146
Crankcase
1 double-end stud（B） 2 pin bush 3 double-end stud (A) 4 left box assembly 5 forward-bouncing joint 6
tube union 7distance sleeve 8 crankshaft seal ring 9starter bearing 10drain belt 11gasket 12 oil seal 17×30×5
13 shock absorbing bushing
14 hex flange bolt 15gasket 16 locating pin10×20 17 hex flange belt 18 deep groove
ball bearing 19 rolling bearing 20 bearing 21 crankcase spacer 22 right box assembly 23 hex flange belt 24
stationary spring s shaft 25 plug 26 connecting rod with plunge
Note: The crankcase is thin-
section casting thus shall not
suffer impact during operation
which may cause deformation
or fracture.
All components must be
cleaned and blown with high-
pressure gas before test.
Lubricant in the crankcase
should be drained out before
operation.
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