Arizona republican., 1917-12-02

develop in this unit, if it is not treated with due respect. Axle shafts some times break, or again they may be twisted out of all reasonable shape. Bearings occasionally are crushed. The gears in the differential unit are peculiarly liable to chipping, a trouble that may result in running the whole mechanism.
 The most important item in the care of the rear axle is proper fabrication. At intervals at least twice per season. the rear axle housing should be flushed out with kerosene and then new oil should be installed. Note that it be oil and not grease, which is unsuited to this part especially so in cold weather
 But fabrication is not all. The func- ton of the rear axle, as we have noted involves the taking of torque or twist which puts heavy strain on the parts. IT they are not strong enough, trouble IS bound to result When part of the rear axle assembly breaks, it should first be ascertained what caused the break. Often the part get out of align ment and in this case, replacement will not help, for the unit must be strengthened up or the same thing will occur again. Aligning the rear axle is job for the service station, unless the owner is unusually expert as d mechanic. When an intermittent hum, noise with stresses or inflextions, comes from the axle, it may be ac cepted that the gears are running out of alignment or that they have suf- fered injury and are themselves warped out of shape. Chipping of the teeth is common and in this case, the pieces of metal get down in the mechanism and do further injury. T,, l,,l,, it must be remembered that too much is almost as bad as too little The excess oil works it's way along to axle tube and gets into the brake drums, interfering with their functioning This trouble may be cured by install ing felt washers in the ends of the | axle tubes. In many modern aXles this | condition is provided for by allowing | the oil to run out through a small hole | in the end of the tubes and some own CTS of older cars have followed this | practice by drilling holes in the tubes It is better, however. to try the felt washers to begin with and if these dc not serve. then drill a hole.
 In rear axles of the type having oscillating spring supports, these latter must be fabricated at the point where they turn on the axle tubes.
 Finally it may be stated that when ever the rear axle begins emitting 2 peculiar noise of any kind, it is time to get the car into the hands of the | experts at the service station. Mos rear axle adjustments and repairs art beyond the ordinary car owner
 differential adjustment (when thi, is possible though it is not in all cars
 is made by loosening two collars OF, on either side of the differential unit and shifting the unit either to the lief or to the right depending upon whethef more or less clearance is needed be tween the pinion and ring gear. Onl! experienced hands should do this work
 It is possible also in most cars to ad
 just the driving pinion alone. But thi
 the owner can do; give the rear aXl q chance by lubricating it at regula
 intervals and if any unusual noise de
 velops in the part. he can throw ul
 his hands and call for help, at once
 instead of allowing it to continue unti
 serious and perhaps irrepairable dam
 age has been done.