Operator's manual [PDF] (24 pages)
- Updated: 18.06.2026
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RS-27 Diesel
Engine
OPERATOR’S MANUAL
Compatibility
This engine will operate on any traditional
O-31 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 21 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 the risk of electric shock.
WARNING: When using electrical products, basic safety precautions should be observed, 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 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
properly repaired.
Do not operate your layout unattended. Obstructed accessories or stalled trains may overheat, resulting in damage to your layout.
This train set is intended for indoor use. Do not use if water is present. Serious injury or fatality may result.
G
G
G
G
Do not operate the hobby transformer with damaged cord, plug, switches, buttons or case.
Table of Contents
Set Up Checklist................................................................................................... 3
Lubrication.............................................................................................3
Priming The Smoke Unit....................................................................... 3
Checking The Battery............................................................................ 3
Basic Operation....................................................................................................4
Activating Features................................................................................4
Proto-Sound 2.0 Operating Instructions............................................................6
Activating Proto-Sound 2.0 Conventional Mode Features....................6
Freight Yard Sounds (FYS)................................................................... 7
Proto-Coupler® Operation.................................................................... 8
Speed Control........................................................................................ 9
Locking Locomotive Into A Direction.................................................. 10
Reset To Factory Default.......................................................................10
Automatic Sound Effects....................................................................... 10
Maintenance .........................................................................................................11
Lubricating and Greasing Instructions...................................................11
Cleaning The Wheels, Tires and Track..................................................12
Traction Tire Replacement Instructions.................................................13
Headlight Replacement Instructions......................................................14
Self Charging Battery Back-Up.............................................................14
Troubleshooting Proto-Sound® 2.0 Problems.......................................16
Transformer Compatibility and Wiring Chart........................................19
Additional Features Accessible with the DCS Remote Control System........20
Service & Warranty Information........................................................... 21
Limited One-Year Warranty..................................................................21
Authorized Service Centers....................................................................22
RailKing RS-27 Diesel Engine
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)
Lubricate Wheel Axles (L)
Figure 1. Lubrication Points on the Locomotive
DO NOT
OVER OIL
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 14.
4
RailKing RS-27 Diesel Engine
Basic Operation
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.
Cycle Phases
Neutral
Neutral
Forward
Reverse
Activating Features
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