MASSEY FERGUSON MF 14 - Page 7

lnstall
connecting
rod in
engine
with notch
on rod
and
cap toward
flywheel
side of
engine
as shown
in
Fig. 6.
Tighten
retaining bolts
to 300
in.-lbs.
torque.
CRANKSHAFT AND
BALANCE
GEARS
Two
balance
gears
are
driven off the crank-
shaft gear
in
the
direction
opposite to crankshaft
rotation.
The two
gears
run
on
needle
bearings
on stub
shafts.
When
the crankshaft
is
reinstalled, care
must
be
exercised
to
make sure
that the
gears
are
properly
timed to
the crankshaft.
See Figs.
10and'11.
Fig.
10
-
Engine Balance
System
Components
.003"
to .020"
end-play
of crankshaft.
CAMSHAFT
The camshaft
contains
an
automatic com-
pression
release
which
raises the
exhaust
valve
slightly
during
cranking
and aids in starting.
Fly-
weight
action
disengages
this
release after
a
speed
of 650
rpm is
reached.
The camshaft
ro-
tates
on
a
pin
which is
held securely
in
the
engine block.
Shims
must be
used
to
obtain an
end-play
of
.005"-.01
0".
VALVES,
SEATS,
SPRINGS AND
GU
IDES
To
replace
valve
guide,
drive down and
carefully
break
off
protruding
end
until
guide
can
be removed.
Press
new
guide
into
block
until
upper end
of
guide
is
1-15/32"
from top of cyl-
inder
block.
Check
rotator
caps
to
be
sure
they will
ro-
tate before
installing
valves
and
retainers.
Valve seat
inserts
are
available
for both
valves.
When
servicing
the valve
seats
the
seat-
ing surfaces
should
be held
as close
as
possible
to
1/32"
wide.
The seats
should
never
be more
than 1/16"
wide.
Both
seats
should
be
ground
to a 45'
angle.
After
the
valves
and seats
are
refaced,
they should
be lapped
in
with a
fine
grade
of valve
grinding
compound.
After
valves
are
installed,
adjust
tappet
clearance
to
-
in-
take
.008"-.010"
and
exhaust
.01
7"-.019".
GOVERNOR
The
governor
is
a mechanical
type with
centrifugal
flyweights
and
is
mounted within
the
crankcase
and
driven
off the camshaft gear.
Engine
governed
speed
is
variable
as de-
termined
by the
throttle
control lever.
Before
servicing
the
governor
gear
assem-
bly, the crankshaft,
balance
gears
and camshaft
will have
to
be
removed.
Governor linkage
is
adjusted
at the
factory
and
further
adjustment
should
not
be
necessary
unless the linkage
has
been
disturbed.
Readjustment
may
be
indicated
if
engine
speed
surges
with change
of
load
or
if
speed
drops
considerably
when
a load is
applied.
To
adjust governor
linkage,
stop
engine,
ref er to
Fig. 12,
and
proceed
as follows:
'1.
Loosen
clamp
nut
holding
governor
arm
to cross
shaft.
2.
Rotate
cross
shaft
counterclockwise
as
far as
possible.
3. Pull governor
arm
all
the way
away
from
carburetor
and
retighten
clamp
nut.
Normal location
of spring
is
third hole
in
governor
arm
and
second
hole in
control
arm as
shown
in
Fig.
12. Also
refer
to Fig.
9.
Fig. 11
-
Timing
Marks
Used lor lnstallation
The
crankshaft
and
gear
are of one
piece.
lf gear
is
worn
or
damaged
the crankshaft
should
be
replaced.
lf
crankpin
is slightly
scored it
can
be
cleaned
up
by
using
crocus
cloth
soaked
in
oil,
then
use
a
.002"
undersize
rod.
lf
scored
more
than
.002" it should
be
reground to
.0.10"
or
.020"
or replaced.
BEARING
PLATE
The
bearing
plate
contains
one crankshaft
bearing
and oil seal.
lt is
retained
to the
cylinder
block
with 4
capscrews
and is
sealed with
shim
gaskets.
The
gaskets
control
crankshaft
end-
play.
Remove
or add shim gaskets
to
obtain
PRIMARY
TIMING MARK
(BALANCE
GEAR)
STANDARD
TIMING
MARK
(CRANKST]AFT
)
SECONDARY
TIMING MARK
(BALANCE
GEAR)
SECONDARY
TIMING MARK
(cRANKSHAFT)
tr