Arizona republican., 1921-05-22
Many Facts CoUered
 In SerUice Talk

1N OCTUECS QiR
 The lecture on Care and Opera ton of Motor Trucks" as given by Harold D. King. travelling service representative of the Moreland Truck company, on the evening of May 10, in the assembly rooms of the R. D. Roper Motor company, state More land distributors, was interesting and educational according to the senti- ment expressed by those who at tended.
 In all sixteen truck drivers and mechanics were present and after a complete survey of the different parts of a truck and their care was given, questions were asked and answered that proved beneficial to all. Each unit of the truck, including radi- ators, motors, magnetos, carburetors. transmissions, universals, radius rods and rear drives were discussed and advanced ideas as to proper care was outlined.
 For the radiators, in Arizona where water often contains alkai and other minerals in solution, King stated that at present the best remedy he could suggest for the elimination of scale deposits was sal soda but that the Moreland factory is Experimenting along these lines in the hope of finding a chemical that would promptly cure this trouble and at the came time net be injurious to the radiator and motor block.
 Motor design is fast turning to the full pressure oil feed type with hol- low crarxshaft whereby oil under pressure is fed to every working bearing in the motor, according to King This viii prove a great say ing to the truck owner and driver providing oil is frequently changed. New oil should not be added to the old oil in the crankcase but every 800 to 1000 miles ali old oil should be drained and new oil substituted If this policy is followed it will rarely be found necessary to add any oil to the motor between trainings in that the motor will actually burn very little oil.
 The new type of Aero magneto where the spark delivered at low speeds is just as hot as at high speeds was fully explained. This is a magneto that was developed for airpIanes during the war and marked a distinct advance in maSneto design and construction. Carburetors oc- cupied a very important place in the talk and among other things King SSClt1 t4tct tANg N%AS thoNS iNSttCiA sible for many troubles that in reality they should not be blamed for. Tt is too easy for the driver to change carburetor adjustments and it is too often done when it was not needed, ," he stated.
 Transmissions were given consid- erable time, in that many new ideas were now being put on the market. Keeping in mind the idea that after all simplicity is the goal of the truck manufacturer, he strongly recommended the single transmission and one lever. Compound transmits sions add greatly to the complica- < tions to be met by drivers as well as mechanics and while they give more speeds, the ratios between them cannot be so regulated that they are useful to a degree that the single and simplest transmission can pro- cure. King drew his listeners at tention to the fact that Moreland pioneered four speed transmissions and at this time are the first truck manufacturers to announce five speeds ahead in a single transmission with one lever control.
 It was the prediction of all present tbat in short time all trucks would use thermoid Hardy disk universals, doing away with metallic universals. Much stress was laid on the sim plicity and endurance of the worm drive in the rear end and the fact that the government adopted it only after severe tests of all rear end drives. Its chief feature is that ii is simple and all wearing parts have i adjustments. This is not so in many rear end drives.
 In closing King stated that al l truck troubles according to actual re- suits of tests of the $. A r. were found to be largely due to insuffi- eient fabrication and external care
 lessness In fact, S5 per cent Q truck servicing can be avoided by l properly watching the fabrication and keeping all outside nuts and bolt tight.
 Oil and grease are not changed Of 1 ten enough, especially in the motor: and rear end drives. Trucks are no
 kept clean enough on the outside
 whereas if this was attended to. i
 would be easy to find the bolts an,
 rivets when they loosen up. Kim
 is now on a trip through the stat
 calling on Moreland owners an,
 dealers and he contemplates spend
 ing month in Arizona. In the futur
 he expects to make regular quarterl,
 inspection trips in Arizona where al
 Moreland owners will be given tn
 benefit of his experience and the re
 suits of latest experiments at tn
 factory.