Yamaha 115B, Руководство по обслуживанию

Страница: 123 / 261

61U5H11 5-42
9
8
7
6
5
4
3
2
1
Crankcase
Assembling the piston and connect-
ing rod assembly
1. Assemble the pistons
1
, connecting
rods
2
, needle bearings
3
, washers
4
,
piston pins 5 , and new piston pin clips
6
.
NOTE:
9
Face the embossed “YAMAHA” mark
a
on
the connecting rod in the same direction as
the “UP” mark
b
on the piston.
9
Use the small end bearing installer
7
to
install the needle bearings.
9
Always use new piston pin clips.
9
Be sure to align the piston pin clip end with
the piston pin slot
c
.
2. Install the 2nd piston ring
8
and top ring
9
onto the pistons.
6G450670
9
8
b
1
2
3
4
5
c
6
6
6
4
a
61U50720
3
7
c C
Do not scratch the pistons or break the
piston rings.
NOTE:
Install the piston rings with the recess for the
locating pin facing up toward the piston
crown.
Assembling the power unit
1. Set the crankshaft in the cylinder block.
NOTE:
9
Fit dowels
1
on the cylinder block into the
dowel holes 2 in the main bearings.
9
Align the seal ring end gaps
a
with the
crankcase center line.
61U50440
a
2
1
Small end bearing installer
7
:
90890-06528
61U5H11_05_1 06.2.10 17:22 Page 45