Accucraft trains DECAUVILLE 0-4-0T Instruction Manual - page 7
Page 7
With a light load and level track the pressure may need to be only 25-30
p.s.i. therefore, turn the gas control valve 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 learned 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 open and blow the lubricator clean.
Continuous Running
To run for longer periods of time than the normal “one fill” system you will
require a Boiler Filling system. This consists a pump bottle with tube
attached and a replacement boiler filler cab, which has a non-return
valve on its underside. 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. Lift and tilt over the
cab roof to uncover the filler cap, place the tube in the hole and holding it
firmly, pump water into the boiler untilo the gauge glass is showing ¾ full.
Keep an eye on the water gauge and try to run between ½ and ¾ of the
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).