M.T.H. F-3 POWERED B-UNIT User manual

R
ELECTRIC TRAINS
MTH F-3 POWERED B-UNIT
OPERATING INSTRUCTIONS
Thank you for purchasing the MTH Electric Trains F-3 B-Unit
locomotive. This ¼” scale reproduction of the famous F-3 B-Unit
locomotive measures over 13 1/2” in length and weighs over 3.5 pounds.
Despite its scale size, the locomotive is capable of operating on O-31 3-rail
track with any compatible AC transformer (see the chart on page 8 for a
complete list of compatible transformers and wiring instructions) and is
completely compatible with past MTH F-3 AA and ABA diesel sets.
The locomotive is equipped with several deluxe features that are simple
and fun to operate. Each feature is described among the following pages
which should be read before the engine is operated. For those of you who
can’t wait to get started, the Quick Start Basic Operating Instructions
found on Pages 3 and 4 should be read so that you understand the basics of
the operating system.

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MTH F-3 B-Unit Operating Manual
Table Of Contents
QUICK START - BASIC OPERATION 3
DCRU® Reverse Unit Operation 3
USING YOUR POWERED F-3 B UNIT WITH PFA/FYS
EQUIPPED F-3 AA OR ABA 4
OIL & LUBRICATION INSTRUCTIONS 5
TRACTION TIRE REPLACEMENT INSTRUCTIONS 6
O-31 OPERATION 7
TRANSFORMER WIRING CHART 8
PARTSLIST 9
EXPLODED VIEW 10
SERVICE AND WARRANTY INFORMATION 11
HOW TO GET SERVICE 11
LIMITED ONE YEAR WARRANTY 11

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MTH F-3 B-Unit Operating Manual
QUICK START - BASIC OPERATION
The MTH F-3 B Unit contains state-of-the art electronics with several
built-in automatic features for incredibly realistic operation. The F-3
B-Unit is easy to operate with your existing MTH F-3 AA or ABA units
using any compatible standard AC transformer (see the compatibility chart
on page 8). The F-3 powered B-Unit is controlled by a DCRU® electronic
reverse unit which unit operates in the same manner that all reverse units
function by using forward, neutral and reverse states that are entered each
time the throttle is turned on and off or by using the transformer direction
switch (if so equipped). Simply plug the B-Unit wire harness into the
existing sockets of the F-3 AA or ABA set to allow Proto-Coupler®
equipped engines and directional lighting systems to function. Once
connected, advance the transformer throttle to cycle all AA and B units
together from RESET to Forward as explained in the DCRU section below.
DCRU® REVERSE UNIT
As mentioned in the Basic Operating section, the engine is controlled by a
DCRU® reverse unit that contains the standard forward-neutral-reverse
states found on most reverse units. However, when power is first applied to
the track, the reverse unit begins in RESET or what seems like a neutral
state. Power must be interrupted again to get the locomotive to enter the
forward state. The system will enter RESET whenever power to the track is
off for three or more seconds. NEUTRAL should be referred to as the state
between Forward and Reverse.
Because the ProtoSound® system or DCRU® reverse unit found in your
powered MTH F-3 A unit is not directly connected to the DCRU® unit in
your powered F-3 B-Unit, you
must cycle the power on and off
slowly to maintain proper
synchronization between each
powered unit’s reverse unit. If
the units should become
unsynchronized, simply shut
down power for three or more
seconds. Upon repowering, each
unit should come up in RESET. If you choose to operate your existing F-3
A units in a “locked-out” state, a lockout switch on the powered F-3 B-Unit
has been provided so that you can manually “lock-out” the B-Unit in the
same direction the powered A Units are configured.
RESET
Neutral
Reverse
Neutral
Forward
Figure 2: DCRU™ Cycle Phases

USING THE POWERED F-3 B-UNIT WITH
PFA/FYS EQUIPPED MTH F3 AA OR ABA
You can utilize the PFA/FYS that came equip on previous MTH Premier F3
AA or ABA by reading the following instructions. Refer to your Premier F3
AA or ABA for operation instruction of PFA/FYS. Your MTH Premier
Powered F3 B-unit has a DCRU installed in it, which is not directly connected
to the ProtoSound of your powered A unit. Because the Powered B-unit is not
directly connected to the ProtoSound, the Powered B-unit will cycle its
directional states while the ProtoSound A unit is playing the PFA/FYS events.
To operate the Powered F-3 B-unit with your ProtoSound A unit, the only
thing to remember is not to set the voltage on the transformer too high, not
above 8-10 volts. If the voltage is set to high, the Powered B-unit will begin
vibrating on the track, as its motors will be turning. Since the directional
cycles of the DCRU are insink with the number of events played during the
PFA/FYS, the Powered B-unit will start in the same direction as the
ProtoSound A unit after the PFA/FYS has finished playing.
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MTH F-3 B-Unit Operating Manual

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MTH F-3 B-Unit Operating Manual
OIL & LUBRICATION INSTRUCTIONS
In order for the engine to perform correctly and quietly, it is important that
the chassis be lubricated before operation. Lubrication should include all
truck block bushings and pickup rollers to prevent them from squeaking.
Use light household oil and follow the lubrication points marked “L" in Fig.
3 below.
The locomotive’s internal gearing in both power trucks has been greased at
the factory and shouldn’t need additional grease until after 50 hours of
operation or one year whichever comes first. Grease cannot be added to the
internal gearing until the body is removed from the chassis which is held in
place by four Phillips screws. The screws are located on each end of the
chassis as seen in Fig. 5 on the following page. After removing the screws,
lift the body away from the chassis and lay the body next to the chassis.
Next, remove the truck blocks from the chassis by unscrewing the large
Phillips motor mount screw on the bottom of each truck block (See Fig. 5).
Once the motor mount screw has been removed, pull the motor away from
L
L
Figure 3: Lubricating The Chassis
GREASE
Figure 4: Greasing The Chassis Trucks

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MTH F-3 B-Unit Operating Manual
the truck block and lightly coat the motor worm gear and bronze drive gear
(in the truck block) with grease. Reassemble the truck and motor, being
careful not to pinch the pickup and ground wires between the truck block
and motor mount. Repeat the procedure for the other motor and truck and
then reassemble the chassis to the body. When reassembling the chassis and
body, be very careful that the lighting wire harnesses are not caught
between the body and chassis as this can lead to a short which may damage
the electronic circuit boards beyond repair.
In addition to the truck block internal gearing, it is a good idea to lubricate
the outside truck block “idler" and “drive" gears with grease. Use the
diagram shown in Fig. 4 above as a guide and add grease to the points
marked with a “G".
Periodically, check the locomotive wheels and pickups for dirt buildup as
this can significantly affect the engine’s ability to perform properly. Dirty
track and dirty wheels can cause both poor electrical contact as well as poor
traction, especially on elevated track sections. Finally, dirt and oil build up
can prematurely wear out the neoprene traction tires.
TRACTION TIRE REPLACEMENT
INSTRUCTIONS
Your locomotive is equipped with two neoprene rubber traction tires on
each power truck. While these tires are extremely durable and long-lasting
there may arise a time where they will need to be replaced. Should this
occur, you will need to remove the truck sides from the truck block from the
chassis in order to slip the new tire over the grooved drive wheel. The truck
Motor Mount Screw
Body Mount Screws
Body Mount Screws
Figure 5: Removing The body From The Cahssis

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MTH F-3 B-Unit Operating Manual
sides can be removed from the truck block by turning the engine upside
down and unscrewing the two phillips head screws.
Before the new tire can be installed, you must make sure the old tire has
been completely removed from the groove in the drive wheel. Use a razor
blade or small flatblade screwdriver pry away any remains left from the old
tire that may still be in the drive wheel groove. Once the old tire has been
completely removed, slip the new tire onto the wheel. You may find it
useful to use two small flatblade screwdrivers to assist you in stretching the
tire over the wheel. Be careful to avoid twisting the tire when stretching it
over the wheel. If a twist occurs, the tire will have to be removed and
reinstalled or a noticeable wobble in your engine will occur when operating
the locomotive. In addition, it is important to make sure that the tire is
fully seated inside the groove. Any portion of the tire extending out of the
groove can cause the engine to wobble. A razor blade can be used to trim
away any excess tire that doesn’t’t seat itself inside the groove properly.
Once the new tire(s) are in place, reassemble the truck sides to the truck
blocks and then reassemble the chassis to the body. Replacement tires are
available directly from MTH Electric Trains.
O-31 OPERATION
While the MTH F-3 B-Unit is more than capable of operating on O-31
curves and switches, you may find that certain light freight cars are prone to
derailing when being pulled or pushed by the MTH F-3 through O-31
switches. Should this occur, we suggest adding weight to the cars making
them heavier and less likely to derail.

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MTH F-3 B-Unit Operating Manual
TRANSFORMER WIRING CHART
ProtoSounds® is designed to work with any standard AC transformer that
uses a “Pure Sine-Wave" format. The chart below lists the many Lionel®
compatible transformers, such as the Lionel KW or ZW models. In
addition, the chart details how the terminals on these compatible
transformers should be attached to your layout. The Trainmaster system
from Lionel® (marked with an asterisk below) will not function correctly
with ProtoSounds without disrupting the sound effects. Therefore,
whenever ProtoSounds senses that the Trainmaster system is being used, it
automatically disables ProtoSound’s sound effects. The operator retains
control over the engine, but no sound effects will play.
*ProtoSounds needs over 14 volts of power to work properly. Overloading or using in-line
accessories with this transformer may lower the peak voltage below ProtoSound’s
requirements.
Transformer
Model Center Rail Outside Rail Min/Max. Voltage Power Rating Transformer Type
Lionel 1032 UA5-16v* 90-Watt Standard
Lionel 1032M UA5-16v* 90-Watt Standard
Lionel 1033 UA5-16v* 90-Watt Standard
Lionel 1043 UA5-16v* 90-Watt Standard
Lionel 1043M UA5-16v* 90-Watt Standard
Lionel 1044 UA5-16v* 90-Watt Standard
Lionel 1053 UA8-17v 60-Watt Standard
Lionel 1063 UA8-17v 60-Watt Standard
All-Trol Left Terminal Right Terminal 0-24v 300-Watt Electronic
Cab-1/Powerma
st er AU0-18v 135V.A. Electronic
Dallee Hostler Left Terminal Right Terminal
Lionel LW AU8-18v 75-Watt Standard
Lionel KW A or B U6-20v 190-Watt Standard
MRC Tech II Left Terminal 2ndFrom Left 0-15v* 40V.A. Electronic
Lionel MW (not
recommende d) Outside Track Terminal Inside Track Terminal 5-16v* 50V.A. Electronic
R.O.W. Red Terminal Black Terminal 0-24v 384-Watt Standard
Lionel RS-1 Red Terminal Black Terminal 0-18v 50V.A. Electronic
Lionel RW UA9-19v 110-Watt Standard
Lionel SW UAUnknown 130-Watt Standard
Lionel TW UA8-18v 175-Watt Standard
Lionel ZW A or D U8-20v 275-Watt Standard
MTH Z4000 Red Black 5-21v 390-Watt Electronic

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MTH F-3 B-Unit Operating Manual
Parts
Name and NumberPart#
1.)Shell ( AT & SF )FC-2100094
1.)Shell ( C& O #8506 )FC-2100095
1.)Shell ( B & M )FC-2100096
1.)Shell ( L & N #701 )FC-2100097
1.)Shell ( RI )FC-2100098
1.)Shell ( ARR #1503 )FC-2100099
2.)Vent(right)(AT&SF)(silver)FC-2110012
2.)Vent(right)(C&O)(blue)FC-2110013
2.)Vent(right)(B&M)(maroon)FC-2110014
2.)Vent(right)(L&N)(blue)FC-2110015
2.)Vent(right)(RI)(black)FC-2110016
2.)Vent(right)(ARR)(blue/yellow)FC-2110017
3.)Vent(left)(AT&SF)(silver)FC-2120012
3.)Vent(left)(C&O)(blue)FC-2120013
3.)Vent(left)(B&M)(maroon)FC-2120014
3.)Vent(left)(L&N)(blue)FC-2120015
3.)Vent(left)(RI)(black)FC-2120016
3.)Vent(left)(ARR)(blue/yellow)FC-2120017
4.)Vent(top)(AT&SF)(silver)FC-2100100
4.)Vent(top)(L&N)(blue)FC-2100101
4.)Vent(top)(ARR)(blue)FC-2100102
4.)Vent(top)FC-2100103
(RI,B&M,C&O)(black)
5.)DiaphramFI-0000017
6.)Handrail (18.5mm long)FC-2100104
7.)Handrail (31.5mm long)FC-2100105
8.)Lens (portal)(11.0mm)FA-0000001
9.)RubberbandBI-4500004
10.)Motor BE-0000022
11.)DCRU boardAC-0000001
12.)ScrewIA-0000055
13.)ScrewIA-0000094
14.)BracketIH-0000039
15.)ChassisDH-2100006
16.)Motor mountBI-0000009
17.)Spacer (2.0X4.5X14.5mm)ID-0000050
18.)PCB board (w/wire harness)BB-0000014
19.)ScrewIA-0000095
20.)ScrewIA-0000044
21.)Ladder (chassis)( silver )FC-2100106
21.)Ladder (chassis)( black )FC-2100107
22.)ScrewIA-0000037
23.)Ladder (truckside)(silver)FC-2100108
23.)Ladder (truckside)(black)FC-2100109
24.)Truckside (silver )DB-2100005
24.)Truckside (black )DB-2100006
25.)ScrewIA-0000003
26.)Wire strapIH-0000012
27.)Fuel tank (silver)FC-2100110
27.)Fuel tank (black)FC-2100111
28.)Switch (small)BB-0000009
29.)ScrewIA-0000076
30.)ScrewIA-0000001
31.)ScrewIA-0000012
32.)ScrewIA-0000041
33.)ScrewIA-0000015
34.)Insulator (top)(square)BD-0000015
35.)ScrewIA-0000016
36.)Traction tiresDE-0000018
37.)Truckblock(2axle)DA-2000002
Parts
Name and NumberPart#
38.)NutIC-0000005
39.)Insulator (bottom)(rect.)BD-0000039
40.)Pick-upBD-0000025
41.)E-clipIF-0000002
42.)WasherID-0000026
43.)SpringIE-0000007
44.)T-barIG-0000001
45.)Coupler (non-operating)DD-4000005
46.)Wire harnessBC-0000011
* Requires Exchange
Premier Powered B Unit

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MTH F-3 B-Unit Operating Manual