SELVA MARINE Dorado 50 EFI, Service Manual

Page: 192 / 303

LOWR
Lower unit
6-49
6C13G11
4. Calculate the pinion shim thickness (T3)
as shown in the examples below.
NOTE:
“ P ” is the deviation of the lower case dimen-
sion from standard. The “ P ” mark
a
is
stamped on the trim tab mounting surface of
the lower case in 0.01 mm units. If the
“ P ”
mark unreadable, assume that “ P ” is zero
and check the backlash when the unit is
assembled.
Example:
If
“ M ” is “ 32.10 mm ” and “ P ” is “ +5 ” , then
T3 = 32.10 – 31.50 – (+5)/100 mm
= 0.60 – 0.05 mm = 0.55 mm
If “ M ” is “ 32.10 mm ” and “ P ” is “– 5 ” , then
T3 = 32.10 – 31.50 – ( – 5)/100 mm
= 0.60 + 0.05 mm = 0.65 mm
5. Select the pinion shim(s) (T3) as follows.
Example:
If
“ T3 ” is “ 0.55 mm ” , then the pinion shim is
0.58 mm.
If
“ T3 ” is “ 0.64 mm ” , then the pinion shim is
0.65 mm.
Selecting the forward gear shims
1. Turn the taper roller bearing outer race
1
two or three times to seat the rollers,
and then measure the bearing height (M)
as shown.
NOTE:
• Select the shim thickness (T1) by using the
specified measurement(s) and the calcula-
tion formula.
• Measure the bearing outer race at three
points to find the height average.
2. Calculate the forward gear shim thick-
ness (T1) as shown in the examples
below.
Calculation formula:
Pinion shim thickness (T3) =
M
– 31.50 mm – P/100
Calculated numeral
at 1/100 place
Rounded numeral
0, 1 2
2, 3, 4 5
5, 6, 7 8
8, 9 10
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
S68S6250
P
R
+5
F +5
a
Shimming plate
2
: 90890-06701
Digital caliper
3
: 90890-06704