The Brookings register. [volume] (Brookings, Brookings County, S.D.) 1903-1971, 1915-09-02

" vi iNH 'plllIIIiu 'l'ti dllol dlltl III
switch has been opened, as the case
may be. The broken wire should be
easily found by inspection unless. as
sometimes happens, the breakage oc-
ours inside the insulation.
se~m:tloating rear axle?
In the s%emidoating rear axle the
shafts must support the weight Of
body, frame, etc; take torsional stress
es and turn the rear wheels. The
shafts cannot be removed without diff
fculty and then only when the wheels
are removed and the housing lacked
up.
Will you please tell me whether a
cylinder should leak compression past
the rings when stopped on dead cen
tor? If il should not leak, how do you
remedy this?
The rings should be tight enough so
that no appreciable loss Of pressure
will occur for, say. a minute, but 1t
cannot be expected that the pressure
VIII Stuy lhtIe luucIlIlltly WICh tliC
piston is stopped IN dead center. From
the way your question is worded 1t
seems that you have turned the motor
over until one Of the pistons has
reached the end Of the compression
stroke and that you left 1t there for a
few moments Mt least. If, however,
We have misunderstood you and the
R,AA slIr a.. ALaA .,E-.x 800, 1880.
the motor over slowly without stop
ping the pressure decreases then you
have a leak. 1t may not be the fault
Of the rings. however, but due to the
valves. If the trouble Is due to leak
ing rings they must be replaced. and If
the pistons and cylinders are very
badly worn it may be necessary to bore
out the cylinders and fit larger rings.
Before going to the trouble of tearing
down the motor and examining the
pistons and rings remove the exhaust
valve and note whether 1t Is carbon
lied or pitted. If so 1t must be ground.
Also note whether there Is any clear
ance between the valve stem and the
push rod. There should be sufficient
space TO insert a piece of writing pa
per, and If there is not the push rod
must be adjusted by loosening the lock
nut, which is the lower one. and then
turning the upper nut to the right. If
there Is no clearance the valve will be
held Off its seal and leakage will occur.
good condition examine the inlet valve.
How 10 a canvas strip used to pull .
car out of tho mud7
The canvas strip is supplied with
cords at either end and is tied to a
stake at the front and the rear tied
around the tire. When the wheel starts
to slip 1t carries the canvas with 1t,
and the latter is wound upon the tire,
the cal coming forward at the same
time.
would like to know what causes q
dull knock in my engine running slowly
whom idle. With both throttles re-.
tarded, the valves in good shape and
the connecting rods tight this knock
seems to be in tho fore part Of the en-
CINE.
The knock IL due to some loose part,
which must be found by process Of
elimination. Probably you will find
this knock by examining the main
bearings for ~looseness, the fywheel
connection and the crank shaft, which
may have become flattened. II the
pistons are worm SO that they have be-
come loose a knock Of this kind may
also be given by the slapping of the
pistons against the cylinder walls.
In removing carbon from gasoline en-.
Qines should denatured alcohol be used
while engine 10 hot or cold7 How much
to each cylinder, and how long should
Il remain in eyIindsrsf
Apply the alcohol when the motor Is
hot for the reason that the action Of
the alcohol Is merely to dissolve the
gumwed oil which binds the particles
Of carbon together into a hard, solid
mass. and when the alcohol Is hot It
dissolves the oil more readily. The
cylinder should be filled with alcohol
so that 1t will come into contact with
every part of the carbon. 1t is best to
do one cylinder at a time. Bring the
piston to top dead center on the COM
preston stroke. as the valves are then
closed. Fill the cylinder with alcohol
and allow It to stand until the carbon
h softened- How long this will take
depends on how hard the carbon h.
One hour may be sufficient and then,
again. 1t may be necessary to allow e
b stand overnight o. possibly twenty
four hours