decrease track voltage, and therefore train speed, turn the
throttle control knob. Turning clockwise will increase voltage and speed, while
turning counterclockwise will decrease voltage and speed. The engine will maintain
the speed you set after you release the throttle until you turn it again to change the
voltage and speed.
Bell - To sound the bell, in an engine equipped with a bell firmly press and release
the Bell button. To turn the bell off, press and release the Bell button again. The
bell will continue to ring from the time you turn it on until you press and release
the button again to turn it off.
Horn/Whistle - To sound the whistle, firmly press the Horn/Whistle button. The
whistle will sound for as long as you continue to depress the button. It will stop
when you release the button.
Direction - Your train is programmed to start in neutral. The train will always
cycle neutral-forward-neutral-reverse with each press and release of the direction
button. The engine is programmed to restart in neutral each time the track voltage
is turned off for 25 seconds or more.
RKS SD70ACE Diesel Engine with PS-2
5
Cycle Phases
Neutral
Neutral
ForwardReverse

Manual Volume Control
To adjust the volume of all sounds made by this engine, turn the manual volume
control (shown below) clockwise to increase the volume and counter-clockwise to
decrease the volume.
RKS SD70ACE Diesel Engine with PS-2
6
Figure 4. Manual Volume Control
Manual Volume Control

RKS SD70ACE Diesel Engine with PS-2
7
®
Proto-Sound 2.0 Operating Instructions
This manual contains the operating instructions for Proto-Sound 2.0 in conventional
mode only. Instructions for accessing DCS command mode features accompany the
DCS Remote Control System equipment.
Activating Proto-Sound 2.0 Conventional Mode Features:
Proto-Sound 2.0 features are activated by sequences of Bell and Horn/Whistle button
pushes described below. Please read the full descriptions of each feature before using it. To
use these buttons to activate features rather than to blow the horn/ whistle or ring the bell,
you should tap the buttons very quickly with a ½-second pause between button presses.
You may need to practice your timing to make this work smoothly.
Freight Yard Sounds (FYS) or
Passenger Station Announcements (PSA):
Your engine is equipped with a sound package of either freight yard or passenger station
sounds that you can play. Each sequence described below will play as long as it is left
on, randomly generating sounds, but be sure to allow approximately 30 seconds
between the button pushes described below to allow the FYS/PSA sufficient time to
run through each sequence.
!To cue the sound system to play the FYS/PSA, quickly but firmly tap the Bell button
once followed by 2 quick taps of the Horn/Whistle button while the engine is moving.
Tap the buttons quickly but allow approximately ½ second between each press.
!Press the Direction button once to stop the engine. This will trigger the first sequence
of FYS/PSA. The reverse unit is temporarily disabled so that the train will not move as
you use the Direction button to trigger the sounds, and Proto-Sound 2.0 has disabled
operator control over the Horn/Whistle and Bell buttons until the full FYS/PSA
sequence is complete.
!After waiting about 30 seconds for that sequence to run, press the Direction button
again to trigger the second sequence of FYS/PSA.
!After about 30 seconds, press the Direction button again to trigger the third FYS/PSA
sequence.
!Again, after allowing about 30 seconds for that sequence to run, press the Direction
button one more time to trigger the fourth and final FYS/PSA sequence.
Timing Chart
Total Time Lapse: 1 Seconds½
Press
Horn
Short &
Firm
½ Sec.
Pause
½ Sec.
Pause
Press
Bell
Short &
Firm
Press
Bell
Short &
Firm
Feature to Be Activated:
Freight Yard Sounds
Fire the Rear Coupler
Fire the Front Coupler
Speed Control On/Off
Lock into a Direction/Unlock
Reset to Factory Defaults
Button Code:
1 Bell, 2 Whistle/Horn
1 Bell, 3 Whistle/Horn
1 Bell, 4 Whistle/Horn
1 Whistle/Horn, 2 Bells (From Neutral Only)
1 Whistle/Horn, 3 Bells
1 Whistle/Horn, 5 Bells (From Neutral Only)

RKS SD70ACE Diesel Engine with PS-2
8
Fire
Rear
Coupler
=
Bell
+
Sound System Cued to Play
Freight Yard or Passenger
Station Sounds (FYS)/(PSA)
Bell
1st
Sequence
FYS/PSA
+
2nd
Sequence
FYS/PSA
+
3rd
Sequence
FYS/PSA
+
4th
Sequence
FYS/PSA
=Operator
Controls
When Bell
Turns Off
Horn/
Whistle
Horn/
Whistle
Horn/
Whistle
Horn/
Whistle
Horn/
Whistle
!The FYS/PSA will continue, and within a few seconds, the engine will start and move
out on its own at the current throttle setting, in the same direction it was traveling when
you began the sequence. Once the bell turns off, the operator regains control of the
transformer's Bell and Horn/Whistle buttons and can ring the bell or blow the
horn/whistle as usual.
Tips on Using FYS/PSA
!You can terminate FYS/PSA at any time by turning off power to the track for 15
seconds.
!You do not have to be in Forward to use FYS/PSA. At the conclusion of the full
sequence, the train will pull away from the station in whatever direction you were
going when you activated the feature.
!You can use FYS/PSA even if you are double-heading with another engine. If the
second engine is not equipped with Proto-Sound 2.0, you must remember not to
leave the throttle at a high voltage level once you have stopped the engine to run
the FYS/PSA. Otherwise, the engine without FYS/PSA will begin vibrating on
the track as its motors strain to move the train, since they cannot be automatically
disabled during the FYS/PSA cycle (or if an original Proto-Sound engine,
FYS/PSA are triggered differently and that engine's motor-disable feature will not
be active when you run FYS/PSA in Proto-Sound 2.0).
!FYS/PSA can be triggered from Neutral. It will operate the same as if triggered
while in motion except that, at the conclusion of the FYS/PSA, the engine will
depart in the next direction of travel, as opposed to the direction it was traveling
before entering Neutral.
™
Proto-Coupler Operation
This locomotive is equipped with one or more coil-wound Proto-Couplers for remote
uncoupling action. Because Proto-Couplers are controlled through the Proto-Sound 2.0
microprocessor, they do not require an uncoupling track section or modification to your
layout to function. You can fire a coupler from neutral or while in motion. Use the code
shown below (and in the chart on page 7) to fire the coupler(s).
Rear Coupler:
To fire the rear coupler, quickly tap the Bell button once followed by three quick taps of the
Horn/Whistle button, allowing approximately ½ second to lapse between each quick button
press. The sound of the liftbar and air line de pletion will play, and the knuckle will be
released.

RKS SD70ACE Diesel Engine with PS-2
9
Front Coupler:
To fire the front coupler (if your engine has one), quickly tap the Bell button once followed
by four quick taps of the Hor n/Whistle button, allowing approximately ½ second to lapse
between each quick button press. The sound of the liftbar and air line depletion will play,
and the knuckle will be released.
Speed Control:
M.T.H. engines equipped with Proto-Sound 2.0 have speed control capabilities that allow the
engine to maintain a constant speed up and down grades and around curves, much like an
automobile cruise control. You can add or drop cars on the run, and the engine will
maintain the speed you set.
While the engine is programmed to start with the speed control feature activated, you can
opt to turn it off. This means the engine's speed will fall as it labors up a hill and increase as
it travels downward. It is also affected by the addition or releasing of cars while on the run.
Because the engine will run more slowly at a given throttle voltage when speed control is on
than when it is off, you should adjust the throttle to a lower power level for operation with
speed control off to avoid high-speed derailments. When speed control is off, the volume
will drop to allow for better low voltage operation.
To turn speed control on and off, put the engine in neutral, then quickly tap the
transformer's horn/whistle button one time then quickly tap the Bell button two times,
allowing approximately ½ second to lapse between each quick button press. Repeat the 1
horn/whistle, 2 bells code to return it to the other condition. You will want to do this
during the initial neutral upon start-up if you ever couple this engine to another engine that
is not equipped with speed control to avoid damaging the motors in either engine. Each
time you shut down the engine completely, it will automatically turn speed control on.
Lock into a Direction:
You can lock your engine into a direction (forward, neutral, or reverse) so that it will not
change directions. To do this, put the engine into the direction you want (or into neutral to
lock it into neutral), run it at a very slow crawl (as slowly as it will move without halting), and
quickly but firmly tap the Horn/Whistle button once followed by three quick taps of the
Bell button, allowing approximately ½ second to lapse between each quick button press.
Two horn/whistle blasts will indicate that the engine has made the change. The engine will
not change direction (including going into neutral) until you repeat the 1 horn/whistle, 3
bells code to return the engine to its normal condition, even if the engine is kept without
power for extended periods of time.
=
=
whistle
=
Speed Control
Two Whistle Blasts
(indicates change is made)
Repeat to Return
to Normal Condition
Direction Lock
Two Whistle Blasts
(indicates change is made)
Repeat to Return
to Normal Condition

RKS SD70ACE Diesel Engine with PS-2
10
Reset to Factory Defaults:
To override the settings you currently have assigned to the engine and reset it to its factory
defaults, while in Neutral tap the Horn/Whistle button quickly once, followed by five quick
taps of the Bell button, allowing approximately ½ second to lapse between each quick
button press. Two horn/whistle blasts will indicate that the engine has made the change.
Automatic Sounds:
Certain Proto-Sound 2.0 sound effects automatically play in programmed conventional
mode conditions:
!Squealing Brakes play any time the engine's speed decreases rapidly.
!Cab Chatter plays at random intervals when the engine idles in neutral.
!Engine Start-up and Shut-down sounds play when the engine is initially powered on
or is powered off for five seconds or more.
Reset
Two Whistle Blasts
(indicates change is made)
Repeat to Return
to Normal Condition
Place
Engine in
Neutral =
Horn/
Whistle

Maintenance
Lubricating and Greasing Instructions
The engine should be well oiled and greased in order to run properly.
Regularly lubricate all axles and pickup rollers to prevent squeaking.
Use light household oil, such as that found in M.T.H.'s maintenance
kit. Do not over oil. Use only a drop or two on each pivot point.
The locomotive’s internal gearing was greased at the factory and should not need
additional grease until after 50 hours of operation or one year, whichever comes
first. Follow the greasing instructions below. Note that in some tightly packed
engines you may need to move internal components temporarily in order to access
the gears.
1. To access the gear box, remove the cab from the chassis by unscrewing the body
mount screws as seen in Figure 5 and lifting the cab from the chassis.
2. Once the cab is removed, remove the trucks by unscrewing the black Phillips
motor mount screw located on the underside of the drive trucks (see Figure 5).
3. Once the motor mount screw has been removed, pull the motor away from the
truck block and lightly coat the motor worm gear and bronze drive gear (in the
truck block) with grease.
4. Reassemble the truck and motor, being careful not to pinch any wires between
the truck block and motor mount.
5. After repeating the procedure for the other motor, reassemble the chassis and
body, being careful that the wire harnesses are not caught between the chassis and
body, and reinstall the body mount screws.
RKS SD70ACE Diesel Engine with PS-2
11
DO NOT
OVER OIL
DO NOT
OVER OIL
DO NOT
OVER OIL
Figure 5. Body Removal Screw Locations
Body Mount Screw Body Mount Screws
Lubricate All Wheel Axles (L)
Lubricate Pick Up Roller Axles (L)

Lubricate the outside truck block idler and drive gears with grease. Use the
diagram shown in Figure 6 below as a guide and add grease to the points marked.
Cleaning The Wheels, Tires, and Track
Periodically check the locomotive wheels and pickups
for dirt and buildup, which can cause poor electrical
contact and traction and prematurely wear out the
neoprene traction tires. Wheels and tires can be
cleaned using denatured (not rubbing) alcohol applied
with a cotton swab.
To clean the track, use RailKing Track Cleaning Fluid
found in Maintenance Kit (30-50010) or denatured
(not rubbing) alcohol and a clean rag. Unplug the transformer and wipe the rails of the
track, turning the rag frequently to ensure that you are using clean cloth on the rails.
Thereafter, keep an eye on the track and clean it when it gets dirty to ensure good
electrical contact and to lengthen the life of the tires.
Clean any type of track with this heavy-duty track cleaning block ( . Durably
constructed from ABS plastic, the block includes a built-in cleaning pad. For really
stuborn track, you can insert sandpaper into the block in just a few quick steps.
40-1099)
RKS SD70ACE Diesel Engine with PS-2
12
Figure 6. Greasing The Idler Gears
Track Cleaning Block (40-1099) Maintenance Kit (30-50010)
Grease Idler Gears (G)

RKS SD70ACE Diesel Engine with PS-2
13
Traction Tire Replacement Instructions
Your locomotive is equipped with two neoprene rubber traction tires on each
powered truck block. While these tires are extremely durable, you may need to
replace them at some point.
First, remove the truck sides from the truck block. To do this, turn your engine
upside down. If there are visible Phillips screw heads between the truck frame and
truck block (see Fig. 7), go to step A. If not, go to step B.
A. Remove the two Phillips screws that attach each truck side to the truck block.
B. Remove the trucks (see page 11) from the chassis and the truck sides from the
trucks in order to slip the new tire over the grooved drive wheel. Once the truck
sides have been removed:
1. Make sure the old tire has been completely removed from the groove in the drive
wheel, using a razor blade or small flathead screwdriver to pry away any remains.
2. Slip the new tire onto the
wheel. You may find it useful to
use two small flathead
screwdrivers to stretch the tire
over the wheel.
3. If you twist the tire while
stretching it over the wheel, you
will need to remove and reinstall
the tire. Otherwise your engine
will wobble while operating.
4. Make sure the tire is fully
seated inside the groove. Use a razor
blade to trim away any excess tire that
doesn’t seat itself inside the groove
properly.
5. Reassemble in reverse order.
One set of replacement tires is packaged with the model. Additional tires are
available directly from the M.T.H. Parts Department (Order online: www.mth-
railking.com, e-mail: [email protected],Fax: [phone], Phone: 410-381-
2500, Mail: 7020 Columbia Gateway Drive, Columbia MD 21046-1532, ).
Truckside Screws
Figure 7. Truckside Screws
(Reference Picture Only-
Actual Model May Look Different)

Locomotive Light Bulb Replacement
To replace the burned out light bulbs on this locomotive, follow these instructions.
Follow the cab removal instructions in the “Lubrication and Greasing
Instructions” section on pg.11 of this manual.
Once the body has been removed, locate burned out light bulb(s).
Carefully remove bulb(s) from mounting. Disconnect light bulb harness from main
harness wire.
Replacement bulb harnesses are available directly from the M.T.H. Parts
department. (Order online: www.mth-railking.com, e-mail: parts@mth-
railking.com,Fax: [phone], Phone: [phone], Mail: 7020 Columbia
Gateway Drive, Columbia MD 21046-1532, ).
Connect replacement bulb harness and reassemble in reverse.
RKS SD70ACE Diesel Engine with PS-2
14

Self Charging Battery Back-up
The special NiCad 2.4v self-charging battery recharges continuously during train
operation and should last for up to five years. The battery is a dry battery that
should not leak or cause any damage to your engine. Depending upon when your
engine was built, it may need to be charged right out of the box. If engine sounds
seem distorted or garbled at low voltages or become silent when power from the
transformer is turned off, test the battery to determine whether it should be
recharged or replaced.
Test: Put the engine in neutral and leave
the track voltage at 10-12 volts (high
enough for the lights to shine brightly) for
15 minutes.
Recharge: If the sounds are improved at
the end of the 15-minute test charge, the
battery charge has run down and can be
recharged. There are a number of ways
you can do this:
•Leave the engine in neutral with track voltage at 10-12 volts for 6-7 hours so
the battery can fully recharge (if your engine has a smoke unit, be sure it is
turned off).
•Use M.T.H.'s battery recharger (Item No. 50-1019)(sold separately) that plugs
into a wall outlet and a special port under the engine to recharge the battery
overnight without leaving it on the track.
Replace: If the sounds are not improved at the end of the 15-minute test charge,
it is time to replace the battery. Available through M.T.H. Parts:
®
(Item No. 50-1024) AA NiCad Proto-Sound Battery (Blue Casing)
®
(Item No. BG4000004) AAA NiCad Proto-Sound Battery (Green Casing)
DO NOT substitute alkaline batteries for these NiCad batteries. Using alkaline
batteries in this system can result in damage to the PS 2.0 circuit board and/or the
batteries.
**Do not use alkaline batteries for testing or checking purposes for the 3-Volt PS2
boards. Using alkaline batteries will damage the 3-Volt battery charging circuit.**
RKS SD70ACE Diesel Engine with PS-2
15
Lift Out Battery
Figure 8b.
Battery Charger
Figure 8a.

ProtoSmoke™ Unit Operation
This diesel locomotive contains a Proto-Sound 2.0 controlled smoke unit that
outputs smoke through the smokestack on the roof of the engine. The smoke unit
is essentially a small heating element and wick that soaks up and then heats a
mineral oil-based fluid that emits smoke. The smoke is then forced out of the
stack by a small electric fan. Smoke volume is controlled by the Proto-Sound 2.0
system.
With a few easy maintenance steps, you should enjoy trouble-free smoke unit
operation for years.
When preparing to run this engine, add 15-20 drops of smoke fluid through the
smokestack (see Figure 9). We recommend M.T.H. ProtoSmoke, Seuthe, LGB, or
LVTS fluids. Do not overfill the unit or the fluid may leak out and coat the interior
engine components.
To adjust the amount of smoke produced, turn the smoke unit volume control
clockwise to increase the amount of smoke, or counter-clockwise to reduce the
amount see Fig. 3c on page 4.
If you choose not to add smoke fluid (or have already added fluid but choose to
run smoke-free), turn off the smoke unit by turning the smoke unit control to the
“OFF” position, fully counter clockwise position, see Fig. 3c on page 4. Failure
either to add fluid to the smoke unit or to turn it off may damage the smoke
unit heating element and/or wicking material.
When the smoke output while running the engine begins to diminish, add another
10-15 drops of smoke fluid or turn the smoke unit off.
When storing the unit for long periods of time, you may want to add about 15
drops of fluid to prevent the wick from drying out.
After removing the engine from storage, add another 25 drops of fluid, letting the
wick soak up the fluid for 15 minutes prior to operation.
RKS SD70ACE Diesel Engine with PS-2
16
Figure 9. Filling The Smoke Unit
Add Smoke Fluid

If you experience poor or no smoke output when the smoke unit is on and has
fluid, check the wick to see if it has become hard, blackened, and unabsorbent
around the heating element. After removing the locomotive body from its chassis
(See Figure 5 on page 11), remove the smoke unit inspection cover. After
removing the inspection cover screws, lift the inspection plate away and inspect the
wick. If it is darkly discolored and hard, it should be replaced.
Replacement parts and wick replacement instructions are available directly from
the M.T.H. Parts Department (Order online: www.mth-railking.com, e-mail:
[email protected],Fax: [phone], Phone: [phone], Mail: 7020
Columbia Gateway Drive, Columbia MD 21046-1532, ).
ProtoSmoke Fluid
ProtoSmoke is the recommended fluid for M.T.H. products and can be used in
other manufacturers products as well. Choose from 12 different scents:
Christmas, Coal, Diesel, Wood Burning, Coffee, Eggs & Bacon, Vanilla, Candy
Cane, Barbeque, Pipe Smoke, Cinnamon Roll, and Apple Pie.
RKS SD70ACE Diesel Engine with PS-2
17

Troubleshooting Proto-Sound® Problems
Although Proto-Sound 2.0 has been designed and engineered for ease of use,
you may have some questions during initial operation. The following table
should answer most questions. If your problem cannot be resolved with this
table, contact M.T.H. for assistance (www.mth-railking.com, e-mail: parts@mth-
railking.com,Fax: [phone], Phone: [phone], Mail: 7020 Columbia
Gateway Drive, Columbia MD 21046-1532, ).
RKS SD70ACE Diesel Engine with PS-2
18
Starting Up
Whistle/Horn
Bell
Coupler
Remedy
Remedy
Remedy
Remedy
Remedy
When I first turn the power on, the
engine will not begin to run. I
have to turn the throttle off and
then on again to get the engine to
operate.
When I press the whistle/horn
button, the bell comes on instead.
I can’t get the horn to blow when I
press the whistle button.
I can’t get the bell to ring when I
press the bell button.
The bell won’t work on a separate
bell button.
When I try to fire the coupler, FYS
starts.
The Proto-Coupler won’t let the
engine uncouple on the fly.
The coupler does not fire or stay
coupled.
When I press the whistle button,
the bell sounds.
Reverse the transformer leads.
You may be pressing the button
too quickly. Try pressing the
whistle/horn button more slowly,
taking approximately one full
second to fully depress the button.
You may be pressing the button
too quickly. Try pressing the bell
button more slowly, taking
approximately one full second to
fully depress the button.
Reverse the transformer leads.
Check the wiring of the separate
button.
You are waiting too long between
whistle button presses.
Try lubricating the coupler knuckle
with a dry graphite lubricant. Do
NOT use oil.
The coupler needs to be cleaned.
Wipe with denatured alcohol (not
rubbing alcohol) and let dry.
This is normal behavior. To
prevent accidental high-speed
start-ups, Proto-Sound 2.0 is
programmed to start up in neutral
anytime track power has been
turned off for several seconds.

RKS SD70ACE Diesel Engine with PS-2
19
Cab Chatter
Lock-out
Volume
Battery
FYS/PSA
Remedy
Remedy
Remedy
Remedy
Remedy
Sometimes the Cab Chatter
sounds don’t play.
I can’t get the engine to run after I
power up the transformer. It sits
still with the engine sounds
running.
The engine won’t lock into
forward, neutral, or reverse.
The sounds seem distorted,
especially when the whistle or bell
is activated.
The engine will not leave the initial
neutral setting.
The FYS/PSA sounds occasionally
repeat themselves.
I get no sounds when the engine
shifts between directions.
After I turn off my transformer, my
engine continues to make sounds
before quitting.
Cab Chatter plays only in neutral
at random intervals.
The engine is locked into the
neutral position. Follow the
procedure in the “Lock into a
Direction” section.
Engine speed must be below 10
scale mph (approx. 10 volts or
less in conventional mode).
Proto-Sound 2.0 volume is set too
high. Turn the volume control knob
on the bottom of the chassis
counter-clockwise to reduce the
volume.
Check to be sure the battery is
installed and fully charged. See
the “Self-Charging Battery Back-
Up” section.
The battery may be dead or need
to be charged. See the “Self-
Charging Battery Back-Up”
section.
Proto-Sound 2.0 is designed to
continue to sound for a few
seconds after power to the track
has been shut off.
Proto-Sound 2.0 has a built-in
random number generator that
randomly selects each sound clip
to play. Because there are a
limited number of sound clips
available in each FYS/PSA
sequence, it is probable that some
of these sound clips will be
repeated from time to time.

RKS SD70ACE Diesel Engine with PS-2
20
FYS/PSA Remedy
Once in FYS/PSA, the engine
doesn’t go into reverse.
When the FYS/PSA enters its last
sequence the bell automatically
comes on.
When FYS/PSA is enabled,
pressing the whistle and bell
buttons has no effect.
I push the direction button but the
next sound clip in the sequence
does not play or the engine does
not come out of FYS/PSA after
fourth press of the direction
button.
So that FYS/PSA effects can be
as realistic as possible, Proto-
Sound 2.0 disables the reversing
unit whenever FYS/PSA is
enabled. This way the engine
remains still at its stop as the
operator cycles through the
FYS/PSAsequences.
FYS/PSA is programmed to start
ringing the bell at that point. After
approximately 12 seconds it will
automatically turn off.
Because FYS/PSA must control
various effects in each sequence,
Proto-Sound 2.0 takes control of
these sound effects until you exit
Each FYS/PSA clip must play for
approx. 30 seconds before
FYS/PSA will advance to the next
step in the FYS/PSA cycle. Wait
at least 30 seconds in each
FYS/PSA sound clip before
pressing the direction button.