Disassembly Of Crank Shaft; Inspection Of Crank Shaft - TOHATSU MD 70-90C2 Service Manual

21) Disassembly of Crank Shaft

1. Remove main bearing (Lower).
Remove "C" ring 1 and pull out spacer 2.
Remove main bearing (lower) 3 by using universal puller
plate and universal puller.
Universal Puller Plate 4 :
3AC-99750-0
Puller 5 : Commercially Available Item
Protecting Plate 6 :

22) Inspection of Crank Shaft

1. Visually check crank shaft ass'y upper and lower end
bearings for flaws, wear and other damages. Replace
crank shaft ass'y if necessary.
Specified Value a:
#1, Top ø36.0 mm (1.4173 in)
#1~2、between ＃2~3 ø35.0 mm (1.3780 in)
#3, Under ø40.0 mm (1.574 in)
2. · Check if main bearing rotates smoothly. Replace crank
shaft ass'y if necessary.
· Measure crank shaft deflection. Replace crank shaft if
the deflection is over the specified value.
Dial Gauge 1 : Commercially Available Item
V Block 2 : Commercially Available Item
Crank Shaft Deflection Limit :
0.05 mm (0.0020 in)
TLDI 75/90C2 2010
3
2
1
4
5
6
a
5
a
1
2
5-35