Measurement Of Pinion (B) Gear Height And Shim Selection - TOHATSU MD 70-90C2 Service Manual

Lower Unit
30) Measurement of Pinion (B) Gear
Height and Shim Selection
When gear case, drive shaft or pump case
(lower) is replaced, measure pinion (B) bear
height and back lash between gears, and
perform shim adjustment.
1. Before measuring back lash of each gear, measure drive
shaft pinion (B) gear height and adjust the height to proper
value if necessary.
In accordance with procedure described in "Assembly of
Lower Unit" steps 2 to 7 on Chapter 6, install the parts up
to pump case 1, and secure it by using M8 bolt (L=35mm)
and flat washer 2.
Remove forward (A) gear before beginning the
work.
M8 Bolt (L=35mm) + Flat Washer 2 :
13N · m (9.0 lb · ft) [1.3kgf · m]
2. 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.
Put a shimming gauge 3 into gear case, and measure gap
a between shimming gauge 3 and pinion (B) gear 4.
· Contact shimming gauge 3 with taper
roller bearing 1 outer race tapered face.
· When measuring the gap, fully pull up
drive shaft to eliminate the play.
Thickness gauge measures the gap between
shimming gauge 3 and pinion (B) gear end.
Shimming Gauge 3 :
P/N. 3B7-72250-0
Thickness Gauge :
P/N. 353-72251-0
6-32
CAUTION
CAUTION
2
2
b
4
a
1
3
5
TLDI 75/90C2 2010