l
l
COA1PRESSIOh'
RING
FITTING
CY1,INDER
BORING
When cyliiiders are iiiore tlian
.OOC>"
out of triie
it is best to rebore tlie cyliiiclers. Tlie instriictions
furnislied by tlie maniifacturer of tlie eqiiipnient
should
be carefiilly followed.
After the cylinder lias heen rehored within
,002''
of the size desired it slioiild be finished or polistied
witli a csliiider Iioiie. Do iiot use a piston as a
hone. In
nperating, the Iione
is
placed in the cylin-
der bore anrl ruil iip anrl down tlie full lengtti of tlie
cylincler wall. Tliis procedure should be followed
iintil tlie pislnri r:nii
I)c
fnrcecl tliroiigli tlie hores
with a
.00:3"
feeler gauge
x"
wide on tlie tlirust
side
nriil
sliow a
11~111
on
tlie feeler gaitge of Tive
to ten poiitids. See Fig.
23.
FIG.
28-PISTON
PIN
FLTTING
OIL
PUMP
ASSEMBLY
The oil pump is the planetary gear type.
It
consists of two spur gears eiiclosed in
a
olie piece
tiousing.
It
is provided with a relief valoe to
control maximum oil pressure at al1 speeds. In
operation the oil is drawn from the crankcase
tliroitgh tlie floating »i1 intake, Fig.
33.
Tlie
oil then passes through a drilled passage in crank-
case to tlie oil pump from
wliich it p;isses to the
oil distribution system ar drilled passages in crank-
case to
cranlcshaft and camsliaft bearirigs.
FIG.
29-CONNECTIKG
Rol>
ANI)
I'ISTON
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