Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1919-12-28
.s|MPL|F|ED AUTO LESSONS
GUeRRLICH EXPLAINS CAR
NOISES AND THEIR CAUSES
Machine knocks. ltumminG. GrowIiuG.
Scratching md Grinding EA-
planned by Expert.
ny FRED. {. GlERRIIJu. ". T..
M,

ny FRED. Z. GtERRLICu. VI. l..
Lesson Va. Ia.
In studying tho places OF the car
iEom which noises can come. Let us
take up the units OF ii. one by ono
ond see how and why noises can dc
W. have already seen how noises
caa develop IN tho engine. 50 that the
Is tho clutch. While play between tho
grooves ~ the discs Of 4 disc clutcl.
arl thc.: key pieces VIII. cause "a
knock'ue which viii seem to come
:rom tho engine, clutch noises are al
most always due 10 the throw-oui col q
sr aud bearing. This will bc a grind
ing noise. II is hard to Keep grca -
~ oil on TINS bearing. but IS there
Is no load on the bearing, unless tn"
driver rests his foot on tho clutch
rcdal so as TO put some pressure on
thCrc * little chance for wear Many
drivers, however rest their foot on
INC pedal constantly Is described
above, and 50 cause q wear. which soon
VIII develop into a grinding moist"
(: inc grinding SOUND stops when th"
ciutoh is disenEaged, then YOU can DE
reascpsbly sure that the clutch throw
out bearing = TO blame.
Gears Hum or Growl.
Next after the clutch comes the
TRANSMISSION or scar set Even on
verse, low or second. This Is due
to the setting OF cutting of the gears.
II the noises develop with the using
Of The car. thcn II may hr due TO lach
Of iubs!CatlJH 70 Worn bearings and,
ON an older car 10 Worn gears Eo-
placing or repairing the bearings Is
The only remedy. II there is a scratch
ms sound Nnlic IN nIEn. then Tho Lear
mss arg broken OF cut UP, and Mood
After the transmission comes the
!aiNersai !olni. y squeak from these
n Is "a NtHE I#.asN nhts
3cce loratinE the car when going over
fought roads, or when tile engine is
missing. Is = sign that The pms or
sroken. II should be investigated.
Universal joints ar, much neglected as
4 hnock very much like tha, Of the
universal joint. nut coming Just under
the left front scat, viii be due To wear
~ the bumper % the torQue arm AND
- supporting pin, or To the bumper
SprinS Ucing broken.
The dinercnt!aI assembly is the next
unit from which noises come. It viii
are not properly set. IT they are Worn.
II the bearings are worn. or II there
= TACK Of iu"ricauon. Wncn ;he hum
deHclops wIth tho aGe OF the car. IL
need io, be worried ABOUT. nut ID there
- srowl after work has been done
On the dif.renllal. or its parts or IN
q new car then the scitinS % tho
gear and pin!rn should hc checked ~.
iir"kcn tcnrinSs Indicated.
II the sroNl is scratchy. thrn the
bearings most likely the forward
Or raCe"ays are crushed. or something
mas gotten into them. The bvarinEs
u The rear wheels may be at iauli, rs
the sound VIII travel along tn" ;Nlc.
snaft ana seem to come from Tie ,Ilf-
feren,ial. Replacing is about INC only
remedy.
terent!a gear there Will bc knock
ing, which vii! come every revolution
Of the wheels.
From ine dlifcrcntal We come to The
rear wheels, on which are the brakes
\ dragging brake, or Il brake Nynicn Il,
ooSc SO That the band rubs against the
sue ef tue drum viii cause i bell
ANe scraichy mouse Many Things may
cause this, and only a study OF the
niak' MA show the cause and remedy.
u me wheel does not run true the
causing q similar noise
\ loose wheel bent axle OF housing
MI cauSr an irregular rubbing sound.
ana, OF course, such :, sound. and in
iact, all runbinG SOUNDS. suou.d ~. ~
.stlS"leo. Inc noise may Indicate a
ranS.rous e"nditlou, or one Which
HctE not DC worried about
\eA' como the springs. .nck Of ,uhri
ust.%A OF the spring snackle bolts. or
~ the leaves. VIII rcSul, In Il snlteak
"a f"usA roads The cure is obvious
."osc nodN or fender bolt; o. lous, lu.;
ootS .. tie d.mountably rims. Itr IN
- aiso ,oiieu he cause of q squ"ak
IN: IRVING gears Of tho spocdomc-
- esp E'iiN When they are placed on
'Ie 90: ihe front wheels. Wil worry
.o,,nd S'Hss I'm 'nn"yins srratchns
1n3" mat a SINAI! piece 90 gravel has
."dShd ~ the tecth ut one Of h, sralS
le rrn"Nh' OF which w,l eliminate
~ "ourse, there .rr .nnumcrabie
g'n%r n!;a,SeN, such loose hood
q, ~