How the tractor is made is shown in Figs. 4, 5, and 6. The chassis is 7/8 by 3½ by 12 in. The 5-in. drivewheels are screwed directly to this, but the 3½-in. front wheels are screwed to a rigid wooden axle, % by 1 by 4 5/16 in., which is glued and nailed or, if desired, screwed under the front end of the chassis.
Fig. 5. - Dimensions of the tractor, and full details of front, side, and rear. Compare with the photographs of Figs. 4 and 6.
The radiator is a block 7/8 by 3½ by 3 ½ in. Two more pieces are cut out the same size and shape as the radiator, or a single block made to be mounted 5 in. back from the radiator. Between these parts at the top is fitted a piece of wood as shown in Figs. 4 and 5. These may be glued and nailed together and then nailed and glued to the tractor chassis.
A slanting hole is bored in the back piece for the steering column. To the top of this piece is screwed a large wooden button mold, spool top, or wooden disk. The seat is a button mold or disk of wood, with a piece cut off. It is glued and screwed to a springlike form of wood.
Fig. 4. - The toy tractor is built entirely of wood with nail-studded "bull" wheels.
The engine block is made of wood. The sides slant in toward the cylinders, which are short lengths of dowel stick glued to the base block. The cylinder cover is a length of wood glued and nailed to the tops of the cylinders. Short spools also make good cylinders.
The large wheels may be solid disks of wood, sawn or turned, but the ones shown are made up of three disks of wood, each ½ in. thick, glued and nailed together, with the grain of the center disk running across the grain of the other two. This makes a very strong wheel, and it is also much easier to form if you have no lathe. You can cut the disks with a coping saw.
Six holes are bored in each wheel to make it more realistic. The cleats are upholstery nails with cone-shaped brass heads driven in the rim; or, if you like, short lengths of wood may be nailed across the rim for cleats, as on some tractor wheels.
The front wheels are each made of three disks, the center disk being of laminated wood, if available. (You can make small pieces of laminated wood by gluing firmly together thin berry-box wood, the grain of the center piece running at right angles to the pieces next to it.) This center disk is glued between two thicker disks of a small diameter. to make the characteristic front wheel of a tractor.
Fig. 6 - The tractor and the truck as viewed from both the front and rear.
The tractor wheels are painted Chinese red with silver rims and cleats and the steering wheel and seat are of the same red. The chassis and other parte of the tractor are painted jade green, except the engine, which is dull gray. The front and back of the radiator is silver, as are the filler caps.
Small shaped bits of wood may be attached to the engine block and painted with gold paint to represent carburetors and other brass parts.