AML PENNSYLVANIA K-4 4-6-2, Instruction Manual, Page: 7 / 12

PENNSYLVANIA K-4 4-6-2
Drain Cocks:
This locomotive is fitted with working
drain cocks on the cylinders. When
first starting out, the cocks should be
open (levers moved to the “outside”
positions). This will allow water in the
cylinders to drain while the cylinders
heat up to working temperature.
As steam enters cold cylinders, it
condenses, so expect a fair amount
of water to come out at the beginning
of each run. Once cylinders have
warmed up, you can close close drain
cocks. To close them move the levers
to the “up” position.
Running:
Move the reversing lever at the right
side of the cab to the forward posi-
tion. With the engine on the track
and without a train, open the throttle.
The engine may need to be pushed a
little to overcome the steam condens-
ing into water in the cold cylinders,
but open drain cocks will minimize
this. After a few moments, the engine
should take off on its own, moving
away smoothly.
Axle Pump:
Some of models are equipped with
an axle pump and bypass valve. The
pump moves water from the tender
to a check valve on the locomotive.
The bypass valve is located on the
back right side of the cab. When the
bypass valve is completely shut, water
is pumped into the locomotive. When
the bypass valve is open, the pump will
re-circulate water back into the tender.
With careful adjustments of this valve,
the engine will always have enough
water to keep running for long peri-
ods of time until the tender water tank
needs to be refilled. The tender is also
equipped with the hand pump, which
needs to be used to prime the axle
pump. Only two or three strokes are
necessary to prime the pump.
Shutting Down:
To shut the engine down, simply close
the fuel valve.
After the fire is out at the end of the
run, open the blow down valve and
Adjustable Lubricator
Pressure
Gauge
Water Glass Throttle
Filler Plug
Bypass Valve
6