roundhouse Little John User guide

Owners Handbook
For the Little John Diesel Locomotive
Little John

Operating Instructions
IMPORTANT: Please read these instructions carefully before
operating the locomotive
SAFETY PRECAUTIONS
This is a working battery diesel model locomotive. Provided it is
operated with reasonable care and attention, no problems should
arise. The motor used in this locomotive is very powerful and you
should avoid touching the moving parts when in motion. As you will
appreciate, this is not a toy and is therefore unsuitable for
unsupervised children.
ACCESORIES INCLUDED.
Radio Transmitter.
Charger for locomotive.
Back to Back gauge and Allen key.
Small pot of silicone grease for lubricating worm drive.
ALTERING WHEEL GAUGE
Ensure the locomotive is switched off.
Turn the model upside down to gain access to the wheels. The
driving wheels are moveable on their axles and are locked in place
by 2 small grub screws. Manually moving the steel motor worm
drive with your index finger will turn the wheels and bring the grub
screws into a position where they can be loosened using the Allen
key provided. Note that there are 2 grub screws on each wheel.
The wheels should be adjusted so that the ‘back to back’ gauge
supplied will just slip between their inner faces. Ensure that the
wheels are evenly spaced relative to each side frame and gently
nip-up the grub screws.
Do not over tighten the grub screws.

Wheel
Grub
Screws
R/C
Receiver
Worm
Drive

Initial Charging.
The NiMh batteries fitted in the locomotive will require charging
before operating the model.
First, connect the mains lead to the charger. It is important that the
mains lead is plugged into the charger before connecting to the
mains supply, otherwise damage to the charger may result.
Note: the charger is for indoor use only.
Do not leave the model or charger unattended whilst charging
and unplug from mains power once charging is completed.
The charger should be kept in an horizontal position.
Do not cover the charger, as it will overheat.
Do not allow the charger to become wet.
Keep away from any flammable sources.
Do not disassemble the charger - mains voltage inside.
It will initially take approximately 5 hours for the batteries to fully
charge. The time taken for subsequent full charges may be less.
When the batteries are fully charged, the LED will change to green.
The charging jack should now be removed from the locomotive and
the charger unplugged from the mains.

On / Off
Switch
Charging
Socket
Operating the locomotive.
Lift up the cover on the top of the transmitter to gain access to the
ON / OFF switch.
Do not adjust any of the other switches or controls that are there.
Turn on the transmitter. Always turn on the transmitter before the
locomotive to ensure correct operation.

The locomotive can now be turned on using the switch located in
the cab on the left-hand side.
Operating the locomotive.
Fit Four AA alkaline batteries into the bottom of the Transmitter
Handset. Lift up the ‘Flip Cover’ at the top, rear of the transmitter.
Turn on the Transmitter by moving the ON / OFF toggle switch to
the Left. Do not adjust any of the other switches or controls on the
Transmitter. Always turn on the transmitter before the locomotive to
ensure correct operation.
On / Off
Toggle Switch
Running the locomotive.
With the transmitter and the locomotive both switched on, use the
hand wheel on the transmitter to move the locomotive in either
forward or reverse direction. When the hand wheel is released, it
will spring back to mid gear position and the locomotive will stop.

Maintenance.
Very little routine maintenance is required. However, external
moving parts such as the coupling rods, axles and outside cranks
will require periodic lubrication with a light machine oil such as a 20
-50 motor oil.
The worm drive will require occasional lubrication with silicone
grease. Make sure that the locomotive is switched off - do not try to
lubricate the worm drive whilst the motor is turning.
Apply sparingly, using the blade of a small screwdriver, directly to
the worm drive. Don't allow a build up of grease as this will harbour
grit which in time may lead to excessive wear of the worm drive.
If continual running is desired, the following modification should be
made.
1. Remove the screw from the centre of the hand wheel and
take off the wheel.
2. Place the 2 rubber ‘O’ rings supplied onto the wheel shaft.
3. Refit the hand wheel and replace the screw.
This will introduce friction between the hand wheel and transmitter
body, causing the wheel to remain in its set position.
Rotate Wheel Clockwise for
Forward and Anticlockwise for
Reverse direction of travel.
Remove this
screw to take off
the hand wheel.

If your dealer is unable to help, please contact the Factory directly:
ROUNDHOUSE ENGINEERING CO. LTD.
Units 6-10 Churchill Business Park. Churchill Road.
Wheatley. Doncaster. DN1 2TF. England
Telephone [phone] Fax [phone]
email [e-mail]
SERVICE AND PARTS
If' any problems arise with this model which are not covered in
these operating instructions, or spare parts are required, owners
should first contact their local dealer. Your ROUNDHOUSE dealer is;
www.roundhouse-eng.com
ONLINE