Mazda RX-7 - Stationary Gears (Front and Rear)

ENGINE
Note:
a) Pay
particular
attention
to
the spark
plug
side of the
side housing;
this is
the
combustion
area
and
is
usually the location
of the
greatest
wear.
b) lf excessive
wear
rates
are
measured
over
a
relatively
short
period
of time, for in-
stance
0.1 mm
after 2000
miles
or
less,
it may
be
an
indication
of dirt or
other
contaminants
in the
engine
and the
intake
air filtering
system should
be checked.
B.
Stationary
gears
(front
and
rear).
1.
Checks.
Visually,
check for
any indications
of damage
or cracking
on the
teeth.
2. Measurements.
(1)
Inside diameter
of bearing.
a) With
an
inside
micrometer,
measure
the four
points
as
shown
in
Figures
3
and 4.
Figure
3
a.tnJ
l::l.j'i::
..'.-'-',!.{r...i,1.:l{_.. ir.r,.',ji
-...{'.-i.
Figure 4
lf the
oil
clearance is incorrect or
the surface
is flaking,
the bearing
must
be
replaced.
(2)
Oil clearance calculation.
Determine the oil clearance by
the following formula:
dia.
of
journal)
Both
the
A and B
dimensions
must
be in
the
range
of 0.05-
0.08
mm.
3.
Bearing
replacement.
(1)
Bearing
removal.
To
remove
the bearing,
use a
press
and the
bearing
puller,
part
number
49
0813 235.
Re-
move
the
adaptor ring
from the
puller,
and
press
from the
gear
side
as shown in Figure
5.
(2)
Bearing installation.
Pay
particularly
close atten-
tion to
the
positioning
of
the
clinch lock
section of the bear-
Install the
bearing with this
procedure.
a) Attach the
adaptor
ring
to
the
press
tool.
b) Make certain
the clinch lock
is
in the
proper position.
c) Press the
bearing all
the
way down
until the adaptor
ring
contacts the
gear
flange,
as
shown
in Figure
6.
A
-
(Min.
inside
dia.)
dia. of
journal)
B
=
(Max.
inside
dia.)
-
(Max.
-
(Min.
Figure
5
Figure
6