
Mill Twin Cylinder Model Steam Engine v2 – Assembly Instructions v1.1
Copyright - Chiltern Model Steam Engines
Page 8.
21.
Valve timing is set with the angle of each Eccentric Wheel to the Crank/Piston position as
shown in the following pictures. Get the respective positions correct and then tighten the
grub/setscrew. NOTE: if both Eccentric Wheels are fixed 180degrees to that show, the
engine will run in the reverse direction.
22.
The steam inlets can be on top or bottom of the engine Chests. If, as in the following photos,
the inlet is on top, screw the 2 Chest Plugs into the holes on the bottom of the Chests. PTFE
tape or fibre washers can be used to seal the Chest Plugs if needed.