Roundhouse Mildred Guide de l'utilisateur

Owners Handbook

For the Mildred Locomotive

Mildred

Operating Instructions

IMPORTANT: Read these instructions carefully before operating

the locomotive.

The following items are required for running this engine and are not

included with the model.

Fuel Butane gas. See 'Filling the gas tank'

Water See 'Filling the boiler'

Lubricating oilSee 'Lubrication'

SAFETY PRECAUTIONS

This is a working model locomotive using steam under pressure

and highly flammable fuel. Provided it is operated with reasonable

care and attention, no problems should arise.

It is intended for use out of doors and must only be operated in a

well-ventilated area.

Whilst the locomotive is in use, hot gasses are exhausted up the

chimney and excess steam frequently blows off through the safety

valve even when stationary, so operator and spectators should not

bend over the model.

As you will appreciate, this is not a toy and is therefore unsuitable

for young unsupervised children.

Follow manufacturer’s recommendations regarding the safe

storage of Butane gas canisters.

Some areas of the model will get quite hot whilst it is operating, so

a pair of gloves is provided in the tool kit for your protection.

Always have to hand either a fire extinguisher or wet cloth when

operating the model.

CONTENTS

Tool kit. Page 4

Running in. Page 4

Access to controls. Page 4

Identification of parts of the locomotive. Page 5

Preparations for operation.

1. Filling the Gas Tank. Page 6

2. Filling the Boiler. Page 7

3. Lubrication. Page 7

4. Lighting the Burner. Page 8

Running the locomotive. Page 9

Driving manually. Page 10

Driving by radio control. Page 11

Storage between operating sessions. Page12

Altering wheel gauge. Page13

Trouble shooting & maintenance.

Steam Leaks. Page 13

Regulator. Page 14

Radio Control. Page 15

Gas System. Page 15

Boiler and Gas Tank Certificate, Pages 17 & 18

(EC Declaration Of Conformity).

Service and Parts. Page 20

Mildred Instruction Booklet

TOOL KIT

The following items are included with your locomotive.

One 60ml bottle of special steam oil for use in the lubricator.

One 60ml syringe with plastic tube for filling the boiler with water.

One set of spare washers and ‘0’ rings.

One spare gas jet.

One Allen key for cylinder socket cap screws.

One wheel setting (back to back) gauge and key.

One pair of protective gloves.

One cleaning duster.

One wheel setting (back to back) gauge and key.

RUNNING IN

All locomotives are extensively test run before leaving the factory,

but they will still require a certain amount of running in when new,

to overcome initial tightness and allow valves etc. to ‘bed in’.

ACCESS TO THE CONTROLS

For normal operation, all controls are accessible without the need

to remove any part of the locomotive, however, to give access to

the gas tank when filling, the cab roof hinges up from the side.

Care should be taken when opening the cab roof. Gently grasp

either side of the roof hinge and firstly lift the hinge vertically

upwards. This will lift the hinge clear of the cab, and allow the roof

to then tilt to the side. The gas regulator is accessible through the

rear of the cab, and on manual control engines, the steam regulator

is accessible through the right hand cab doorway and reversing

lever through the left hand cab doorway.

The radio control receiver and switch are housed on the right hand

side of the chassis, just below the cab floor.

The batteries for the radio control system are housed in a holder

beneath the cab roof. Refer to the manufacturers instructions

supplied with the radio control,

IDENTIFICATION OF PARTS OF THE LOCOMOTIVE

Radio controlled version illustrated

1 ) Lubricator drain screw. 2 ) Lubricator filler cap.

3 ) Reversing servo (this is replaced by a

reversing lever on manual models).

4 ) Pressure gauge. 5 ) Safety valve. 6 ) Gas regulator.

7 ) Gas filler valve. 8 ) Steam regulator.

9 ) Steam regulator servo and linkage (not fitted

on manual control engines). 10 ) Gas burner.

PREPARING FOR OPERATION

The locomotive must be serviced before being operated. It is

important to perform all the following operations.

1) FILLING THE GAS TANK

The filling of the gas tank should only be carried out in a well-

ventilated area, where there are no naked lights or other lighted

locomotives close by. Ordinary Butane or Iso-butane gas (as used

in gas cigarette lighters) is the preferred fuel, though for economy,

the larger canisters as used for blowlamps or camping stoves etc.

are better.

The larger canisters have an EN417 threaded self sealing valve on

top and require a special adapter to couple up to the filler valve on

the locomotive. A special brass gas filler adapter is obtainable from

your local garden railway supplier or direct from ROUNDHOUSE.

Mixed gasses are also available and may be used if ordinary

butane or iso-butane are not available, but see ‘Gas System’

section for more information on this subject.

Before attempting to fill the gas tank, make sure that the gas

control valve is closed by turning it clockwise.

The filler valve for the gas tank is on top of the tank under the cab

roof. Invert the gas canister and place its nozzle over the gas filler

valve. Support the tank from underneath and press the canister

down.

The gas will be heard hissing as it enters the tank and a small

amount will escape around the valve. This is quite normal and is

the tank venting as the liquid enters.

After about 20 to 30 seconds, liquid gas will emerge from the valve

showing that the tank is full. Remove the canister immediately.

2) FILLING THE BOILER

A syringe and plastic pipe are supplied for filling of the boiler.

The boiler is filled with water through the safety valve bush, housed

inside the brass dome on top of the boiler. The brass dome is a

substantial and heavy item, being turned from solid brass. Care is

needed when removing the dome, especially when the engine is

hot, as the dome itself will be hot. Take care not to drop the dome

onto the locomotive, as the weight of it may damage the model. Lift

off the brass dome then remove the safety valve by unscrewing the

large knurled plug into which it is fitted.

Using the 60ml syringe and plastic tube supplied, fill the boiler fully

to the top with clean water. Distilled water is recommended if

available. As an alternative in soft water areas, clean tap water can

be used. Also, rain water or water from a dehumidifier may be used

provided that it is adequately filtered. Many people use rain water

passed through a wine or coffee filter to remove any particles or

debris.

Do not use deionised water as this type of water in the long term,

may cause damage to the boiler and fittings.

There has to be a space above the water to allow steam to be

raised so, insert the end of the plastic pipe into the boiler and

withdraw 30ml of water with the syringe. Replace the safety valve

finger tight.

3) LUBRICATION

Regular lubrication of all working parts is important and should be

carried out before each operating session. There are two types of

lubrication required: The external moving linkages and bearings are

lubricated with a medium oil such as motor engine oil, and the

internal steam mechanisms such as cylinders, pistons and valves

are lubricated with a special steam oil that is mixed with the steam.

Infrequent external lubrication will allow parts to run dry, and over

oiling can form pools around operating parts that attract dirt and

grit. If too thin an oil is used it will evaporate very quickly as the

loco gets hot –leading to dry running. We recommend the use of a

20-50 motor oil for external lubrication.

Internal lubrication is achieved by steam oil that is mixed with the

steam in the displacement lubricator, housed in the left-hand side

of the cab. Remove the knurled cap from the top and slacken the

drain screw two or three turns at the bottom but do not remove it.

Any water in the lubricator will run out through the drain screw.

Tighten the drain screw and refill with the steam oil supplied, then

replace the cap.

Take time filling the lubricator, especially when cold, as the oil

takes time to run down and may trap an air bubble. Both cap and

drain screw are fitted with ‘0’ rings and need only be closed finger

tight.

NOTE: Only special steam oil as supplied should be used in the

lubricator and under no circumstances should ordinary oil be

substituted, or damage may result. The gas and steam regulators

will require periodic lubrication –see the troubleshooting section for

details.

4) LIGHTING THE BURNER

WARNING: Before lighting read the ‘Gas System’ section further

on ion this booklet, and be aware of potential problems. If the gas

system is not operating correctly, shut it off immediately or

damage may result.Move the locomotive to another location before

lighting. Butane is heavier than air and small pockets of gas can

collect around the locomotive during filling.

To light the burner, hold a lighted match or cigarette lighter over the

top of the chimney and slowly open the gas regulator by turning it

anti-clockwise. The gas should ignite almost immediately with a

pop as the flame travels down the chimney and into the boiler tube.

The burner should be audible but not too loud.

NOTE as stated above, the gas regulator should be opened slowly

until the burner ignites. If opened too quickly, particularly when the

engine is cold or if the gas tank has just been filled, it is possible

that the flame may not travel back into the boiler flue but stay in the

smokebox. If this should happen, the burner will sound quite

different to normal and the blue flame will be visible in the

smokebox if viewed down the chimney from a safe height. Should

this happen, turn off the gas immediately or damage may result

and then re-light it.

If the problem persists and it is not possible to ignite the burner

correctly, then a dirty jet should be suspected and cleaned as in the

Gas System Troubleshooting Section.

For the first couple of minutes keep the burner on low. This is

important, as until it warms up, the flame will be a little unstable

and turning it up too much could cause it to go out. Also, with a

completely full tank, liquid gas could be drawn off instead of

vaporized gas, which can also extinguish the flame.

After a couple of minutes, the gas control valve can be opened

more to speed up steam raising. Open the gas regulator slowly to

about one full turn.

The full range of adjustment (closed to fully open) is achieved

within the first full rotation of the gas regulator knob any more is

unnecessary.

RUNNING THE LOCOMOTIVE

When full working pressure has been reached (about 40psi), the

safety valve will start to blow off steam. Steam generation can be

controlled by the gas valve in the cab. If the safety valve blows off

frequently during running, then too much steam is being produced,

which wastes water and gas. Turning down the burner will

decrease the amount of steam created. Conversely, if steam

pressure is not maintained during a run, then the burner should be

turned up.

After a few minutes of running it may be noticed that the gas

pressure through the burner has increased. This is due to the gas

tank becoming warmer and so increasing the gas pressure. Simply

turn the gas down –this may need to be performed several times

during a run. The art of balancing steam generation to the

operational requirement by the adjustment of the gas control valve

will quickly be learned.

The gas tank has a duration of about 25 minutes, though this will

vary a little depending on gas valve setting. The boiler should not

be allowed to run dry, and the gas tank capacity is such that the

gas should run out before the water. When the gas is fully used up,

the steam pressure in the boiler will be seen to gradually drop until

the loco comes to a halt. Should the water expire before the gas is

fully used, the pressure will drop rapidly and the loco will stop.

Check the pressure gauge –if this is zero turn off the gas. No

damage will result if the gas is turned off immediately.

DRIVING THE LOCOMOTIVE MANUALLY

On manually controlled locomotives, there are three main controls,

all of which are housed in the cab.

1) The gas regulator, which should be used to control steam

generation as described earlier.

2) The reversing lever. This is in the left-hand side of the cab and is

moved fully forward for running in a forward direction and full back

to run in the reverse direction. It should be parked in the centre

(mid gear) when the locomotive is stationary for any length of time.

When in mid gear position, the valve gear is effectively in neutral

and the engine will not move under steam power.

3) The regulator. This is the main steam control valve and

regulates the speed of the locomotive. The regulator handle is

situated in the right hand cab doorway and is moved anti-clockwise

to open and clockwise to close.

Using the reversing lever, select the desired direction of travel and

open the regulator a little. Initially, there will be a certain amount of

water in the pipes and cylinders, which will exhaust through the

chimney and, after a few moments, the engine will move jerkily,

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