Rail King DOODLEBUG Operating Instructions Manual

RAILKING DOODLEBUG

DIESEL ENGINE

OPERATING

INSTRUCTIONS

Thank you for purchasing the RailKing Doodblebug Diesel Engine. This RailKing Diesel Engine contains state-of-the-art electronics with many built-in automatic features

for incredibly realistic operation. Despite these advanced features, the locomotive is easy to operate with any compatible standard AC transformer (see the compatibility

chart on page 17), and is completely compatible with most other 3-rail locomotives, rolling stock, and accessories.

This locomotive is equipped with Proto-Sound 2.0 with Digital Command System (DCS). This new system will allow you to operate your locomotive in Command mode (when used with the DCS Remote Control System, sold separately) or Conventional mode. Conventional operating features are described in the following pages, while the DCS operating features are covered in the set of operating instructions that accompanies the DCS equipment. Conventional Mode operation of this locomotive is much simpler than operation of original Proto-Sound engines. For your own safety and that of your equipment, please read the instructions before you operate this engine.

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RailKing Doodlebug Electric Engine

Table of Contents

Initial Lubrication 3 Basic Operation 3

Throttle 3 Operation Buttons 3

Volume Control 4

Proto-Sound 2.0 Operation 4

Activating Proto-Sound 2.0 Conventional Mode Features 4 Passenger Station Announcements (PSA) 5

Tips on Using PSA 6 Proto-Coupler® Operation 7

Speed Control 7 Lock into a Direction State 8

Reset to Factory Defaults 8 Automatic Sounds 8

Maintenance 9

Lubrication and Greasing Instructions 9 Cleaning the Wheels, Tires and Track 10 Locomotive Traction Tire Replacement 11 Locomotive Light Bulb Replacement 12 Self-Charging Battery Back-Up 13

Troubleshooting 14 Compatibility 16

Transformer Compatibility Chart 17 Additional Features with DCS Remote Control System 18

Safety Precautions 20 Service and Warranty Information 24

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RailKing Doodlebug Electric Engine

INITIAL LUBRICATION

Although the engine was lubricated at the factory, it is important that you lubricate the chassis before operation. Lightly grease the outside idler and drive gears (marked “G” in Fig. 3 on page 10) to prevent them from squeaking. Use light household oil and follow the lubrication points marked “L” in Fig. 2 on page 9. Do not over-oil. Use only a drop or two on each pivot point.

At this point, you are ready to put your engine on the track and begin running it.

BASIC OPERATION

Throttle – Throttle up the power to your track by either firmly pressing the

Direction button on your transformer or remote once or quickly dropping and advancing the throttle to put the engine in forward.

Operation Buttons

Use the operation buttons on your transformer or remote as described below. Horn/Whistle - To sound the horn, firmly press the Horn/Whistle button. The

horn will sound for as long as you continue to depress the button. It will stop when you release the button.

Bell - To sound the 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 your turn it on until you press and release the button again to turn it off.

Direction – Your train is programmed to start in neutral. To put the engine into forward and then to change the direction of the train or to put it into neutral, firmly press and release the Direction button on your transformer. Just as you must stop your car between forward and reverse, this engine will not go

directly from forward to reverse; it goes into neutral between directions. If the train has been moving forward, the first press of the Direction button will put the train from forward into neutral, the second press into reverse, the third

press back into neutral, and the fourth back into forward. To prevent accidental high-speed start-ups, this engine is programmed to restart in neutral each time

the track voltage is turned off for 10 seconds or more.

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RailKing Doodlebug Electric Engine

PROTO-SOUND

2.0 OPERATING INSTRUCTIONS

Because Proto-Sound 2.0 is an all-new system developed by M.T.H.’s own research and development team, it operates differently from original Proto-Sound. Most Proto-Sound 2.0 features are automatically enabled, and the reset state has been eliminated, so there is no need to program features as with original Proto-Sound. Although the new system is easier to operate than original Proto-Sound, you should read these instructions thoroughly before using Proto-Sound 2.0 features in order to prevent harm to yourself or your equipment.

Activating Proto-Sound 2.0 Conventional Mode Features:

Proto-Sound 2.0 features are activated by sequences of Bell and 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 whistle or ring the bell, you should press the buttons for a shorter time (½ second); you may need to practice your timing to make this work smoothly.

Feature to Be Activated:

Passenger Station Announcements 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)

Volume Control

– To adjust the volume of all sounds made by this engine,

turn the master volume control knob located under the engine clockwise to increase the volume and counter-clockwise to decrease the volume (see Fig. 1).

Volume

Adjustment Knob

Figure 1. Location of the Proto-Sound 2 Volume Adjustment Knob

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RailKing Doodlebug Electric Engine

Passenger Station Announcements (PSA):

Your engine is equipped with a sound package of Passenger Station Announcements that you can play when you pull into a freight yard. Each sequence described below will play as long as it is left on, randomly generating sounds, but be sure to allow time between the button pushes described below to allow the PSAs sufficient time to run through each sequence.

1. To cue the sound system to play the PSA, quickly but firmly press the Bell button once followed by 2 quick presses of the Whistle button while the engine

is moving. As soon as you have keyed in this code, you will hear the announcement for the upcoming stop and the bell will begin to ring.

2. Press the Direction button or drop and advance the throttle once to stop the engine. This will trigger the first sequence of PSAs. 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 Whistle and Bell buttons until the full PSA sequence is complete.

3. After waiting at least five seconds for that sequence to run, press the Direction button again to trigger the second sequence of PSAs.

4. After at least another five seconds, press the Direction button again to trigger the third PSA sequence.

5. Again, after allowing about 5 seconds for the third sequence to run, press the Direction button one more time to trigger the fourth and final PSA sequence. You will know it is the final sequence when you hear the “All

Aboard!” call. The bell will begin to chime 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 whistle

buttons and can ring the bell or blow the whistle as usual.

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RailKing Doodlebug Electric Engine

Tips on Using PSAs

• You can terminate PSA at anytime by turning off power to the track for 15 seconds.

• You do not have to be in Forward to use 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 PSA even if you are double-heading with another engine regardless of whether the second engine is equipped with a Proto-Sound 2.0 PSA module. If the second engine is not equipped with PSA at all, you must remember not to leave the

throttle at a high voltage level once you have stopped the engine to run the PSA. Otherwise, the engine without PSA will begin

vibrating on the track as its motors strain to move the train, since they cannot be automatically disabled during the PSA cycle. If the second engine (whether original Proto-Sound or Proto-Sound

2.0) is equipped with PSAs, you may choose to disable it when used in double-heading operations, so you will not experience

competing PSA sounds. To disable PSAs in an original Proto-Sound engine, see the operating instructions for that engine.

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RailKing Doodlebug Electric Engine

Proto-Coupler® Operation

This locomotive is equipped with a coil-wound Proto-Coupler for remote uncoupling action. Because the Proto-Coupler is controlled through the Proto-Sound 2.0 microprocessor, it does not require an uncoupling track section or modification to your layout to function. Use the codes listed below to fire the coupler.

Rear Coupler:

To fire the rear coupler, quickly press the Bell button once followed immediately by three pushes of the Whistle button. The sound of the liftbar

and air line depletion will play, and the knuckle will be released.

Front Coupler:

To fire the front coupler, quickly press the Bell button once followed immediately by four pushes of the Whistle button. 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.

To turn speed control on and off, put the engine in neutral, then press the transformer’s Whistle button one time then immediately press the Bell button two times. Two horn blasts will indicate that the engine has made the change. Repeat the 1 whistle, 2 bells code to return it to the other state. 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.

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RailKing Doodlebug Electric Engine

Lock into a Directional State:

You can lock your engine into a directional state (forward, neutral, or reverse) to prevent it from changing 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 speed (< 10 scale mph), and quickly but firmly press your remote’s Whistle

button once followed immediately by three presses of the Bell button. 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 whistle, 3 bells code to return the engine to its normal state, even if the engine is kept without power for extended periods of time.

Reset to Factory Defaults:

To override the settings you currently have assigned to the engine and reset it to its factory defaults, quickly press the Whistle button once, followed immediately by five quick pushes of the Bell button.

Automatic Sounds:

Certain Proto-Sound 2.0 sound effects automatically play in programmed conventional mode conditions:

Squealing Brakesplay any time the engine’s speed decreases rapidly.

Cab Chatter plays when the engine idles in neutral.

Engine Start-up and Shut-down sounds play when the engine starts up and

shuts down.

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RailKing Doodlebug Electric Engine

MAINTENANCE

Lubrication and Greasing Instructions

The engine should be well oiled and greased in order to run properly.

You should regularly lubricate the 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. 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. Remove the screws from the chassis, as seen in Figure 3, then lift the body away from the chassis.

2. Remove the black Phillips motor mount screw located on the bottom of the truck block underneath where the pickup roller sits.

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.

Lubricate Pick Up Rollers

Figure 2. Lubrication Points on the Locomotive

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RailKing Doodlebug Electric Engine

5. Repeat the procedure for the other motor and truck

6. Reassemble the chassis and body, being careful that the wires are not caught between the body and chassis, as this can lead to a short that may damage the

electronics beyond repair.

It is also a good idea to lubricate the outside truck block idler and drive gears with grease occasionally. Add grease to the points marked with “G” in Figure

3.

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 as well as prematurely wear out the neoprene traction tires. Wheels and tires can be cleaned using denatured alcohol (not rubbing alcohol), which can be found in home improvement stores, applied with a cotton swab.

Occasional cleaning of the track will also help to ensure good electrical contact and to prolong the life of your engine’s tires. To clean the track, use a clean

rag and denatured alcohol (not rubbing alcohol). 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.

Body Mount Screws Body Mount Screws

Motor Mount Screw

Grease Gears (G)

Figure 3. Greasing Points on the Locomotive and the Locations of the Body Mounting Screws.

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RailKing Doodlebug Electric Engine

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.

Turn your engine upside down. If there are visible Phillips screw heads between the truck frame and truck block (see Fig. 4), go to step A. If not, go to

step B.

A. Remove the two Phillips screws that attach

the truck sides to the truck block.

B. Remove the trucks from the chassis and the

truck sides from the trucks in order to slip the new

tire over the grooved drive wheel. See Fig. 3 for which screws you must remove to do this.

Then:

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 the reverse order.

Truck Screws

Figure 4. Area to Look for Screws

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RailKing Doodlebug Electric Engine

One set of replacement tires is packaged with your model. Additional tires are available directly from the M.T.H. Parts Department (phone: 410-381-2580; fax: 410-423-0009; e-mail: [email protected]; mail: 7020 Columbia Gateway Drive, Columbia MD 21046-1532).

Locomotive Light Bulb Replacement

To replace the light bulb in the locomotive, follow these instructions:

Follow the cab removal instructions found in the “Lubrication and Greasing” section of this booklet. Once the body has been removed, remove and replace the bulb as shown in Fig. 5.

You can obtain replacement bulbs directly from the M.T.H. Parts Department.

Interior Lamps

Figure 5. Locate the Burned-Out Lightbulbs in the Locomotive. To Replace the Bulb, Pull the Bulb Out to remove and Install a New One by Reversing the Process

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RailKing Doodlebug Electric Engine

Self-Charging Battery Back-Up

The special NiCad 7-cell 8.4v self-charging battery in this engine improves performance at any speed. It ensures that power to the sound system will

remain on during directional changes, or when traveling over dirty track or switches. The self-charging battery system is automatically turned on or off

whenever track power is turned on or off.

Track power (when applied) recharges the battery, which should last for up to five years, and the special NiCad battery is a dry battery that should not leak or

cause any damage to your engine. However, even this special battery will eventually wear down and need to be replaced. When you notice that your 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.

• Put the engine in neutral and leave the track voltage at 12 volts for 15 minutes.

• If the garbled or distorted sounds are reduced, the battery charge has run down and can be recharged. Do this by leaving the engine in neutral with track voltage at 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). Or you can remove the battery (see Fig. 6 below) and charge it in any standard slow charge battery

recharger, following the recharger’s directions.

• If the sounds are not improved at the end of the 15 minute test charge, it is time to replace the battery (see Fig. 6 below) . Contact the M.T.H. Parts

Department (phone: 410-381-2580; e-mail: [email protected]; mail: 7020 Columbia Gateway Drive, Columbia MD 21046-1532) for a replacement battery. A standard 9v alkaline battery can be substituted until your

replacement arrives, but since alkaline batteries cannot be recharged, it will eventually wear down. Do NOT use a 6-cell 7.2v battery like those found in

most convenience stores.

Unhook wires,

remove battery,

and replace

Figure 6. Unhook the Battery Leads, Remove the Battery and Replace with a New One.

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RailKing Doodlebug Electric Engine

Troubleshooting Proto-Sound® 2.0 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 (telephone: 410-381-2580; fax: 410-423-0009; [email protected], 7020 Columbia Gateway Drive,

Columbia MD 21046-1532).

Starting Up

Horn

Bell

Coupler

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 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 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, ProtoSound 2.0 is programmed to start up in neutral anytime track power has been turned off for several seconds. See the "Basic Operation" section for more details.

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RailKing Doodlebug Electric Engine

Cab Chatter

Lock-out

Volume

Battery

PSA

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 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.

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 PSA sequence, it is probable that some of these sound clips will be repeated from time to time.

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RailKing Doodlebug Electric Engine

PSA Remedy

Once in PSA, the engine doesn’t go into reverse.

When the PSA enters its last sequence the bell automatically comes on.

When 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 PSA after fourth press of the direction button.

So that PSA effects can be as realistic as possible,

Proto-Sound 2.0

disables the reversing unit whenever PSA is enabled. This way the engine remains still at its stop as the operator cycles

through the PSA sequences.

PSA is programmed to start ringing the bell at that point. After

approximately 12 rings of the bell, it will automatically turn off.

Because PSA must control various effects in each sequence, ProtoSound 2.0 takes control of these sound effects until you exit PSA.

Each PSA clip must play for approx. 30 seconds before PSA will advance to the next step in the PSA cycle. Wait at least 30 seconds in each PSA sound clip before pressing the direction button.

Compatibility

This engine will operate on any traditional O-31 or larger O Gauge track system, including M.T.H.’s RealTrax® or ScaleTrax™ or traditional tubular

track. It is also compatible with virtually most standard AC transformers. (See page 17 for a complete list of compatible transformers and wiring

instructions.)

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RailKing Doodlebug Electric Engine

Transformer Compatibility and Wiring Chart

Note that many of the operational commands described in these instructions require a bell button, so if your transformer does not have its own bell button, you should consider adding one to get the full benefit of the system.

Transformer

Model

Center Rail Outside Rail

Min/Max.

Voltage

Power

Rating

Transformer

Type

Lionel 1032 U A 5-16v 90-Watt Standard

Lionel 1032M U A 5-16v 90-Watt Standard

Lionel 1033 U A 5-16v 90-Watt Standard Lionel 1043 U A 5-16v 90-Watt Standard

Lionel 1043M U A 5-16v 90-Watt Standard

Lionel 1044 U A 5-16v 90-Watt Standard Lionel 1053 U A 8-17v 60-Watt Standard Lionel 1063 U A 8-17v 60-Watt Standard

All-Trol Left Terminal Right Terminal 0-24v 300-Watt Electronic

Dallee Hostler Left Terminal Right Terminal Electronic

Lionel LW A U 8-18v 75-Watt Standard

Lionel KW A or B U 6-20v 190-Watt Standard

Lionel MW

Outside Track

Terminal

Inside Track

Terminal

5-16v 50V.A. Electronic

Lionel RS-1 Red Terminal Black Terminal 0-18v 50V.A. Electronic

Electronic

Lionel RW U A 9-19v 110-Watt Standard

Lionel SW U A Unknown 130-Watt Standard

Lionel TW

U A 8-18v 175-Watt Standard

Lionel ZW

Lionel Post-War

Celebration

Series ZW

A,B,C or D

U

Common

8-20v

0-20v

275-Watt

135/190 Watt

Standard

MTH Z-500 Red Terminal Black Terminal 0-18v 50-Watt Electronic MTH Z-750 Red Terminal Black Terminal 0-21v 75-Watt Electronic

MTH Z-4000 Red Terminal Black Terminal 0-22v 390-Watt Electronic

* Conventional Mode Only

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RailKing Doodlebug Electric Engine

Additional Features Accessible with the DCS Remote Control System:

While conventional mode operation of a Proto-Sound 2.0 engine yields wonderfully realistic sound and several train control features, command mode

operation allows the user to access a world of command functions never before accessible to O Gauge railroaders. With the addition of the DCS Remote

Control System (including a DCS remote handheld and Track Interface Unit) users gain many advanced features, including:

• DCS Proto-Speed Control-Establishes desired locomotive speed in scale miles per hour increments via a thumbwheel control and allows operator to set maximum speed and acceleration/deceleration rates.

• Locomotive Lighting Control-Independently controls locomotive headlights, marker and interior lights, and ditch lights.

• Emergency Stop-Single button push deactivates all layout operation.

• One Touch Global Mute/UnMute-Single button mutes or unmutes all DCS-controlled locomotives’ user-defined actions, including sound, lights, and

smoke.

• Proto-Dispatch Operation-Public Address-like feature allows users to speak through locomotive speaker during operation .

• Proto-Cast-Allows users to play audio recordings through locomotive speaker during operation.

• Proto-Doppler Sound Effects Set Up-Users can configure locomotive for Doppler Operation, including setting distance points for Doppler start, repeat, and stop modes .

• Independent Volume Control of Engine Sounds, Bell, Horn & Whistle for each Locomotive .

• Control up to 50 different DCS-equipped locomotives at one time with multiple TIUs.

• Proto-Effects™ Set Up-User can select individual Proto-Effects™ operations to be active or inactive, including cab chatter, train wreck sounds, coupler

sounds, and wheel clickety-clack sounds.

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RailKing Doodlebug Electric Engine

• Direction Control Set Up-User can set initial individual start-up direction (start in forward or reverse) for double-heading operations.

• Locomotive Consist Set-up-User can determine locomotive values for consist make-ups, allowing multiple locomotives belonging to a consist to operate together.

• Query Locomotive Information-User can query locomotive programming to learn locomotive address and engine data information, including scale miles traveled.

• User Can Query, Set and Operate Track and Accessory Interface Units for Programming Digital Command Operations for up to 250 Accessories and 250

Individual Switches.

• User Can Script, Record and Playback Train Routes.

Operating instructions for all DCS Command features will accompany the DCS remote control equipment.

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RailKing Doodlebug Electric Engine

CAUTION: Electrically Operated Product:

Not recommended for children under 10 years of age. M.T.H. recommends adult supervision with children ages 10 - 16. As with all electric products, precautions should be observed during handling and use to reduce the risk of electric shock.

WARNING: When using electrical products, basic safety precautions should be followed including the following:

Read this manual thoroughly before using this device.

M.T.H. recommends that all users and persons supervising use examine the hobby transformer 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 transformer should not be used until properly repaired.

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RailKing Doodlebug Electric Engine

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