Determination Of Forward Gear Backlash - TOHATSU MFS 9.9 Owner's Manual

Lower Unit
32) Determination of Forward (A) Gear
Backlash
Backlash Measuring Tool Kit :
P/N. 3C8-72234-1
Backlash Measuring Tool Shaft 1 :
P/N. 345-72723-0
O-Ring 2 :
P/N. 332-60002-0
Measuring Tool Set Piece 3 :
P/N. 3BJ-72245-0
Backlash Measuring Tool Plate 4 :
P/N. 3A3-72724-0
Cone Disk Spring 5 :
P/N. 3B7-72734-0
Nut M12P1.5 w :
P/N. 930191-1000
Clamp A 6 :
P/N. 3B7-72720-0
Clamp B 7 :
P/N. 3B7-72720-0
Dial Gauge Plate :
P/N. 3B7-72729-0
8 Pump Case (Lower)
9 Pinion (B) Gear
1. Perform measurement of backlash between forward (A) gear
and pinion (B) gear with propeller shaft housing, propeller
shaft and reverse (C) gear removed from gear case.
Put conical disk springs 5 on the groove side of shaft 1
getting their concave sides face to face, put O-ring 2 in the
groove, and then, collar 3. Then, screw plate 4 fully onto
shaft 1. Put collar 3 side of shaft 1 into bearing of forward
(A) gear 0, and secure plate 4 to gear case with bolts.
Put two nuts (M10) w on the aft-end of shaft 1, and screw
the nuts onto the shaft with wrench. When drive shaft q
starts to rotate as the nuts are turned, screw the nuts 45
degrees additionally. Keep shaft 1 in this state.
2. Secure clamps A6 and B7 with bolt. Preload the bearing
by turning drive shaft q several time while pulling it up
toward direction shown by arrow to adapt it. Use dial gauge
to read backlash at location of notch groove a.
Proper Backlash Obtained from Gauge Reading :
0.60 - 1.00 mm (0.0236 - 0.0393 in)
Sizes of Adjusting Shims :
For Pinion (B) Side : 0.1, 0.15, 0.3, 0.5mm
6-24
1
4
w
1
a
e
9
w
1
4
a
90˚
6
3
2
5
5 3
2
6&7
8
q
2
3
0
q
7
4st 9.9/15/20 2008