SELVA MARINE Kingfish 25, Service Manual

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8
Example:
If (M3) is 28.30 mm and “P” is (+5), then
(T3) = 28.30 – 27.00 – (+5)/100 mm
= 28.30 – 27.00 – 0.05 mm
= 1.25 mm
If (M3) is 28.43 mm and “P” is (–3), then
(T3) = 28.43 – 27.00 – (–3)/100 mm
= 28.43 – 27.00 + 0.03 mm
= 1.46 mm
TIP:
“P” is the deviation of the lower case dimen-
sion from standard. The “P” mark
c
is
stamped on the anode mounting surface of
the lower case in 0.01 mm units. If the “P”
mark is unreadable, assume that “P” is zero
and measure the backlash when the unit is
assembled.
5. Select the pinion shims.
Example:
If (T3) is 1.25 mm, then the pinion shim is 1.3
mm.
If (T3) is 1.46 mm, then the pinion shim is 1.5
mm.
Selecting the forward gear shim
Select the forward gear shims using the mea-
surement(s) and calculation formula.
1.
Turn the taper roller bearing outer race
1
2 or 3 times to seat the rollers.
2. Measure the bearing height (M1) at 4
points, and then calculate the average.
3. Calculate the forward gear shim thick-
ness (T1).
Example:
If (M1) is 16.32 mm and “F” is (–3), then
(T1) = 17.50 + (–3)/100 – 16.32 mm
= 17.50 – 0.03 – 16.32 mm
= 1.15 mm
If (M1) is 16.25 mm and “F” is (+5), then
(T1) = 17.50 + (+5)/100 – 16.25 mm
= 17.50 + 0.05 – 16.25 mm
= 1.30 mm
Calculated number (T3) Shim
thickness
(mm)
More than Or less
1.10 1.20 1.2
1.20 1.30 1.3
1.30 1.40 1.4
1.40 1.50 1.5
1.50 1.60 1.6
1.60 1.70 0.7 + 1.0
1.70 1.83 0.7 + 1.1
Available shim thicknesses:
0.7, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6 mm
Shimming plate
2
: 90890-06701
Calculation formula:
Forward gear shim thickness (T1) =
17.50 + F/100 – M1
M1
1
2
2
1
a
Shimming