Yamaha F50D Servise Manual - page 214
Lower unit
8-15
LOWR
Do not reuse the original bearing, replace
it with a new one.
1.
Heat the installation area of the taper
roller bearing outer race in the lower
case with a gas torch, and then install the
original shim(s)
1
and a new taper roller
bearing outer race
2
.
NOTICE:
When
heating the lower case, heat the entire
installation area evenly. Otherwise,
the paint on the lower case could be
burned.
TIP:
Do not reuse a shim if it is any deformed or
scratched.
2.
While holding the special service tool
3
,
strike the tool to check that the taper
roller bearing outer race is installed prop-
erly. If a high-pitched metallic sound is
produced when the special service tool is
struck, the outer race is installed prop-
erly.
3.
Install a new needle bearing into the
lower case to the specified depth.
TIP:
9
Install a new needle bearing with the manu-
facture identification mark
b
facing
upward.
9
When using the driver rod, do not strike the
special service tool in a manner that will
force the stopper
c
out of place.
1
2
Driver rod LL
3
: 90890-06605
Bearing outer race attachment
4
:
90890-06622
Driver rod SL
5
: 90890-06602
Needle bearing attachment
6
:
90890-06614
Bearing depth plate
7
: 90890-06603
Installation depth
a
:
182.5–183.0 mm (7.19–7.20 in)
3
4
3
4
5
6
7
c
a
6
5
b