When one wheel is soldered to each axle lay them aside and make some washers for the axles before the two remaining wheels are soldered on. These washers are placed on the axles between the frame and each wheel to keep the wheels from running against the truck.
Strip Washers.—These washers may be made from narrow strips of tin wound around the axles like a tightly coiled clock spring.
Cut a strip of tin ³⁄₁₆ of an inch wide and 8 inches long. Take a pair of round-nosed pliers and bend one end over at a sharp curve that fits about the axle wire. Hold the curved part of the tin to the axle with the flat-nosed pliers and wind the tin around the wire in a right coil taking fresh grip on the tin strip with the pliers each time the tin is wound around. Wind the tin about the axle four times and then cut the remaining tin away and use it to make the other three washers, see [Fig. 72].
Fig. 72.
Fig. 73.
Slip one washer on one of the axles next to one of the wheels soldered to it; then push the axle through the axle holes in the springs and then place another washer on it before placing another or second wheel on the axle.
The washers are not soldered in place but simply left loose on the axle.