The Oskaloosa herald. (Oskaloosa, Mahaska County, Iowa) 1885-1919, 1915-09-09

sen:tioatina rear axle2
In the senriaoating 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
ficulty 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
ter2 II 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, minute, but it
cannot be expected that the pressure
will stay there indefinitely when the
piston is stopped on dead center. From
the way your question is worded it
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 it there for q
few moments at least. If. however
! we have misunderstood you and the
fact actually IS that when you turn
| 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 1t 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
! pistOus and rings remove the exhaust
! valve and note whether it is carbon
+ lied or pitted. If 50 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 seat and leakage will occur.
! IL the exhaust valve is found to be in
| good condition examine the inlet valve
How 10 canvas strip used to pull a
car out Of the mud2
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 II,
| and the latter Is wound upon the tire,
the car coming forward at the same
! time.
would like to know what causes
dull knock in my engine running slowly
when idle. With both throttles re-
tarded, the valves in good shape and
the connecting rods tight this knock
seems to be in the fore part of the en-
! CINE.
The knock is due to some loose part
which must be found by process Of
elimination: Probably you will find
this knock by examining the main
J bearings for looseness. the flywheel
connection and the crank shaft, which
may have become iattened. If the
! pistOns are worn 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-
! gines should denatured alcohol be used
while engine is hot or eold2 How much
! to each cylinder, and how long should
IL remain in cylinders? .,..
Apply the alcohol when the motor is
hot for the reason that the action of
the alcohol is merely to dissolve the
gummed oil which binds the particles
of carbon together into hard, solid
mass. and when the alcohol is hot 1t
dissolves the oil more readily. The
cylinder should be filled with alcohol
so that II will come into contact with
every part or the carbon. 1t is best to
do one cylinder at time. Bring the
piston to top dead center on the COM
, preston stroke. as the valves are then
closed FIJI the cylinder with alcohol
and allow It TO stand until the carbon
is softened How long this will take
depends on how hard the carbon Is.
One hour may be sufficient and then.
again. 1t may be necessary 70 allow It
to stand overnight or possibly twenty
four honrs. ~ z.
A Il .-s = i