Fig. 116. Differential Assembly
[Fig. 116] shows the differential gear assembly which is carried by a set of bearings. These bearings are held in place by a set of shoulders, or retainers which are built into the housing on each side of the differential assembly. These bearings may be of either the radial, roller, or ball type. However, when the ball or roller bearing is used for carrying the differential, an end thrust bearing must be used in conjunction to take the end thrust and for adjusting purposes. The differential assembly shown is known as the bevel gear and pinion drive. The pinion gear is keyed to the tapered end of the drive shaft and usually does not carry an adjustment. The bevel gear mesh adjustment is made by setting the bearing supporting the differential assembly backward or forward. This adjustment, however, applies mostly to the full floating axle, as the axle shaft in this case usually has a square end which slides into the small bevel gear of the differential. The shaft used in this type of axle may be drawn out through the wheel and replaced without disassembling the axle or removing the weight from the wheels.
Fig 117. Differential Adjusting Points
When the Hotchkiss drive is employed in combination with the semi-floating or three-quarters floating axle, three adjusting points will be found. [Fig. 117] shows the three points at which adjustments are made. The short drive shaft carries the pinion gear at the rear end, and a universal joint at the front end is supported by a set of radial bearings inside of the front and rear ends of the housing.
The adjustment on this shaft is made by turning the notched cone A1 to the right, which pushes the bearings farther upon the bearing cones and reduces the looseness. After the short shaft has been properly adjusted, remove the lugs B, which fit into the notches of the adjustment nuts, A2 and A3, and turn A2 to the left to loosen, now turn A3 to the right until the bevel gear is meshing properly with pinion gear, then replace the lugs, B, to hold the adjustment. It is only necessary to make this adjustment when play occurs from natural wear, which will happen probably once in every five to seven thousand miles.
CASE
CAM
CAM FULCRUM PIN