Accucraft NG16 GARRATT Bedienungsanleitung

ACCUCRAFT UK LTD

Pinewood Cottage, Brockhurst

Church Stretton, Shropshire

SY6 6QY

Tel: 01694 723799

www.accucraft.uk.com

OPERATING INSTRUCTIONS

“NG16 GARRATT”

SAFETY FIRST

All our locomotives are safe to run, and will give many hours of

pleasure, providing the following safety procedures are followed: -

1. Please read the instructions thoroughly before running for the

first time.

2. Always do a complete refill of gas, oil and water. Never refill

just the gas to prolong the run.

3. Never let the engine run out of water.

4. When refilling the gas, do not have any naked flame present,

and NO SMOKING!

5. Do not pick up the engine by the bodywork, chimney or boiler,

especially when hot.

6. Only pick up the engine by lifting from under the middle of

the central cradle and, when hot, use old gloves or a cloth.

7. Do not stand over the chimney. Ejected boiling water or steam

may cause serious injury.

8. Do not open the smoke box door while the engine is alight.

General Hints

As with all operating machinery, whether model or full size,

wear will occur. In the model steam locomotive much can be

done to help prolong its life and decrease the amount of time

required in the workshop for servicing.

Keep the engine as clean as possible, and the motion free from

dirt and garden debris. The valve gear, axles and crank pins

should be oiled sparingly with light oil, e.g. “3-in -1 Oil”.

Over-oiling attracts dirt and grit, which will increase wear.

Regularly check that all screws and motion bolts are firm. Do

not over-tighten, as this strips threads and shears bolts. When

filling the lubricator, always use a high temperature steam

oil; this is available from other retailers. FAILURE TO

USE THE CORRECT GRADE OF OIL CAN LEAD TO

BLOCKED STEAM PIPES, AND WILL INVALIDATE

THE GUARANTEE.

NEVER USE BOILING WATER IN THE GAS TANK

WATER BATH, only „hand hot‟ water.

When running your engine avoid excessive speed and

acceleration, both will cause premature wear in the valve gear.

Prototypically, narrow gauge locomotives ran at a speed of

between 15 and 20 M.P.H., and never exceeded 25 M.P.H.

Positions of Fillers and Drains etc.

The cab roof lifts up and hinges over to the right hand side of

the locomotive to give access to the interior of the cab.

The gas inlet valve is on its own filling turret on the gas tank,

which is situated in the water bath in the rear bunker. To

access the filler lift up the bunker cover plate. The gas control

valve is also situated in the bunker.

The lubricator is in the left hand side to the front of the cab,

just forward of the doorway. The filler cap has a “T” bar in it

to aid removal. The lubricator drains directly down beneath

the cab floor. The drain valve is the lever in the left hand cab

door. The closed position is with the lever vertical. To drain,

turn the lever to horizontal position. To blow down the

lubricator you must also have steam in the boiler and open the

steam regulator, ensuring that first you have placed the

locomotive in mid gear.

The boiler water filler is on top of the steam turret on the

boiler in the middle of the cab. Undo the knurled cap to fill

with water. The main steam regulator valve is the wheel valve

on the rear of the boiler-filling turret.

The direction control is the hexagon nut in the centre of the

cab floor. To put the model into forward gear put the hand

wheel tool provided with the loco, over the hexagon and turn

the wheel to the left (anti-clockwise). To put the model into

reverse gear you must turn the wheel to the right (clockwise).

Turn the wheel until the rods travel fully to the top and bottom

of the expansion links (vertical slotted rods).

Preparation for Running

Your Garratt is fitted with a water gauge; this allows the driver

to keep the model in steam continuously for longer periods of

time than the usual single fill system. This is done using a

Boiler Top-up System provided with your model. The initial

fill up with gas, oil and water is the same as for a basic run, but

then to carry on and run for longer periods requires supervision

of the boiler water level, topping up of the lubricator and

refilling of the gas. These procedures will be explained in

another section after the Running section instructions.

Always service the engine in the following order; first gas, oil

then water.

To fill the gas tank: invert the gas can and apply the nipple to

the gas inlet valve on the top of the tank turret. You will know

when the tank is full; gas will blow back from the inlet valve in

a strong jet. A small amount of gas and air will escape during

filling, but the difference between this and when the tank is

full is always clear. Always keep the gas can vertical when

filling the gas tank.

Filling the lubricator:as you will read in the instructions for

the end of the run, the lubricator should be empty of oil and

water with the valve left in the open position. Now close the

valve and remove the lubricator filler cap. Fill up the lubricator

with steam oil to about ¼ of an inch below the top. Leave the

filler cap off for the present, so that any trapped air can escape.

It can be refitted after you have filled up the boiler.

To fill the boiler:remove the filler cap. Fill up the boiler to

about ⅔ to ¾ the way up the water gauge –ideally use filtered

rainwater or distilled water using the large syringe provided.

Replace the boiler filler cap, check that the lubricator does not

need topping up, and then replace its filler cap also. Filler caps

should be firm finger tight. They are sealed with a trapped „O‟

ring and, therefore should not be over-tightened.

Lighting Up

As the gas tank is remote from the heat of the boiler, the gas

will not vaporise easily in cold conditions, i.e. below 20

degrees centigrade (68 degrees Fahrenheit). To help this

problem the gas tank is placed in a water bath. When you have

filled the tank with gas add HAND HOT ONLY water to the

water bath to about ½ an inch up the gas tank. NEVER USE

BOILING WATER. Do not do this before filling the tank

as you may have difficulty in filling the tank.

Open the smoke box door; just pull it open by the door handle.

Light your lighter/match etc. and gently open the gas control

valve until a gentle hiss is heard in the burner. Apply your

light into the smokebox and the flame should „pop‟ down the

fire tube and ignite the burner inside the fire tube.

Alternatively you can leave the smoke box door shut and light

the engine via the chimney.

If the gas valve is opened too much the flame will not pop

back; it will either fail to ignite, will roar in flame out of the

smokebox, or there will be a ball of flame around the front of

the engine, which will then blow the whole fire out (after

giving the driver a fright)!

When the fire sound has stabilised, after about 30 seconds the

gas can be turned up until a healthy roar is heard. The smoke

box door may be shut after about two minutes. Now leave the

locomotive to raise steam.

Running

When the engine has raised about 60 to 70 psi, you are ready

to start running. The Garratt is fitted with cylinder drain valves

to aid the removal of condensed water from the cylinders, until

the engine has warmed through. Looking under the cylinders

you will see a long rod with a lever at one end. These are the

drain valve control rods, the closed position is with the lever in

the vertical position and open is with it in the horizontal

position. Before commencing your first run of the day, it is

advisable to open all the cylinder drain valves, and also put a

cloth loosely over the chimney for a few minutes, as

condensed water may be ejected from the chimney. This will

help to keep your model cleaner. This is quite normal; the

motion of the engine will be jerky until all condensate has been

ejected. DO NOT stand over the chimney as ejected boiling

water/steam could cause serious scalding.

Turn the direction wheel in the desired direction and ensure the

engine is in full gear, and then open the main steam valve. The

engine should start to move. When starting from cold it can be

jerky, this is normal, as it has to clear the condensate from the

system. The more the main steam valve is opened, the faster

the engine will go; our advice is to start slowly and learn the

road with your engine

After a minute or so, remove the cloth and continue running.

In running it is correct practice to balance the boiler pressure

against the load being pulled and the track conditions. With a

light load and level track the pressure may need to be only 50-

60 p.s.i. therefore, turn the gas control down to keep this

pressure. When running a heavy train with steep gradients,

increase the pressure by turning up the gas.

The ideal running pressure can be learnt by experience and is

one of the pleasures of running a live steam engine. There is

no need to have the safety valve constantly blowing off (it is

what its name implies –a safety vent for excess steam

pressure). In all our designs, the gas has been programmed to

run out just before the water, thus it is important not to refill

with gas alone in order to lengthen the run by a few minutes.

When the gas runs out a complete gas, oil and water service

must be done (remember GOW, also remember to shut the gas

regulator before refilling, and DO NOT refill with gas near

any other live steam loco). When the locomotive slows as the

pressure falls at the end of a run, stop the engine. Gently open

the lubricator valve and blow out any condensed water. If you

intend to continue running, close the drain when you see oil

coming out of it and carry out a general refill. If it is the last

run of the day, leave the lubricator drain valve open and blow

the lubricator completely clean.

Continuous Running

To run for longer periods of time than the normal “one fill”

system you will require the Boiler Filling System supplied

with your loco.

This new boiler filling system has been specially developed for

the Accucraft NG16 Garratt. It features an all metal vertical

hand pump; the ram is fitted with an „O‟ ring to improve seal

and allow higher pressures to be handled. The filler valve is of

the „Goodall‟ type but features the special „Finescale‟ bayonet

attachment. This „push and twist‟ fitting means you no longer

have to hold the hose in the filler valve while pumping.

The pump body base is tapped M3 so it can be secured

wherever you want. We have supplied a small aluminium

water pot which has been centre punched on the correct centres

for the pump fixing holes. Should you wish to use this

container, drill out the centre pops on the underneath of the pot

to 3mm dia and using the washers provided as seals on the

inside of the tank. Bolt the pump down using the bolts

provided. You will have to shorten the bolts by about 10mm.

We have provided long bolts in case you want to screw the

pump down to a thicker base material and use a different water

source.

To use the pump first fill the water container. It may then be

necessary to prime the pump by sucking through some water.

Fit the new filler valve in place of your existing boiler filler

cap. To connect the pipe to the loco for water transfer, locate

the fitting on the hose over the boiler filling valve, ensuring the

slots on the hose fitting line up with the guide pips on the filler

valve, push down and twist clockwise to seal. Then just pump.

To disconnect after pumping just twist anti-clockwise and lift

off.

For the first fill, service in the normal way. Then run for about

15 minutes, now have a look at the water level. You will

probably need to pump some water into the boiler. Connect the

tube fitting onto the loco and pump water into the boiler until

the gauge glass is showing about ¾ full. Keep an eye on the

water gauge and try to run between ½ and ¾ of a glass.

After another 15 minutes running you will need to refill the

lubricator and top up the gas tank. Also check the water level

and top up if necessary. Stop the loco in a convenient location,

away from other locomotives and turn off the gas. Ensure the

fire is completely out and then top up the gas tank.

Blow around the engine so there is no residual gas about, then

re-light the fire. To refill the lubricator, first put the loco in

neutral (mid gear). Open the drain valve then gently open the

steam regulator. When the lubricator has been blown clean,

close the regulator and remove the lubricator cap. Now close

the drain valve and refill with superheat steam oil to the correct

level. Re-fit the lubricator cap. All this time the engine has had

the fire alight and will have a good head of steam, so now

carry on running.

Keep an eye on the water level at all times and try to refill the

gas tank and lubricator every 20 minutes to half an hour.

End of Run

As previously mentioned, the locomotive will slow (due to

pressure dropping), when the fire has gone out, stop at a

convenient place and open the lubricator drain valve. Blow

out all condensed water and the remaining oil. Leave the drain

valve open and allow all the remaining steam to blow out. The

locomotive should be allowed to cool. When cool, clean the

engine, check the motion and oil if necessary. The locomotive

should always be put away in a clean condition as it attracts

less dust and is always ready for the next run (or to be shown

to an admiring friend). Always leave the lubricator drain valve

and the boiler blow down valve open, so that the boiler will not

be strained if subject to any temperature change. It is advisable

to store the locomotive where any residual drips of oil or water

do not matter.

Blocked Gas Jets

The gas jets of your Garratt are fitted with jet filters so in

normal operation blocked jets should not be a problem

However if the gas jet becomes completely blocked with

particles of dirt within the gas, the jet will have to be removed

and cleaned. Pulling gently backwards remove the pipe and jet

holder assembly from the burner. You may find it easier to

also remove the cab roof and rear cab back

Holding the jet holder gently in a pair of pliers, unscrew the

jet. To clear, place the jet nozzle against the inverted gas can

nozzle and clear the jet with a blast of gas. Under no

circumstances use a pricker wire, this will damage the jet hole.

Replace the jet in the holder, ideally using a thread sealant

sparingly on the threads. Ensure it is tightened up firmly. Now

test CAREFULLY for gas leaks, first with a 50/50 mixture of

washing up liquid and water, and then if no bubbles are

showing, with a flame and the gas “just on”. Tighten if

required. Now replace the jet assemblies back into the burners.

Gauge Changing

All Garratt locomotives are supplied set to 45mm gauge, but a

“gauge change” kit is supplied with each engine. This will

allow you to run on either 32mm or 45mm gauge track. All

wheels are insulated as standard. To change the gauge, lay the

engine gently on its side, on a thick cloth, loosen all the grub

screws in the boss on the back of the wheels using the Allen

key provided. The axles are dimpled for each gauge, so you do

not have to measure for the right gauge. Slide the wheels to the

gauge required and tighten up the grub screws. These should

be checked as a routine at the start of each running session.

***************

As with all comprehensive models, we strongly recommend a

full demonstration (by our agents) before purchase, enabling

you to get the best out of your model right from the start.

HAPPY STEAMING!

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