SELVA MARINE Blue Whale 250 EFI, Service Manual

Page: 215 / 377

6P23H11
6-24
1
2
3
4
5
6
7
8
9
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 is unreadable, assume that “ P ” is zero
and check the backlash when the unit is
assembled.
Example:
If
“ M3 ” is 50.75 mm and “ M4 ” is 30.57 mm
and “ P ” is (+2), then
T3 = 82.00 + (+2)/100 – 50.75 – 30.57 mm
= 82.00 + 0.02 – 50.75 – 30.57 mm
= 0.70 mm
If “ M3 ” is 50.70 mm and “ M4 ” is 30.53 mm
and “ P ” is ( – 3), then
T3 = 82.00 + ( – 3)/100 – 50.70 – 30.53 mm
= 82.00 – 0.03 – 50.70 – 30.53 mm
= 0.74 mm
6. Select the pinion shim(s) (T3) as follows.
Example:
If
“ T3 ” is 0.70 mm, then the pinion shim is
0.68 mm.
If
“ T3 ” is 0.74 mm, then the pinion shim is
0.72 mm.
Selecting the forward gear shim
1. Turn the taper roller bearing outer race
1
2 or 3 times to seat the rollers, and
then measure the bearing height (M1) 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 3 points
to find the height average.
Calculation formula:
Pinion shim thickness (T3) =
82.00 + P/100
– M3 – M4
Calculated numeral
at 1/100 place
Rounded numeral
1, 2 0
3, 4, 5 2
6, 7, 8 5
9, 10 8
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
Shimming plate
2
: 90890-06701
Digital caliper
3
: 90890-06704
Shimming (regular rotation model)