The Coconino sun., 1919-08-01
THINGS TO WORRY ABOUT
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TRUCK OPERATION

In mounting the flexible drive shaft of the governor care must be taken that there are no bends in the shaft within two inches of either end. The shaft must never be bent into a circle of less than ten inches diameter. The proper practice is to make all bends as long and easy as possible.
 In selecting trucks the factors Of weight and size of the products to be hauled must be carefully considered. A product that is bulky but light in weight calls for a comparatively light vehicle with large body capacity. On the other side of it. the man who must haul heavy material that is neverthe- less compact in form will make a great mistake if he buys an ordinary light truck.
 When trailers of any type are being used in connection with truck service it is to be strongly recommended that all cost and operating records cover ing the trailers be kept separately from those of the powered vehicle.
 Ford cylinders that are habitual oil bumpers may be cured by taking them out. removing the lower rings and drilling 8 one-eighth inch holes in each lower ring groove. The drilling should be down downward at a 457 degree angle. These holes serve to permit the oil to drain back into the crankcase.
 Grinding noises in the transmission may be caused by one of the following Lack of lubricant. insufficient lubri- cant. too thin lubricant, shafts out of alignment, bearings worn or broken or chips in the transmission case. Lu- brication is the commonest cause and should be first looked into.
 The transfer which drops the power transmission below the transmission shaft in the four-wheel drive truck needs just as careful fabrication as the transmission. It must never be filled with grease, but should be the same oil that goes into the transmits sion.
 The cables of the ignition system of the motor truck must be carefully watched. and should be replaced the moment they show signs of cracking or wearing. After a years normal service it is well to carry in reserve a few cartoons for the distributor plate and also contact spring and an ad- unstable contact screw.
 Trucks fitted with a winch demand little extra attention for the winch and winch drive should be fabricated once a month. After carefully clean ing off any dirt on the case, remove the top cover plate and put in enough transmission oil to bring the lubricant in the case up to level.
 In cases where there have been chronic oiling troubles and it is dou- bly, important to be certain at all times of the exact level of the lubri- cant in the case. it is simple matter to have two gauge pet cocks inserted in the case, one above the other. By this means positive knowledge of the oil level may be had, whereas any oil float is likely to stick and give false reading.
 If all the spark plug gaps are ton wide, the magneto can not be rotated fast enough by cranking to generate voltage high enough to overcome the resistance of the spark gaps in the combustion space of the cylinders and as result the engine will not start. But even if the engine is started and the spark plug gaps are too wide, the engine will miss fire when it is at- tempted to accelerate rapidly or when running with wide open throttle and heavy load. The insulation of the high tension winding or the condenser may be ptsctured, inasmuch as the voltage increases with the speed of armature rotation, the engine may be speeded up by gradually opening the throttle without causing the engine to miss an explosion.
 Springs break because of overload ing. badly rusted leaves. clips too tight, spring not properly fastened to the axle and because the shackle is imperative. due to a broken shacklc bolt or a stiff shackle.