Yamaha F30A 2018, Руководство по обслуживанию

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8-29
S himming
k. Turn the drive shaft slowly clockwise and
counterclockwise, and then measure the
backlash between where the drive shaft
stops in each direction.
TIP:
• Do not turn the drive shaft using too much
force. Otherwise, the forward gear will turn,
leading to incorrect measurements.
• A knocking sound may be heard when the
drive shaft is rotated, but this is the sound of
the pinion contacting the reverse gear and
does not affect the backlash measurement.
l. Turn the drive shaft 180

clockwise, and
then measure the backlash again.
TIP:
• Measure the backlash at 4 points: “a”, “b”, “c”,
and “d”, turning the drive shaft 180

clockwise
after each measurement.
• Write down the measurement data in the
shimming check sheet.
m. Determine the backlash average, and then
round down the average to 2 decimal plac-
es.
Example:
(mm)
n. Check that the forward gear backlash av-
erage is within specification.
TIP:
Adjust the shim thicknesses if the forward gear
backlash is out of specification.
o. Remove the special service tools from the
propeller shaft.
Magnet base plate “1”
90890-07003
Backlash adjustment plate “1”
YB-07003
Dial gauge set “2”
90890-03238
Dial indicator gauge “2”
YU-03097
Magnet base B “3”
90890-06844
Magnetic base stand “3”
YU-A8438
Pinion height gauge “4”
90890-06668
Pinion height gauge “4”
YB-06668
Measurement point “a” 0.30
Measurement point “b” 0.36
Measurement point “c” 0.34
Measurement point “d” 0.33
Average 0.3325
Round-down average 0.33
a
b
c
d