South Bend News-Times, Volume 36, Number 250, South Bend, St. Joseph County, 7 September 1919 — Page 19

THE SOUTH BEND NEWS-TIMES

sum.v, M:PTnMm:n 7. 101

Knocks and Rattles in the Motor Car; How to Find Causes

th?s parts is the only procedure ".hich will defer the de e!op?n '

BY G. T. SCHAEFER, M. E. It is the piiroo" cf tK- artirlr to consider the cause of noise in the power transrr.'. :.-.icn system, r hi .sis and body. The noises ari.-'rv the tr-n mission are chiefly due to the Rears. Th-se may K-crmvcrn through constant use so that they do not mesh' correctly, 07 may be thrown out of alignment by bearings corr.inr: loose

In th

r. makiriL' of t.T. rrars thrv arr cur and thn K.-Jn

which causes them to v.T. rp more or less. It is a difficult matter to grind them, and so they must be left in this condition. Only a certain amount of warping ?s permissible; however, when the warp is pronounced a sintrim; noise will result. One must also be careful in shifting rears so as not to clash the teeth, for, should this occur continually, the edes of the teeth will become badly battered and will cauyc trouble as above. A c! it' ii th it ! s not r-U as I jTop'-r-y. .'-.. its to spin, j

vliifiiriK Mit" wt'iir in t li

will a !s i:. ik r r.oi.cy. Consi'Irihl

tea rir.es may rhanq ih iistano-('twf-c.'i th- i:;ain ari ountr.shi f t ar".. fills r.:i:sin th-ars to rr.fsh ;mjro;-rly. i'liin h-arin trr-.ir-:ir yjiTj.i !Iy s-'.isr? ptiMo to this trouh. Mi'-h uo-r .iltorir thf pitch linr of th" K-arM possibly to uch an rxfnt that tho t-f th of ono Krar will ptirk on the mtal Uf of tho oth-r bHo-.v tho bottom of thr ire:. Wear in tho hlftincr mhanism will also m;is noi- by prvontin tho frearH from shiftinp properly. Theso remarks apply to tho sliding r typo of transmission. In tho r.-o of th planetary sstem. corrort alinnnnt is n' cs- ry, an b"for and in addition tho bushings on th" piil! :? rs and shaft, etc.. must lr wau-hfd. as tiioy mu.-t not li.'ivr any tr.d-ncy to v ohhle sidtv.ays and raw so noi-o. a loos? planetary transmission can causf inoro if.'.l noi than almost all of tho rot of th" parts put toKothtT. I,ulri a t ion Inixrt-:iut. In both of the a how c.-iscs howl!np vani.ehs when the hih pear is "In" as all roars are oat of rnosh and tho driw i.- direct in the tdidinc prerir by means of a positive clutch, and in the planetary type by locking the whole system of pears together and allowiiic thorn to reoh" as a m.it. We are familiar with planetary transmissions howlhi h is eident with the old typs of fords. whi;'h have s"cn 1 n.c:dcrnb!e usapre. Iick of proper I'lhrlcation will also cause a noi.y transmission owinc to wear of the tooth and boarIf the jiiti of the universal Joints an- worn to any extent, it will manifest ifs'-If bv a distant knock when the lutch is encapred or whenever the driv" i interrupted. This is jtKn tru" v. l.t-n the brakes are applied. fit:!.-!, rt in Order. Th" .-has-is. with front and rear axles. fpnd"!s, etc., is n?xt in order. The rtar axle, especially is a source of noise if poorly designed or piven poor care. Particular care must be ;:icn to meshing the pears the

ti 00 r distance apart and to keen- I

uir th" pinion shaft hearing front i"'fiitnii!? loose, as this would al1 w- xht- 1riin-T pinion to limb the larpe bevel t:..ar and tend to pet out of It. projer plac". dear noise is I'Tso r;ucd by worn thrust washers or hearings which ai" proided on th" differential, as thev will perj;iit a similar condition to exist, as tlr.s would b" jart icula rly notice;;bl" ir turntnp corners. With a M'Tiii-tloatinp ax!e this would not happen unless a wheel bearing was badly worn. A peru'i ir nois" will also CK?cur if the wheeN are driven by jaw l itt Ivs wht ; tliese b pin to wear, v. :th the r-s i!t that whenever the

Boor fit

iHT tr ) head I j CCLT

'KiM-n arÜ cause a rattle. Worn ! slu ing shackles and bolts also cause J considerable rattle. particularly

when Hotchkiss drive is used. Urako and Control Ldnkape. Operating linkapes, which include clevis or forked, and pinned connec-

1 tions. ball nnd socket joints of the

stecrinp linkage, etc., are capable of doing a preat deal of rattling: when they become worn. Splr.dles on an axle end occasionally become loose and require new bushlnps. The brake pins may become loose In the hole and Fhake apalnst Its sides, and the rod may wear looso in the fork, so that there may be a shake in two places where rouph pavement is being traversed. Parts of this kind are not generally pro-

cry ft

Qo o: vided with any special means of lubrication, ami are at best bdt occasionally visited by the squirt can, and as they are exposed to much dirt, and mud, they wear rapidly and develop noisy tendencies x'ery early. The brake linkape. the front axle tie rod and pear shifting mechanisms of amidshlp or rear axle transmissions, are examples of this class of parts. As a rule, when the pin of such a joint becomes noisy in its hole, the only remedy Is a slightly larger pin in 'frh'e drillcd-out hole, but side-play of the parts can sometimes be taken up by springing the sides of the fork together a little. Occasionally there are means of adjusting the parts more closely. The frequent wiping and oiling; of

rattling tendenies. In assembling the control linkages, there Is sometimes insufficient clearances left between the various rods and other parts of the car, so that under extreme vibration parts strike together. The springs of the brake linkage being flexible, are occasionally found to jar against other parts. When anything of this kind is found to be possible and it is not practical to give parts sufficient clearance, flat springs or tape can be used, when they interfere, to separate them or deaden the sound of their striking together. The front wheels must be kept ilght on their spindles or side play will develop. This is a common cause of chipped races and broken ba Is. The springs should have oil or graphite inserted between the leaves or a continual squeaking will result. Spring clips must be kept tight bo that there will be no opportunity for the leaves to work upon

one another. Sometimes the clips will become extremely loose, owing to the nuts falling down, and there will fce a violent shock whenever a bump is ftruck. Fenders Sometimes Tint tic. Fenders are sometimes the cause of considerable rattling. Their riveting to the irons which support them may not be .absolutely tight, or they may be fitted so closely to parts of the .body or frame as to almost but not quite touch. Under the severe twisting stresses met with on rough roads, the fender may strike against the frame or body. Their attachment to the runningboards may work looso or never have been set up properly. Striking all the fenders with the clenched fist will usually bring out whatever possibilities of rattling they may possess. If everything is tight only a dull drum-like sound should result, but If any rattling can be brought out, the parts which strike against the other should either be positively held apart by means of a small pleco of rawhide or leather, or forced permanently together by tightening up the fastening devices.

If tho fender is Insufficiently braced or is not of adequate thickness to insure rigidity, tho unsupported ones will vibrate on rough roads, etc., and produce a continual rumbling noise. A large portion of noise outside tho engine may be traced to the fenders. Hoods and Pans. The pan under the engine is another portion cf a car which l capable of making; considerable noise if it is not properly fitted and most rigidly secured to the frame. If it is permanently attached, looseness is not likely to develop, although occasionally some of the holding nuts may work loose and allow opportunity for it to shake against the frame. Pans which are detachable and are dropped occasionally to enable repairs to be made are much more likely to become noisy from lack of tightness of holding devices Wooden pins

or strips of leather should be inserted at the points of rattle to .ieaden the sound. Occasionally, through deterioration rf lacing or loss of strength of the uprlnps used to hold the hood down, it may become very noisy. In such cases new lacing and springf should lie supplied. Sixcdomctcr atwl Drive. The flexible shafts and speedometers, especially when driven from the front wheel, are sometimes so carelessly installed that they rattle when they pass through the fender or metal dash of the bjdy. and the remedy is to give the shaft a strong definite tendency tc lie against one ride vor the other cf the &pace through which it passes or to bush it up with some nonsonorous suf,stance such as rubber. In this connection, it may be remarked that the copper tubing connections of pas tanks are sometimes located close to metal parts so that vibration will cause them to strike metal parts. Piping of this kind should be securely fastened with clips. Ikxly ami Fitting. Another cause of noie is the body with its complement of top

ti 0 00- f4

wind-shield, lamps, accessories, etc. In the course of time due to frame wearing the bolts which secure the body to the frame will v loosen, and the result is the development of creaking and dull thumping sounds as the car passes over bumps. These bolts should be frequently Inspected and tightened. After long usage th Jumpers against which the doors close, and which 6hould hold the doors fast when they are closed, loso their form and no longer prevent a shaking action between the doors and their Jambs. A rattling action is then set up which is most disagreeable. Where this occurs they should be renewed. Rattling of tho floor board eof tho tonneau when there aro no tonneau passenpers Is not uncommon in the old types of car, but this can be remedied "by closely fitting the boards so that they cannot shift. Top side-arms, when top is folded and arms are In their supporting sockets, will vibrate to and fro unless prevented from doing so with leather or rubber washers. Modern cars are fitted with side door clamps which effectively do away with this cause of annoyance. The lamps, if of cheap construction, will sometimes shako apart when soldered together, and rattle. All joints in the wind-shield must be kept tight and the springs which hold the locking sockets in contact should be kept well tensloned. Oil cans, pumps, Jacks, etc., must be packed so as to be solid and tight. Sometimes owners make a practice of carrying a gallon can of oil under the hood; when this gets about half empty the sides will buckle like a boy's tin snapper. Tools loosely packed in the tool box without cloth or waste around

V. .- .

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c r is this lo.s':arp :

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el a t"v;

motion is ta'-xen u with a lap. Tl:-; 'Ail! pcn rally be

noticeable in ortest d tr.:t::c when the appl.ed tori'.:e 1 far liom continuous. icc.isiina!!y wlv !."- cause s ;'iea kmg due to the habs be oiaiep loose or the- sjH'l.e dring ov. This is aI.;o truo of th" tim. Uattlimc Kadiu Kod. Iladiws rods wlun used are sometimes a prolit'.c source of no;s-, if improperly adju.-t; ;. I:, th" case ,,t the b ast lost motion at c.tht r i-r.d of the rods th";- ''-.H 'a Hi" iraa iut .ly, especially w t;eu tr:i clir.

t r rough

I oa.is. Wil n ears ha e

three-point 1 a I i ti rods, m which one end of each is -ir. d to 05. po- :: siiK s of th" axle, th. oth- r eiiabeing unite. 1 arid ö . i :n Sali a::;

it. tl.e r.ill O l iO . .,-.

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ii ni

ls is parto

ü'-cniint of th"

th" ball a torque the axle 1 nc: rite-!

t:i..r:y r.a. amount

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end toes thro. luli. When rod is b 'Ited to one side ot

h o 1 1 -in a

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and tho other b. r ;kttaclit or . .1 .0 11 -

is !o o o o o o o o ; o iO ! o o o o o o o 0 o o o o o o ,s o o o o o o o o o o

Modern and Fireproof

-THE NEW

Casboe Gara

144-146-148-150 UNCOLN WAY EAST Is ready to take care of transient Motorists Attending The Fair This new garage South Bend's largest and most modern has nearly 13,000 square feet of floor space, devoted especially to the storing of cars. This big room, as well as the entire building, is as nearly fireproof as modern construction can make it. It is equipped with the most up-to-date tire appliances all this for the safety of cars and the protection oföwners. The garage is centrally located not far from any of the hotels. This makes it the convenient storing place. Expert mechanics are in charge of the repair department to remedy any trouble with any part of any car. Our gasoline and air station is always at your service.

Don

Gar a

o o O o o o o o o o o o o o o

O' 01

o o o o o

JEFFERSON BLVD. AND LINCOLN WAY EAST L. J. CASBON, Proprietor.

them will Ft up a most distressing jangling, and the same is true of other articles of metal. Striking Tarts. Sometimes fan blades -will workloose and strike tho radiator: thir will also happen if the fan support becomes looe or bent. Pan belt? will crack if they become hard and should be kept pliable. Fan noise is not difficult to locate when it starts. If the speedometer wheel pets "out of round" the gears will prowl rhythmatically, or else will fail to mesh at certain points, thus ruining: the pears in addition to making1 noise. In Conclusion. i-'ometimes these rattling noises are quite difficult of exact location, especially for the operator himself, and the "best method of hunting them down is for the car to be driven by one person, while another

per?on skilled In such matters rider t upon the running boards in turn.j in the tonneau with the floor boardc ; up. and in other places of vantage ! the car meanwhile being driven ; over rough roads at a fair pace. i i

As a. rule, a new car from the factory is nearly or wholly free from rattles, which a rough road rendeni very pronounced, but occasioneJly some defects of this kind

escape the notice of the factory In-1 ppectors. More often rattling noises ' develop after a car has been used for sometime, and has seen hard ! service over rough roads without having received the most punctili-j ous care. The harder the tires are J inflated, the more conspicuous and numerous thes rattling sounds become. (Copyright, 1919.)

YOUR

Drive In Under the Star IT PAYS You get good gasoline all the time. This means a consistently high mileage average. How much higher that is we cannot say. But some motorists are getting 10 to 20 per cent more mileage with TEXACO GASOLINE Look for the Star. Get TEXACO GASOLINE And TEXACO MOTOR OIL Get more mileage with less expense. INDIANA PETROLEUM COMPANY, Distributors TEXACO PRODUCTS. Downtown Office 116-118 Lincoln Way East. Warehouse at Washington Av. and New York Central Tracks.

at im

LOW

These Tires are Real Bargain;

But Our Supply is Limited

Get Yours Before They All Gone.

Ars

30x3y2 $10.50 32x3y2 $14.50 31x4 $17.50 32x4 $19.50 33x4 $21.50 34x4 $22.00 35x4y2 $26.50

OPEN EVENINGS.

Oil EL

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128 E. Jefferson Main 2251

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FAIR

Cadillac Dodge Milburn

Electric

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C 4 3 9

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These Three Cars- each in a class by itself will be shown ail this week at the automobile show at the Intcr-State Fair. Wc invritc you to see them at our exhibit this week or at our show rooms at any time.

Cadillac Motor Sales Co.

O "W 7

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K Ä ?. i. A r : 1

213-217 S. Lafayette 31vd.

Main 1287

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