Arizona republican., 1918-09-08
Practical Paragraphs

Tire Numbers
 Every tire has embossed on the side serial number. It is very important that the car owner should have a rec ord of this number in each case and such record should be made when the tire is bought. Not only is it desir- able to have this record for adjust ments with the company, but in case of theft, possession of the serial rec- ord is often valuable aid to the police. It is a fine habit to form, this record ing the numbers of all tires bought Carburetor Trouble
 When the engine runs jerkily, the obvious cause is carburetor trouble. To locate the trouble. prime the car buretor and watch for dripping. If there is no dripping, the trouble lies between the tank and the float valve If there is free dripping, the trouble may be looked for between the float valve and the engine cylinder.
 After Grinding Valves
 It is possible to tell just how sue cessful the operation of grinding valves has been by the following simple pro- cess: Mark the face of the valve all around lightly with soft lead pencil. Then place the valve in position turn it on its seat for few minutes and remove it. If the entire pencil mark ing Is removed, there is contact all around, but if anything is left. the point where face and seat do not meet is readily apparent.
 | Clutch AiIment
 If the sliding member. of the clutch | Is rusty it will give the effect of a | grabbing member. The rusted portion will prevent the clutch's engaging gradually holding for a fraction of a second and thus forcing a quick en- gagement. The operator often believes that the trouble is due to poor facine or worn engaging members.
 Spark Advance
 | wear and consequent poor adjust ment of tJe spark control 1inkage which prevents full spark advance, i. often the occasion for remarks as tr the sudden falling off in the speed ot the engine.
 l Oil Cups
 Many car owners are finding that oi cups may be substtutedsfor the greas, cups commonly used in many location, on the chassis, with eminently satisfac tory results. The oil cup need be file, but once month, perhaps and it need no turning down to perform it's func ton. However. where the grease cup f 10 De substituted, some sort of connec ton will be needed to keep the oil cu, straight NNi Easy On the Clutch
 one or the very commonest mistake
 in driving is the riding" of the clutch which perhaps a majority of operator
 indulge in. If the foot is kept con stantly on the clutch pedal, even thoug lightly, the action causes rapid wear e
 the clutch thrust bearing. and clutc slipping. If the clutch is of the con
 variety the facing is worn excessivel,
 While in the disc clutch in oil, the extr
 neat tends to thin the oil and permit
 grabbing, Drivers should keep off tn clutch. except when it is to be operated
 Installing Bearings
 When driving ball bearings int place. some form of soft metal yoke C , tubular section should be used. In thi ! way the hammer blows are distribute
 evenly and the bearing is driven hon1
 without injury. In using double yok
 member, one prong can be place
 against the inner race, while the othe
 rests on the outer race In removing bearing or part. the pressure should | applied where the part is tight fit o the shaft or in the housing. As a ger
 eral thing the inner race is tight f ? on the shaft, while the outer race is } push fit in the housing When it bearing. brass or babbitt metal bs 5 or block of hard wood should be IT
 terposed between the hammer and tl P part. Also the blows of the hamm, ] should not be all directed at one poin
 but scattered around, giving blows 2 succession at points directly opposit