Aberdeen herald. [volume] (Aberdeen, Chehalis County, W.T.) 1886-1917, 1915-08-05

these should be inspected and II nee
essary carefully taken up. or If they
] are badly scored they may need to be
scraped. or in an extreme case they
will require replacing. In taking up
| the bearings great care should be ex-
\ ercised not to get them too tight. and
it should be noted that 1t is quite pos
sible that the reason your machine be-
gins to knock again after going 400 or
500 miles after the bearings have been
adjusted too tightly. When a bearing
is too tight excessive friction Is the re-
suit. and overheating occurs. This
wears the bearing away in very short
time and in some cases may even melt
the metal. The bearing should be only
taken up enough to remove all play.
1t would hardly seem possible that
the bearings should need scraping
after the car has gone such short dis
lance. but II they have been adjusted
! too tightly 1t may be that they are bad
/ ~ scored. ard II this Is the case scrap
ing will be necessary. This operation
should be left to the care OF an ex-
perienced and skillful mechanic and is
not job for the novice.
Kindly tell me the best way to true
up the wheels on car. feel that my
wheels are not running true.
Before anything is done be certain
that the wheels need truing up. Some
times all that is necessary Is to re-
adjust the tie rod. which connects
both wheel knuekles. Wabbling front
wheels may be caused by a bent axle.
bent spindle. partially broken bearing.
interior of hub worn. etc. The COM
mon cause is bent spindles. and good
repair man can bend these back IN
shape.
Why 10 il hard for me to start my car
when ! run out of gasoline and refill
the tank again?
Possibly the carburetor float sticks
against the side of the chamber, SO
that i, is difficult for the gasoline to
flow in. Another explanation is that
there is dirt in the fuel pipe and that
therefore the passage OF fuel is very
slow. with the result that it takes
some time for the chamber to become
filled. and If an attempt is made to
start before this time difficulty may
be experienced.
Can you tell me how to mend crack
in the crank case? Il 10 80 bad that
the oil leaks out in , short time.
You cannot mend this yourself IN
less it is very small. in which case
you might be able to patch 1t with a
piece of sheet steel metal and some
rivets. II the crack is Of any size 1t
Is best to have 1t welded. although II
the place Is so situated that 1t Is not
strained by the operation Of the motor
1t may be sufficient to solder It
What effect does the practice Of US
ing the motor a. . brake coming down
hill have on the mechanism Of IN au-
tomobile7
The use Of a motor as a brake Is
generally conceded to have q more or
less deleterious effect on the gears
The power through the gears Is re
versed, since the car Is now tending
to drive the motor. Thus instead Of
having the stepd0wn reduction we
have a step-up with consequently
more surface pressure on the teeth
and hence more abrasion.
Where 10 The best place to look for
knock7
All moving joints are susceptible to
knocks. Tracing through the trans
mission of power from the cylinder to
The rear axle. we find that at each
point Of engagement OF one or more
moving paris With other. parts there il
chance for knock- Starting with
the piston. II this Is suo loose. there
will be distinct siappim- sound 1t
can ouly he cured by the use Of an
diversified piston. Tie next point Is At
the wriS, pin. which might have u
knock due To !oosc:ieSS in the upper
connecting rnd. The fourth point Is IN
the main bearings iu the crankshaft.
fifth at the cunneSt.on between the
crankshaft and clutch. then In the uni
versal joints and the gear box bear
ings and between the teeth of the Diff
ferent gears Loose valve tappets.
timing gears. etc. are also fruitful
sources Of knocks
viii Il shorten re life Of . piston BY
drilling 10 tighten Il Or 10 there any
disadvantage in 80 doing?
Vns. can S9v;ef ehx, ,>.S>n,,.. VA ~vne
good results. Many rieiny 'ars use
such p!stons II will he better and
cheaper in the end tn get piStons Of
some light material. such a mag.
nahum
| Should the valve spring b . stiS one
under small compression Or . nimbie
spring under heavy compression 70 give
best results?
The stiffness of the spring will be
fond only by experiment As the pis-
ten descends 1t creates u vacuum In the
cylinder. thus allowing the pressure Of
the atmosphere to open the valve II
the piston suction il poor. then the
difference in pressure between the bot
tom and the top Of the valve will not
be so great. and hence the valve win
have tendency to remain shut How
ever. II piston has good suction the
valve will oi,en without difficulty. You
will hare to try your particular mo
tor and valves liz order to get the best
results.
Plsass explain the proper way -
svsshaulips ear.
In god repair shops and service Sta