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Class 31

Operating and Maintenance Instructions

DCC Ready / DCC Fitted / Sound

A-I-A DIESEL ELECTRIC LOCOMOTIVE

Routine Maintenance

Track Cleaning – In normal use, model railway layouts 

will eventually accumulate a blackish deposit on the 

running surfaces of the rails, and some of this will be 

transferred onto the locomotive’s pick-up wheels.
The 12 volt DC supply is collected from the track 

through the wheels on one side of the locomotive and 

returned through the wheels on the other side. If the 

deposit is allowed to build up, it will have the following 

adverse effects:

The driving wheels will not be able to achieve

maximum traction

There will be a reduction in the power reaching the 

locomotive motor

It is therefore essential that the track, and wheels, are 

kept clean. This can be done by wiping the surfaces with 

a clean, non-fluffy cloth. More stubborn deposits can be 

removed by using the Hornby Track Cleaning Rubber, 

reference R8087, which can be obtained from Hornby 

Service Dealers.
Motor – The locomotive is fitted with a sealed, long-

life, 5-pole motor which requires no maintenance.

After a considerable amount of use the motor may

require replacement and this should be carried out by a 

Hornby Service Dealer.
Chassis – The locomotive chassis may, from time to 

time, pick up fluff, fabric fibres and pet hairs which can

become entangled in the gears and around axles. For 

this reason, it is not advisable to run the locomotive on 

track which is laid on a carpet. It is important to check 

regularly and remove any such debris with the aid of 

small tweezers.
Lubrication – Although the locomotive was lubricated 

during manufacture, the lubricant can sometimes dry 

out in storage. Lubrication should be carried out at

approximately 6-monthly intervals, or every 100 hours 

of running. Instructions for carrying out lubrication

procedures are given in section 1 on pages 2 and 3.
Locomotive Bodywork – The locomotive body is 

overall spray painted and the rest of the decoration is 

applied by a printed process, not transfers.

Spare Parts and Service

Spare parts packs can be obtained from Hornby Service Dealers who are also able to offer a repair service.

Waste electrical products should not 
be disposed of with household waste. 
Please recycle where facilities exist. 
Check with your Local Authority or 
retailer for advice

General

Please read right through these instructions,

particularly the Safety Notes on page 4.
Hornby locomotives are precision built and, if treated 

with care, will give many years of good service.

Care should be taken to avoid damage when handling 

the model.
This locomotive should not be operated on track

curves of less than 438mm radius, which is Hornby

2nd radius track.
The five-pole electric motor of the locomotive is

designed to be operated from a variable 12 volts,

DC power supply only. This should be obtained by using 

a suitable Power Controller operated from the normal 

domestic mains electricity supply. 
NEVER CONNECT A LOCOMOTIVE DIRECTLY

TO THE MAINS ELECTRICITY SUPPLY.
The locomotive will normally draw a current of between 

·2 and ·4 amp depending upon the track configuration

and whether or not gradients are included. There will

be a current surge on starting the locomotive.

Running Hints

If a locomotive ceases to respond normally to the power 

DCC Ready

Contact your specialist dealer for advice.

controller, or runs badly, check that the following are in 

order:
• All electrical connections are correctly made and the 

wall power socket is switched ‘ON’.

• The power connecting clip is correctly inserted into a 

suitable section of track.

• All track sections are correctly fitted together and

all fishplates (rail-joiners) are fitting tightly onto

adjoining metal rails.

• All locomotive wheels are correctly positioned on the 

track rails.

• The direction control switch on the train controller is 

set to operate in one direction or the other, and not 

in the central ‘OFF’ position.

Television Suppression

Your Hornby locomotive incorporates radio and television interference suppressors. Should interference be

experienced despite these precautions, it may be due to close proximity of the model railway layout to receivers, 

aerials, or their ‘downlines’. In this case, move the layout further away from aerials and receivers.
It is most important that track and wheels be kept absolutely clean. 

Hornby Hobbies Limited  Margate  Kent  CT9 4JX  UK    Tel: +44 (0)1843 233525    www.hornby.com

Printed in China

A Hornby product

4/1161B

Safety Notes

•This locomotive is not suitable for children under
14 years of age. Handle with care.

•This locomotive is intended for indoor use only.

•The transformer is not a toy. It is a ‘Transformer 
for Toys’. Before use, check that the transformer is 
the correct voltage for your mains electricity supply. 
This locomotive is only to be used with the 
recommended transformer. The transformer should 
be examined regularly for damage to the casing, plug 
pins and cables. 
In the event of such damage, the set should not 
be used until the transformer is replaced with 
a new Hornby recommended unit. Never 
attempt to open the transformer yourself.

•This locomotive must not be connected to more 
than the recommended number of power supplies. 
The out-put terminals of the transformer must not 
be connected directly, or indirectly, to the output of 
any other AC circuit derived from a transformer or 
mains power supply.

•Before cleaning any part, disconnect the 
transformer from the mains electricity supply.

Do not use liquid for cleaning.

•Please retain these details and address for future 
reference.

IMPORTANT

•  The protective 2-part EPS pack is designed to prevent damage during product 

removal. Remove the bands found at either end of the pack. Lift off the upper 

half of the pack, exposing the locomotive for easy access.

•  This locomotive is made to exacting fine scale standards and therefore 

necessarily incorporates small, delicate, protruding parts – handle with care.

•  Before using the model, read through the Operating and Maintenance 

Instructions in this leaflet.

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