MTHTrains Rail King Imperial Series User manual

4-8-4 GS-2/GS-4
Steam Locomotive
OPERATOR’S MANUAL
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
23 for a complete list of compatible
transformers and wiring instructions.)
PLEASE READ BEFORE USE AND SAVE
Passenger Station Announcement
Freight Yard Sound

Table of Contents
Set Up Checklist...........................................................................................................
Lubrication.......................................................................................................
Priming the Smoke Unit.................................................................................
Placing the Engine on the Track...................................................................
Checking the Battery.......................................................................................
Basic Operation.............................................................................................................
Activating Features...........................................................................................
Manual Volume Control..................................................................................
Proto-Sound 2.0 Operating Instructions................................................................
Activating Proto-Sound 2.0 Conventional Mode Features........................
Passenger Station Annoucements (PSA)/
Freight Yard Sound (FYS)..............................................................................
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.......................................................
Headlight Replacement Instructions.............................................................
Self Charging Battery Back-Up......................................................................
ProtoSmoke™ Unit Operation......................................................................
Troubleshooting Proto-Sound® 2.0 Problems............................................
Transformer Compatibility and Wiring Chart..............................................
Additional Features Accessible with the DCS Remote Control System...
Service & Warranty Information....................................................................
Limited One-Year Warranty...........................................................................
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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 usingelectricalproducts,basic safetyprecautions shouldbe observed,including thefollowing:
Readthis manualthoroughly beforeusing thisdevice.
lM.T.H. recommends that all users and persons supervising use examine the hobby transformer and other electronic equipment
periodicallyfor conditionsthatmayresultintheriskoffire,electricshock,orinjurytopersons,suchasdamagetotheprimarycord,
plug blades, housing, output jacks or other parts. In the event such conditions exist, the train set should not be used until properly
repaired.
lDonot operateyour layoutunattended. Obstructed accessoriesor stalledtrains mayoverheat, resultingin damagetoyourlayout.
lThistrain setis intendedfor indooruse. Do notuse ifwater ispresent. Seriousinjuryorfatality mayresult.
lDonot operatethe hobbytransformer withdamaged cord,plug, switches,buttons orcase.
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.
Priming the Smoke Unit
When preparing to run this engine, add 15-20
drops of smoke fluid through the smokestack
(see Fig. 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 control
by turning the smoke unit control fully
counter-clockwise. 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.
RailKing 4-8-4 GS-2/GS-4 Steam Engine
3
DO NOT
OVER OIL
DO NOT
OVER OIL
DO NOT
OVER OIL
Figure 1. Lubrication Points on the Locomotive
Running the engine without a primed
smoke unit may cause damage
Figure 2. Smoke Unit Control Location
Smoke Unit Control

Placing the Engine on the Track
Place the engine on the track, then insert the reverse unit plug that extends out of
the tender into the receptacle at the back of the boiler cab (Figure 3. WARNING:
DO NOT CONNECT THIS ENGINE TO A TENDER FROM ANOTHER
ENGINE; IT MAY CAUSE SERIOUS DAMAGE. Look at the bottomof the
engine and tender where each will have a sticker. If they match you may connect
those two pieces; if not, don’t.
Connect the draw bar between the engine and tender. The draw bar hole located
farthest from the tender is for applications such as display. The second hole is for
normal operation on the track.
At this point, you are ready to begin running your engine.
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 16.
RailKing 4-8-4 GS-2/GS-4 Steam Engine
4
Plug Tender Plug into
Boiler Socket at back of cab
Figure 3.

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.
Cycle Phases
Neutral
Neutral ForwardReverse
RailKing 4-8-4 GS-2/GS-4 Steam Engine
5

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.
RailKing 4-8-4 GS-2/GS-4 Steam Engine
6
Figure 4. Manual Volume Control
Manual Volume Control

®
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 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 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.
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:
Passenger Station Annoucements
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 Whistles
1 Bell, 3 Whistles
1 Bell, 4 Whistles
1 Whistle, 2 Bells (From Neutral Only)
1 Whistle, 3 Bells
1 Whistle, 5 Bells (From Neutral Only)
RailKing 4-8-4 GS-2/GS-4 Steam Engine
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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
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.
+
Sound System Cued to Play
Freight Yard or Passenger
Station Sounds (FYS)/(PSA)
Horn/
Whistle
Bell
Direction
1st
Sequence
FYS/PSA
+
Direction
2nd
Sequence
FYS/PSA
+
Direction
3rd
Sequence
FYS/PSA
+
Direction
4th
Sequence
FYS/PSA
=Operator
Controls
When Bell
Turns Off
Horn/
Whistle
Horn/
Whistle
RailKing 4-8-4 GS-2/GS-4 Steam Engine
8

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 p. 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 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.
Horn Horn
Fire
Rear
Coupler
=
Horn
Bell
RailKing 4-8-4 GS-2/GS-4 Steam Engine
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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 Horn 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 button one time then quickly tap the Bell button two times,
allowing approximately ½ second to lapse between each quick button press. Two
horn blasts will indicate that the engine has made the change. Repeat the 1 horn, 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.
Horn Horn
Fire
Front
Coupler
=
Horn Horn
Bell
Horn
Place
Engine into
Neutral
Bell Bell
=
Speed Control
Two Horn Blasts
(indicates change is made)
Repeat to Return
to Normal Condition
RailKing 4-8-4 GS-2/GS-4 Steam Engine
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Locking Locomotive 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 button once followed
by three quick taps of the Bell button, allowing approximately ½ second to lapse
between each quick button press. Two horn 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, 3 bells code to return the engine to its normal
condition, even if the engine is kept without power for extended periods of time.
Reset To Factory Default
To override the settings you currently have assigned to the engine and reset it to its
factory defaults, while in Neutral tap the Horn 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 blasts will indicate that the engine has
made the change.
Automatic Sound Effects
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.
Horn
Place
Engine into
Desired
Direction
Horn
Bell Bell Bell
=
Direction Lock
Two Horn Blasts
(indicates change is made)
Repeat to Return
to Normal Condition
Reset
Two Horn Blasts
(indicates change is made)
Repeat to Return
to Normal Condition
Horn
Place
Engine in
Neutral =
BellBellBellBellBell
RailKing 4-8-4 GS-2/GS-4 Steam Engine
11

Maintenance
Lubricating and Greasing Instructions
The engine should be well oiled and greased in order to run properly.
You should regularly lubricate all side rods, linkage components and
pickup rollers to prevent them from squeaking. Use light household
oil and follow the lubrication points marked “L” in Fig. 2. 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. To access the gear box and axles, do the following:
1. Turn the engine upside down.
2. Remove the boiler by removing the body mounting screws shown in Fig. 6
3. Remove the Phillips screw (marked “GREASE”) located at each set of wheels
(Fig. 6) and the gearbox cover screws (Fig. 7).
4. Use a grease tube dispenser to put a small amount (approx. 1-2 ml.) of lithium-
based grease into the gearbox and axles.
5. Replace the screws and reassemble the boiler.
You should also grease the leading and trailing locomotive truck tongues to enhance
their ability to slide on the chassis. Follow the grease points shown on Fig. 6.
DO NOT
OVER OIL
DO NOT
OVER OIL
DO NOT
OVER OIL
Figure 5. Lubricating the Locomotive
RailKing 4-8-4 GS-2/GS-4 Steam Engine
12

Figure 7. Motor Gearing Grease Plate Screws
Figure 6. Removing the Body and Lubricating the Grease Points
RailKing 4-8-4 GS-2/GS-4 Steam Engine
13
Grease Pivot Point
Body Mount Screws
Body Mount Screws
Body Mount Screws
Grease Screws
Figure 6. Body Mount Screws and Grease Points
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)
Track Cleaning
Block (40-1099)
Maintenance Kit (30-50010)

Traction Tire Replacement Instructions
1. Remove the side rods from the wheels in order to slip the new tire over the
grooved drive wheel. Make sure to note the position of all rods before removing.
2. 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.
3. 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.
4 . 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.
5. 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.
6. Reinstall the side rods in the same positions as noted. Failure to align rods
may cause binding or damage to the drive system.
One set of replacement tires is packaged with your model. Additional sets
are available directly from the M.T.H. Parts Department (order online:
www.mth-railking.com, e-mail: [email protected]; mail: 7020 Columbia
Gateway Drive, Columbia MD 21046-1532, FAX: [phone]).
RailKing 4-8-4 GS-2/GS-4 Steam Engine
14

Headlight Replacement Instructions
The locomotive’s lights are controlled by a constant voltage circuit in the engine.
They are easy to remove and replace when they burn out. See the diagrams and
directions below for instructions on accessing and replacing the light bulbs in this
locomotive.
You can obtain replacement bulbs directly from the M.T.H. Parts Department
(order online: www.mth-railking.com, e-mail: [email protected]; mail: 7020
Columbia Gateway Drive, Columbia MD 21046-1532, FAX: [phone]).
1. To replace the headlight in this model you will need to follow the disassembly
instructions for greasing the engine in figure 6 on pg. 13. Once the boiler has been
removed you can access the headlight(see figure 8).
2. Remove the bulb by gently unscrewing it counter-clockwise.
3. Reassemble in reverse order, being careful not to pinch any wires.
Headlight
Figure 8
RailKing 4-8-4 GS-2/GS-4 Steam Engine
15

Tender Shell Screws
Figure 9
RailKing 4-8-4 GS-2/GS-4 Steam Engine
16
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 damamge 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.**

Battery Pack
Figure 10
Figure 11. Battery Recharging Port
RailKing 4-8-4 GS-2/GS-4 Steam Engine
17
Battery charger port

™
ProtoSmoke Unit Operation
This Premier steam locomotive contains a self-powered 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 a harmless 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 Fig. 12). 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 the fluid (or have already added the fluid but choose to
run smoke-free), turn off the smoke unit switch located under the tender floor (see
Fig. 13). Failure either to add fluid to the unit or to turn it off may damage the
smoke unit heating element and/or wick 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.
Figure 12 Figure 13
RailKing 4-8-4 GS-2/GS-4 Steam Engine
18
Add Smoke Fluid Smoke Unit Control

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 theheating element. To remove the smoke unit you will first have to
remove the boiler shell (by removing the body mounting screws shown in Fig. 6
on pg. 13). To do this, follow these instructions:
1. Once the boiler has been removed, locate the smoke unit assemby (see Figure 14).
2. Use a phillips head screwdriver to remove the inspection cover screws as seen in
Figure 15.
3. After removing the inspection cover, 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 phone: (order online: www.mth-railking.com, e-mail:
[email protected]; mail: 7020 Columbia Gateway Drive, Columbia MD
21046-1532, FAX: [phone]).
Smoke Unit Location
Figure 14
Remove these two
Screws to Inspect
the Smoke Wick
Figure 15
RailKing 4-8-4 GS-2/GS-4 Steam Engine
19
™
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

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; mail: 7020 Columbia Gateway Drive, Columbia MD 21046-1532,
FAX: [phone]).
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.
When I press the whistle button,
the bell comes on instead
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.
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.
RailKing 4-8-4 GS-2/GS-4 Steam Engine
20