Rail King DOODLEBUG User 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
BasicOperation 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. Youwillwant
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
shutsdown.

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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 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.