American Legacy 768W User manual

LEGACY
AMERICAN
No. 768W
Passenger
Train Set
OPERATOR’S MANUAL
Compatibility
This engine will operate on any traditional
O-42 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 25 for a complete list of compatible
transformers and wiring instructions.)
PLEASE READ BEFORE USE AND SAVE

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 therisk of electric shock.
WARNING:When usingelectricalproducts,basicsafetyprecautionsshouldbeobserved,includingthefollowing:
Readthis manualthoroughlybefore usingthis device.
M.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
properlyrepaired.
Donotoperateyourlayoutunattended. Obstructedaccessoriesorstalledtrainsmayoverheat,resulting in damage toyourlayout.
Thistrainsetisintended forindooruse. Donotuseifwater ispresent. Seriousinjuryorfatalitymayresult.
l
l
l
lDonotoperatethehobbytransformerwithdamagedcord,plug,switches,buttonsorcase.
Table of Contents
Set Up Checklist................................................................................................... 3
Lubrication.............................................................................................3
Priming The Smoke Unit.......................................................................5
Checking The Battery............................................................................5
Placing The Engine On The Track.........................................................5
Basic Operation....................................................................................................6
Activating Features................................................................................6
Proto-Sound 2.0 Operating Instructions........................................................... 8
Activating Proto-Sound 2.0 Conventional Mode Features.....................8
Passenger Station Announcements (PSA).............................................9
Speed Control........................................................................................ 11
Locking Locomotive Into A Direction.................................................. 12
Reset To Factory Default.......................................................................12
Automatic Sound Effects.......................................................................12
Maintenance......................................................................................................... 13
Lubricating and Greasing Instructions...................................................13
Cleaning The Wheels, Tires and Track..................................................14
Traction Tire Replacement Instructions.................................................15
Light Bulb Replacement Instructions....................................................16
Self Charging Battery Back-Up.............................................................18
ProtoSmoke® Unit Operation................................................................20
Troubleshooting Proto-Sound® 2.0 Problems.......................................22
Transformer Compatibility and Wiring Chart.......................................25
Additional Features Accessible With The DCS System....................... 26
Service & Warranty Information...........................................................27
Limited One-Year Warranty..................................................................27

American Legacy No. 768W Set 3
Set Up Checklist
•Lubricate the locomotive
•Prime the smoke unit
•Check to see whether the battery needs to be charged for full sound effects
•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.
Lubricate Pick Up Rollers (L)
LubricateSide Rods andLinkage (L)(Both Sides)
Lubricate Axle Bushings (L)
Lubricate Axle Bushings (L)
Figure 1. Lubrication Points on the Locomotive
DO NOT
OVER OIL
Lubricate Wheel Axles
Lubricate Pickup Rollers
Figure 2: Lubricating The Passenger Car Trucks

4American Legacy No. 768W Set
Assembling ScaleTrax™
For best performance, ScaleTrax, once assembled, should be nailed or screwed onto the
layout platform. Molded hidden holes in the bottom of each section of ScaleTrax allow
you to secure them to the platform without the nails showing.
Unscrew the color-coded black and red connecting
pins on the back of the Z-750until they are loose but
have not come out. Twist the matching black and red
wires, respectively, from the ScaleTrax lock-on around
the color-matching pins on the transformer and tighten
pins to secure.
Connecting the transformer
®
To connect ScaleTrax,
line up the pieces so
that the rails are even
witheachother and the
connectors are snugly
side by side.
Press the pieces of
track firmly together
untiltheends meet and
the connectors click to
holdthe track together.
Install the Lock-On
TheScaleTrax Lock-on
snaps into the bottom of
specially molded ties
located near the ends of
each ScaleTrax track
section. Simply snap it into
place and route the wires to
your transformer.
STEP STEP STEP

American Legacy No. 768W Set 5
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 18.
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
bottom of the engine and tender where each will
have a color-coded stamp. 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.
Plug Tender Plug into
Boiler Socket at back of cab.
Figure 4: Connecting Tender Hanress
Priming The Smoke Unit
When preparing to run this engine, add 15-20
drops of smoke fluid through the smokestack.
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 engine (see Fig. 3). Failure
either to add fluid to the unit or to turn it off
may damage the smoke unit heating element
and/or wicking material.
Running the engine without a primed
smoke unit may cause damage
SmokeUnit
ON/OFF Switch
Figure 3: Smoke Unit Switch Location

6American Legacy No. 768W Set
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.
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.
Activating Features
Basic Operation
Cycle Phases
Neutral
Neutral ForwardReverse

American Legacy No. 768W Set 7
Manual Volume Control
To adjust the volume of all sounds made by this engine, turn the master volume control
knob located under one of the tender hatches on top of the tender deck (as seen in Fig. 5)
clockwise to increase the volume and counter-clockwise to decrease the volume.
Proto-Sound 2.0
VolumeAdjustmentKnob
Figure 5: Manual Volume Adjustment

8American Legacy No. 768W Set
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.
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.
Proto-Sound 2.0
Operating Instructions
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 Button Code:
Passenger Station Announcements
Fire the Rear Coupler
Fire the Front Coupler
Speed Control On/Off
Lock into a Direction
Reset to Factory Defaults
1Bell,2Horns
1Bell,3Horns
1Bell,4Horns
1 Horn, 2 Bells (from Neutral only)
1 Horn, 3 Bells
1 Horn, 5 Bells (from Neutral only)
Activating Proto-Sound 2.0 Conventional
Mode Features

American Legacy No. 768W Set 9
Your engine is equipped with a sound package of passenger station announcements that
you can play when you pull into a station. 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 PSA sufficient time to
run through each sequence.
•To cue the sound system to play the PSA, quickly but firmly tap the Bell button
once followed by 2 quick taps of the Horn 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 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 and Bell buttons until the full
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 PSA.
•After about 30 seconds, press the Direction button again to trigger the third 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 PSA sequence.
The PSA will continue, and within a few seconds, the engine and bell 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
+
Sound System Cued
to Play Passenger
Station Announcements (PSA)
Horn Horn
Bell Direction
1st
Sequence
PSA
+
Direction
2nd
Sequence
PSA
+
Direction
3rd
Sequence
PSA
+
Direction
4th
Sequence
PSA
=Operator
Controls
When Bell
Turns Off
Passenger Station Announcements (PSA)

10 American Legacy No. 768W Set
Tips on Using PSA
•You can terminate PSA at any time 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. 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 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 (or if an original
Proto-Sound engine, PSA are triggered differently and that engine's
motor-disable feature will not be active when you run PSA in Proto-Sound
2.0).
•PSA can be triggered from Neutral. It will operate the same as if triggered
while in motion except that, at the conclusion of the PSA, the engine will
depart in the next direction of travel, as opposed to the direction it was
traveling before entering Neutral.

American Legacy No. 768W Set 11
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
Place
Engine into
Neutral
Bell Bell
=SpeedControl
Two Horn Blasts
RepeattoReturn
to Normal Condition
(indicates change is made)
Speed Control

12 American Legacy No. 768W Set
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.
Horn
Place
Engine into
Desired
Direction
Horn Bell Bell Bell =Direction Lock
Two Horn Blasts
Repeat to Return
to Normal Condition
(indicateschangeismade)
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.
Reset
TwoHornBlasts
Repeat to Return
to Normal Condition
(indicateschange ismade)
Horn
Place
Engine in
Neutral =
BellBellBellBellBell
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.
Locking Locomotive Into A Direction
Reset To Factory Default
Automatic Sound Effects

American Legacy No. 768W Set 13
Maintenance
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. 6. Do not over-oil. Use only a
drop or two on each pivot point.
DO NOT
OVER OIL
GreaseScrew(G)
Grease Pivot Point (G)
Grease Pivot Point (G)
Figure 6: Lubricating The Chassis
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. 7
3. Remove the Phillips screw (marked “GREASE”) located at each set of wheels (Fig. 6)
and the gearbox cover screws (Fig. 8).
3. Use a grease tube dispenser to put a small amount (approx. 1-2 ml.) of lithium-based
grease into the gearbox and axles.
4. 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.
Lubricating and Greasing Instructions

14 American Legacy No. 768W Set
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 and a clean rag or
denatured (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. 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.
Body Mounting Screws
Body Mounting Screw
(Through hole in Leading Truck)
Figure 7: Removing The Body
Cleaning The Wheels, Tires and Track
Unscrew these screws to
access the gear box (under wire bundles)
Figure 8: Opening The Gearbox

American Legacy No. 768W Set 15
Your locomotive is equipped with two neoprene rubber traction tires on the rear set of
flanged drivers. While these tires are extremely durable, you may need to replace them at
some point.
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]).
Traction Tire Replacement Instructions

16 American Legacy No. 768W Set
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 (phone:
410-381-2580; e-mail: [email protected]; mail: 7020 Columbia Gateway Drive,
Columbia MD 21046-1532)
Headlight:
1. To replace the
headlight in this model
you will need to follow
the disassembly
instructions for smoke
unit maintenace in figure
18 on pg. 21. Once the
smoke unit is removed
you can access the wires
for the headlight (see
figure 9).
2. Gently pull the wires connected to the lights out until you can access the wire
connectors, and unplug the connectors.
3. To replace the white headlight, gently pull the wires until the bulb comes free of the
housing. Push the new bulb into place and reconnect the wires.
Firebox and Cab
Interior Lights:
1. Remove the boiler from
its chassis as shown in
Fig. 6 on pg. 13.
2. Unplug the black wires
from their connector
(located beneath a cover
plate inside the boiler).
3. Remove the firebox
Wires for headlight
Figure 9: Headlight Wire Harness
Light Bulb Replacement Instructions
Firebox and Cab Lights
Connector for Lights
Figure 10: Boiler Connector Cables

American Legacy No. 768W Set 17
light bulb by pulling it down and out of its bracket. You may find it easier to unscrew the
bracket from the boiler before removing the bulb. Replace the bulb by pushing it up and
into the bracket. You may need to use small pliers to do this.
4. Remove the cab interior light by pulling gently on the wire until the bulb comes free of
its housing. Push the replacement bulb into position.
5. Reassemble in reverse order, being careful not to pinch any wires.
Tender Light:
1. Remove the body from the chassis by removing the 6 screws shown in Fig. 10.
2. Unplug the wire from the connector.
3. Unscrew the bracket that houses the light bulb from inside the tender.
4. Gently pull the bulb to remove it and push the replacement bulb into place.
5. Reassemble in reverse order, being careful not to pinch any wires.
Tender Body Mount Screws
Front
Rear
Figure 11: Removing The Tender Body
Passenger Car Interior Bulb
Replacement Instructions
The passenger car interior lights are located in two places. Lights can be found under the
car body roof or in the vestibules connecting the cars together. Once accessed, the lights
are easy to remove and replace when burned out. Replacement bulbs are available
directly from the M.T.H. Parts Department.

18 American Legacy No. 768W Set
Self Charging Battery Back-Up
The special NiCad 7-cell 8.4v 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.
To access the car body bulbs, remove the two screws attaching the car body roof to the
car body as seen in Figure 12. Once the screws are removed, llift the roof away from the
car body to expose the bulb. To remove the bulb, simply unscrew.
The vestibule bulbs are easily visible when the vestibules are separated from the car
body.
Remove two screws
Figure 12: Roof Removal
Unscrew bulb from socket
Figure 13: Light Bulb Replacement

American Legacy No. 768W Set 19
Test: Put the engine in neutral and leave the track voltage at 10-12 volts (high enough
for the lights to shine brightly and the engine to move steadily) 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 (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. 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.
Unhook Wires, Remove
and Replace Battery
AC Battery Recharging Jack
Figure 14: Replacing The Battery And Locating The Battery Recharging Jack

20 American Legacy No. 768W Set
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. 15). 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 locomotive cab (see Fig. 17).
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.
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. To remove the smoke unit you will first have to remove the boiler shell
(by removing the body mounting screws shown in Fig. 7 on pg. 14), board and bracket
that block the smoke unit assembly from being accessed. To do this, follow these
instructions:
Add Smoke Fluid
Figure15
ProtoSmoke® Unit Operation
Smoke Unit
ON/OFFSwitch
Figure16