Bevel Gear B Height Measurement And Shim Selection - TOHATSU MFS 25D Service Manual

32) Bevel Gear B Height Measurement
and Shim Selection
When the gear case, drive shaft, or oil seal
housing assy is replaced, measure the
height of bevel gear B and the backlash
between the gears and adjust the shim.
1. When measuring the backlash of each gear, first measure
the height of the bevel gear B of the drive shaft, then
adjust the value accordingly.
Following "Assembly of Bevel Gear B 1 to 3" and
"Installation of Pump Case 1 to 3" in Chapter 6, install the
parts up to the pump case (lower) 1.
Remove the bevel gear assy A.
2. To make it easy to adjust the shim, face the opening of the
gear case on the propeller shaft side upward and fix the
case horizontally with a holder.
Insert a shimming gauge 2 into the gear case, and
measure the gap a between the shimming gauge and the
bevel gear B 3 .
• The shimming gauge 2 should contact the
taper surface of the outer race 4 of the
taper roller bearing.
• Pull up the drive shaft to eliminate the
backlash during measurement.
Measure the gap between the shimming gauge
2 and the edge of the bevel gear B with a
thickness gauge.
Shimming Gauge 2 :
P/N. 346-72250-0
Thickness Gauge:
P/N. 353-72251-1
4st 25/30 2022
CAUTION
CAUTION
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