MASSEY FERGUSON MF 14 - Page 12

Before
any servicing
is
done to the trans-
mission
it
is
suggested
that
a
pressure
check
be
made
as
follows:
1.
Remove
covers
over
drive shaft.
2.
Remove plug
at top
of transmission
pump
housi
ng.
3. lnstall
a 1000
psi
gauge
as shown in
Fig.
Fig.21
-
Checking Charging Pump Pressure
4.
Start
engine and
observe
reading
on
gauge.
.
5.
The
reading
on
gauge
should
be
70-150
pst.
6.
lf
the
pressure
is
not within
this
range,
check
pump
charge
relief valve located
at right-
hand side
of
pump
housing.
7.
Shims
are
used to regulate
pressure
-
add shims
to
increase pressure,
remove
to de-
crease.
Before
disassembling
the
transmission,
check
and
mark charging
pump
housing
and
motor
housing positions.
These
two housings
are
directional
according
to
pump
shaft
rotation.
Fig.
22
shows
a view
of the charging
pump
housing
correctly positioned.
lf
the
motor housing
is
accidentally
re-
versed,
the
tractor
will
go
forward
when
the
Hydra-Speed
Lever is
in
the
reverse
position
or
back
up when
in
forward
position.
1.
Separate
transmission
and
rear
axle
assembly.
2.
Refer
to
Fig. 22
and
remove
bolts secur-
ing
the
charging pump
housing
and
remove
the
housing.
3.
Remove gerotor
assembly
and
drive
pin
as shown
in
Fig. 23.
4.
Remove
the implement
relief valve
spring
and shims
from
upper
left
side
of
the
pump
housing.
See
Fig.
24.
5.
Remove
the
charge
relief
valve spring
and shims
from
the
upper right side
of the
pump
housing.
See Fig.
25.
c!llrEli
StcTltla
MO?OR
aofsrNe
ctlrR{]1NC
l:r".ti4F
rlous1tlc
Fig.22
-
Fronl
View
of
Transmission
.@b
Y
t
\-.-"-/
TP
Fig. 23
-
Charging
Pump
Disassembled
Fig.24
-
lmplement
Reliel Valve
Removed
d\::;l:'
\\
'$
]!1(]TOR C}:NTCR PUMP
IIOUSJNG
SECTICN
HOUSlNG
Fig. 25
-
Charge
Reliel
Valve
Removed
-10-