MASSEY FERGUSON MF 14 - Page 50

MASSEY-FERG
USON
GROUP
O
- SECTION
V
- PART 3
ENGINE OYERHAUI.
PROCEDURES
CRANKSHAFT
GEAR
PRESS
FIT
POSITTON
WITH
CHAI}TFERED
TOOTH
AWAY
FROI[
COUNTERWEIG
AGAINST
SHOULDER
REMOVE
GEAR
SUPPORT
CRANKSHAFT
BY
PI.ACING
AT
COUNTERWEIGHT
PULLER
JAW
WHEN
PRESSING ON
T'NDER
GEAR
GEAR
CHAI\{FER
AWAY
FROM
COUNTER-
WEIGHT
Fie. l8
END PLAY
SEE SPECIFICATIONS
CYLINDER
COVER
lrAil
SI'IIM
GASKET
''B''
STEEL
WASHER
IF REQUi,RED
BEARING
CUP
lrDil
CRAN KSHAFT
1.
Note the charnfer tooth
on the cra.nksha-ft
gear
in
Fig. 17.
This tooth is used
as a
refer-
ence
mark to be matched
with the timing
mark
on
the
camsha"ft.
Refer
to
Step
#2
under
the
heading
"Carnsha.ft".
The crankshaft
gear
is replaceable.
Remove
gear
with
a conventional
puller
a-fter
the roller
bearing
has been removed.
The
gear
and
the
bearing
may be
removed
simultaneously but
much difficulty
rnay
be encountered.
Roller bearing
must be heated
before it
is
installed.
2.
Use an arbor
press
and
a
suitable
driver
to
press
gear
into
position.
Keyway in
gear
is
to
fit
over
gear pin
and
beveled tooth
must
face
PTO end
of crankshaft.
(See
Fig. 18.)
Gear
must fit tighUy
against shoulder.
3.
Crankpins should
be examined for
wear,
scoring
ald out-of
-round.
If
any
of these
con-
ditions
are noted, replace
the
cranksha-ft.
Re-
fer
to
"fuecifications"
Section within this
Manual.
Lubricate
the
crankpin before
attaching
the
connecting
rod.
This wiil
prevent
damage
dur-
ing
the
initial run-in
after
reassembly.
CRANKSHAFT
BEARINGS
1.
The
correct
assembly of the crankshaft
bearings
is
illustrated
in
Fig.
19.
The bear-
Printed
in
U.S.A,
Fie.
l9
ing
at
the fiywheel
end
of the
crankshaft seats
in an adjustable
bearing
cup
("C")
in the
cylin-
der.
The bearing
cup
("D")
supporting the
PTO
end
of the
crankshaJt
is
a
press
fit in
the cyl-
inder
cover.
Examine the
bearing
for wear,
pitting,
rust,
alignment
and
uneven
wear of the rollers.
2.
Remove
the bearing
by securing
a
bear-
ing
separator between
the
bearing
a:rd the
crankshaft
gear.
Secure
jaws
of
puller
onto
separator
as
shown
in
Fig. 20
and
draw
bearing
off shaJt.
3.
Once
a
bearing
has been
removed,
it
MUST BE DESTROYED
as
it becomes
distorted
and damaged
while
being removed.
The
new
bearing
may be
installed
onto the
crankshaJt
by
using
pressure
or heat.
(Heating
the bear-
ing
is the
prefemed
method.
)