TOHATSU MD 30B2 Service Manual page 220

Lower Unit
5. Attach backlash measuring tool clamp w to drive shaft.
6. Turn drive shaft 9 clockwise / counterclockwise slowly
while pulling it up, and read change of dial gauge e
indication.
· When measuring, contact dial gauge tip to inside
of V groove located in the clamp ass'y.
· Attach backlash measuring tool clamp w onto
drive shaft so that the place near as possible to
pump case.
· When pull up drive shaft, make sure to hold drive
shaft that the place near as pump case.
Backlash Measuring Tool Clamp w :
P/N. 3B7-72720-0
Dial Gauge e :
Commercially Available Item
Magnetic Stand r :
Commercially Available Item
7. Select proper thickness of shim based on the backlash
measured with dial gauge and on the table shown.
· Confirm dial gauge reading and adjust backlash
by using thickness of shim selected.
· Measure backlash several times while changing
gear teeth contact position.
· When measuring backlash, make drive shaft
pulling up force equal among the measurements.
· This work can be made easier when the opening
of gear case of propeller shaft side is faced
upward and fixed horizontally with a holder.
D30/40/50
Proper Backlash :
0.31 - 0.62 mm (0.0122 - 0.0244 in)
6-42
r
9
WD50
Proper Backlash :
0.29 - 0.58 mm (0.0114 - 0.0228 in)
e
w
TLD D30/40/50B2 2013