< Mechanical Lubricator >
William's lubricator is typical Wakefield type. The original drawings show it is between the main frames. However I draw it out on the running board for easy maintenance. As my William is 1 in. scale, it isn't so much oversize. The operating arm is driven by expansion link of the valve gear.
<< driving parts >>
The photo shows all of the mechanical parts. The middle one is brass pump body. The valve seat was cut with D-bit, reamed and finally done 'seating' with a hammer.
The ratchet wheel is made from high carbon steel rod. With the lathe head as an index table, each teeth was cut with a sharp tool moving to and fro by hand. Finally the rod was parted off, hardened and tempered. The axle is made from stainless steel and the wheel was glued onto it with Loctite.
The bridle is made from silver steel. After milling the inner hole, it was cut to a shape and tempered. The ram is made from stainless steel and glued into the bridle.
The eccentric is made from phosphor bronze. After turning in the lathe, eccentric hole is open in small boring machine.
The driving pawl has complicated shape. Three holes were drilled first, then a paper pattern was glued onto it and finished with fret saw and file.
The operating rod was made from mild steel bar. It was finished with a flat file and three pairs of brass rollers. Each roller can rotate freely. File all around the job until the rollers rotate, then you can get precise outline.
The spring socket was made from phosphor bronze rod. The photo shows how to cut four grooves around the socket.
The coil spring was made from stainless spring wire. A suitable size of drill shank can be used as a coiling mandrel. Note a brass support in the tail stock to avoid warp of the mandrel.
<< hand wheel >>
I decided to add a hand wheel to the lubricator for an accent. Of course it is useful when you want to supply oil to cylinders quickly.
The wheel is made from two components, inner boss and outer ring. For the former, I prepare brass square bar and cut four arc with end mill, then it was turned to a desired diameter.
Next, the outer ring was silver soldered onto the boss, then whole job was turned to a final profile. The center square hole was cut in the same way as the smokebox door handle. After all, handling cock was silver solder at one end of 'spoke'.
<< oil tank >>
The oil tank is made from brass sheet. Assembled with small screws, the whole job was caulked with silver solder. Then the screw head was cut off with a file.
Assembled lubricator. The check spring was made from phosphor bronze sheet. Providing for worn out, the spring holder was made adjustable.