USA Trains SD70 MAC Diesel Locomotive User manual

This USA Trains locomotive is warranted for one year from the date of
purchase against defects in material or workmanship. We will repair or
replace (at our option) the defective part without charge for parts or labor
within one year of the original date of purchase provided the warranty
registration card has been received by USA Trains. This warranty does not
cover items that have been abused or damaged by careless handling or
improper operation such as a train derailment, modification or repair by
non-factory technicians. Parts that “wear out” due to excessive use are
also not covered under warranty. USA Trains reserves the right to deter-
mine “excessive use”. Transportation costs incurred by the customer are
not covered under this warranty.
This Diesel locomotive is built with pride by USA Trains and is covered by
a limited warranty. (See limited warranty terms). Please follow these
instructions carefully before sending your locomotive for service:
1. Return locomotive in its original blue/red box with the proper foam
inserts and then pack the original box in a proper shipping carton so it is
well protected in shipment. The package must be fully insured and pre-
paid. USA Trains is not responsible for damage or loss during shipment.
2. Include a note explaining the problem and servicing you need per-
formed. Be sure to include your name, street address, (NO P.O. BOXES
PLEASE) City, State, Country (if outside U.S.A) and zip code along with a
daytime phone number including area code. If the locomotive service is
not covered by warranty, a reasonable service fee will be charged. For any
locomotives to be returned outside the continental U.S.A., please include
$25.00 U.S. currency to cover return postage. Any locomotives returned in
the continental U.S.A. will be reshipped to you pre-paid by USA Trains.
3. Ship your item to: USA TRAINS, 662 CROSS STREET, MALDEN, MA. 02148
SERVICI G
OPTIO AL COUPLER BOX ASSEMBLY
LIMITED O E YEAR WARRA TY
OTE: For operation on 8 foot diameter curved track, the optional coupler
box must be used. If snow plow is used, some trimming of the sides around
the coupler pocket is necessary.
(1) Remove 4 screws that hold coupler support bracket and
coupler centering spring. Hook and loop coupler assembly
should slide off. Loosen the front two screws holding metal
truck guide so you can remove coupler centering spring.
Re-tighten two screws holding the metal truck guide.
(2) Mount coupler support bracket provided with coupler
box assembly to frame using same screws used for the
hook & loop bracket.
(3) Mount coupler box top plate to coupler support
bracket provided (1 screw)
(4) Clip rear of knuckle coupler arm off (D page 5)
(5) Mount coupler arm onto slide spring then insert slide
spring onto plate making sure coupler is right side up.
(thick black coupler release should be facing you)
(6) Attach bottom coupler plate using the two long
screws provided.
3
2
5
2
SD70 MAC
DIESEL LOCOMOTIVE
OW ERS MA UAL
1
PAGE 8 PAGE 1
USA TRAI S
662 Cross Street
Malden, MA 02148, USA
www.usatrains.com
8

Dear Customer,
Congratulations on your purchase of this highly
detailed replica of the electro-motive (EMD) SD70 MAC.
The engineering and design staff at USA Trains has
spent many hours reviewing original blueprints and
developing a locomotive that looks authentic and
will provide you with many hours of operating
enjoyment all at a reasonable price. Over 400 parts make up this model -
the level of detail found in brass locomotives costing thousands of dollars
for a fraction of the cost. This locomotive will enhance the appearance of
any modelers railroad.
Please read the following instructions which will help you understand
and operate the numerous features of this locomotive.
Happy Railroading
USA TRAI S
The EMD SD70 MAC changed the railroad industry the same way the
Boeing 707 changed the commercial airline industry. It was a dramatically
improved product that provided the railroad industry much greater
economy and efficiency.
In 1993, the General Motors Electro-Motive Division (EMD) introduced a
radical design change, the SD70 MAC. These new alternating-current
(AC) locomotives offered radically improved performance - five of these
new locomotives can replace nine of the old ones. The increased
efficiency convinced Burlington Northern to place the largest locomotive
order in history for 350 units. Within the first few months of the SD70 MAC’s
operation, the order was increased to 434 units. BN found it could haul
coal trains out of Wyoming’s Powder River Basin with just three SD70 Macs
instead of 5 SD40-2’s. The Southern Pacific and Union Pacific began
buying them also. A new era was born.
The accurate reproduction of this locomotive by USA Trains will allow
the modeler to have their favorite railroad SD70 MAC running among the
other locomotives on his/her railroad.
HISTORY OF THE EMD SD70 MAC
FEATURES
• Powerful dual-motored 12 wheel Power Trac drive train
• Operating fan driven smoke unit emits realistic diesel exhaust
• Alternating ditch lights at slow speed
• Front & rear directional headlights
• Constant voltage lighting
• Metal handrails
• Interior cab lighting
• Opening cab doors
• Detailed cab interior with engineer and illuminated control panel with
computer screen
• Authentic detailing including diamond plate walkways, grating on
steps, window shades, sliding windows and MU connectors
• Expert decoration reproducing authentic paint schemes of your favorite
railroad
PAGE 2 PAGE 7
2 7
ITEM No. PART No. DESCRIPTION
31 R22-631 Side Rails (2) (Specify Color)
32 R22-632 Body Rails (Front) (2) (Specify Color)
33 R22-633 Front/Rear Handrails (2) (Specify Color)
34 R22-634 Coupler Lift Bar w/4 Holders (1)
35 R22-635 Bell
36 R22-636 Truck Mounting Block (1)
37 R22-637 Coupler Mounting Block & Pivot (1)
38 R22-638 Air Hoses (1 Right And 1 Left)
39 R22-639 Single Air Hose
40 R22-640 Windshield Wipers (6)
41 R22-641 Light Bulb And Wire (Cab)
42 R22-642 Side Lift Rings (4)
43 R22-643 Left & Right Mirror
44 R22-644 Slide Shoes & Springs (4)
45 R22-64 5 Lower Gear Box Cover
46 R22-646 Circuit Board w/Bulb & Wire
47 R22-647 Idler Gear w/Bushing (Set of 3) & Worm Gearw/Bushing (1)
48 R22-648 Shock Absorber (1)
49 R22-649 Main Circuit Board w/Switch Panel
50 R22-650 Fan w/Rotation Blade (Assembled) (Specify Color)
51 R22-651 Rear Door Hinge (1 Top/1 Bottom)
52 R22-652 Door Handle (1)
53 R22-653 Front Door Hinges (6)
54 R22-654 Front Headlight Bulb
55 R22-655 Universal oints
56 R22-656 Brake Wheel (Specify Color)
57 R2021 Snow Plow (1)
R50001 Usa Trains Smoke Fluid
R50002 Usa Trains Conductive Lubricant
1 4 542
30
49 29 27 36 25 26 45 37
34
33
10,19
38, 39

Due to the high level of detail designed into the USA Trains SD70 MAC,
some simple assembly is required.
(1) Coupler Lift Bar Assembly (2)
Insert 2 eye bolts onto each side of lift bar and insert all 4 eyebolts
onto frame as in diagram below. (both ends)
(2) Air Hoses (6)
Insert right and left air hoses (3) into frame and single air hose to right
of coupler. (both ends)
(3) Hand Rails - Sides and Ends (4)
Insert side and end handrails into frame as shown in diagram below.
(4) Optional Snow Plow (1)
A snow plow is provided for the front pilot of this locomotive. For
coupler operation do not use “knock out portion” of plow to allow the
coupler arm to swing freely on curves. Insert snow plow into 4 holes on the
front pilot of the locomotive.
OTE: For layouts with inclined track some trimming of the snow plow
bottom may be necessary to avoid the plow hitting the track rail.
ASSEMBLY
1
3
PAGE 6 PAGE 3
6 3
ITEM No. PART No. DESCRIPTION
1 R22-601 Diesel Horn (Silver)
2 R22-602 Sinclair Antenna (Specify Color)
3 R22-603 Brass Lift Rings (13)
4 R22-604 Roof Fan With Rotating Blade (Specify Color)
5 R22-605 Sand Filler Hatch (Specify Color)
6 R22-606 Smoke Stack Cover (Silver)
7 R22-607 Sunshade (Specify Color) (1)
8 R22-608 Smoke Unit (Fan Driven)
9 R22-609 Smoke Generator Circuit Board (1)
10 R22-610 Bulb And Wire For Headlight (For Front Or Rear)
11 R22-611 Number Board (Specify Number)
12 R22-612 Number Board Bulb
13 R22-613 Ditch Light Lens Cover
14 R22-614 Ditch Light Pcb Board
15 R22-615 Ditch Light Base (Right/Left) (2)
16 R22-616 Ditch Light Bulb
17 R22-617 Headlight Lens (Front - Upper)
18 R22-618 Headlight Lens (Front - Lower)
19 R22-619 Headlight Lens (Rear)
20 R22-620 End Steps (8) - One End (Specify Color)
21 R22-621 Truck Side Frame Springs (8)
22 R22-622 Metal Wheels W/ Gear For End Gear Box (2)
23 R22-623 Metal Wheels W/ Gear For Center Axle (2)
24 R22-624 Metal Wheels W/Gear For Inner Axle (2)
25 R22-625 Replacement Motor Truck (1)
26 R22-626 Replacement Motor Only
27 R22-627 Truck Side Frames (2) (Specify Color)
29 R22-629 Air Cylinders (2) (Specify Color)
30 R22-630 Fuel Tank (Specify Color)
63 502 51, 5241437
17, 54
40
10,18,53
13,14
15,16
11,12 8, 9
32 20 22 23
47 44 24 21 35 3157
3
Please call our parts
department for prices
and availability or
visit our web site
www.usatrains.com
Phone: [phone]
Fax: [phone]

PAGE 4 PAGE 5
4 5
1. SIDEFRAME JOUR AL BOX: The axle ends fit into brass bushings which
bring power into the locomotive. These brass bushings should periodically
be cleaned out and lubricated with a small amount of USA Trains electrically
conductive lubricant (USA Trains Part #R50002). Use only our conductive
lubricant to avoid loss of electrical contact which could cause your locomotive
to lose power or run erratically. The frequency of lubrication depends on
your operating conditions.
2. AXLE LUBRICATIO : Two drops of oil should be placed on all six contact
points where the axle enters the gear box. An ultra light oil such as Hob-E-
Lube (#HL653) is recommended.
3. GEAR BOX LUBRICATIO : Under normal operating conditions, the gear
box should not have to be lubricated. However, you may want to lubricate
the gears after each 100 hours of operation by removing the six screws on
the bottom of the main gear box to expose the gears and applying moly
grease by Hob-E-Lube to the gears on the axle only. Replace main gear
box. Remove 4 screws from end gear box cover and lube. Replace end
gear box cover. Do not apply grease to any electrical contacts inside the
gear box as you may hinder the electrical contacts required for smooth
operation.
WHEEL/SLIDE SHOES
The SD70 MAC units are equipped with twelve electrical pickup points-
six per motor truck. Each of these must be cleaned periodically to ensure
proper electrical contact with the track which will ensure smooth opera-
tion of your locomotive. Clean all six wheels and the bottom surface of the
slide shoes periodically to ensure good electrical contact with the track. A
good indication that you need to clean these contacts is flickering lights,
non-operation of the smoke unit, or a jerking motion of the locomotive.
2MAI
GEAR BOX
E D
GEAR
BOX
2
1
2
2
1
1
1
2
2
K UCKLE COUPLER I STALLATIO
•
•
•
Remove Hook & Loop coupler.
Clip tab "A" from end of tongue
and file smooth.
Attach USA knuckle coupler "B"
with #4 screw (C) provided.
See page 8 for optional coupler
box assembly for operation on 8 foot diameter curve track.
A
B
C
D
LUBRICATIO
POWER REQUIREME TS
The locomotive is designed to operate on direct current (DC) with
output of 0-22 volts.
CO TROL SWITCHES
The locomotive contains four switches to operate the on/off motors,
on/off smoke generator, on/off lights and on/off sound. The control switches
are located on the underside of the locomotive, between the front motor
truck and the fuel tank. (see diagram below)
OPERATIO
MOTOR LIGHTS SMOKE SOUND
ON
OFF
LUBRICATIO
Your locomotive was lubricated at the factory and under normal oper-
ating conditions will not need to be lubricated during the first 50 hours of
operation. The locomotive has three lubrication points.
(See diagram next page)
MAI TAI I G A D SERVICI G YOUR SD70 MAC
CAUTIO ! If the locomotive is going to be run for any period of time without
smoke fluid, please position the smoke switch to the OFF position.
SMOKE GE ERATOR
The locomotive contains a fan driven smoke unit which produces
“diesel exhaust” through the stack on the topside of the cab body. The
smoke generator requires the periodic addition of smoke fluid in order to
operate properly. Add 25-30 drops of USA Trains smoke fluid (USA Trains
part # R50001) into the smoke generator hole. Never overfill the smoke
generator and promptly wipe up any excess smoke fluid that may have
spilled onto any painted surfaces. Begin operation. Smoke production will
begin when the fluid becomes heated and should last approximately 20
minutes. It may take longer to generate the smoke if the unit is full. When
the smoke chamber is empty the unit will shutdown automatically until
more fluid is added. By following these directions the smoke generator will
provide hours of enjoyment and enhance the realistic operation of your
SD70 MAC locomotive.
CAUTIO ! Even though your locomotive is equipped with an automatic
shut-off when the smoke generator runs out of fluid, we suggest you shut off
the smoke switch on the underside of the locomotive to prevent accidental
burning out of the smoke generator.