Yamaha EK40G, Service Manual

Page: 85 / 200

6H95G11 5-28
9
8
7
6
5
4
3
2
1
Crankcase
2. Apply grease to new oil seals, then install
them into the oil seal housing.
3. Install the circlip
5
, apply grease to new
O-rings
6
, and then install them.
Disassembling the piston
1. Remove the clips with pliers, and then
remove the piston pin.
2. Separate the piston from the connecting
rod.
3. Remove the bearing and washers at the
connecting rod small end.
4. Remove the top ring and 2nd piston ring.
2. Calculate the taper limit. Replace or
rebore the cylinder block if above specifi-
cation.
3. Calculate the out-of-round limit. Replace
or rebore the cylinder block if above
specification.
Disassembling the oil seal housing
1. Remove the O-ring and oil seals.
Checking the oil seal housing
1. Check the oil seal housing for cracks,
damage, or corrosion. Replace if neces-
sary.
Assembling the oil seal housing
1. Apply grease to new oil seals, then install
them into the oil seal housing.
6F650390
1
2
Taper limit:
D
1
— D
5
(direction
d
)
D
2
— D
6
(direction
e
)
0.08 mm (0.0032 in)
Out of round limit:
D
2
— D
1
(direction
a
)
D
6
— D
5
(direction
c
)
0.05 mm (0.0020 in)
6F650380
Needle bearing attachment
1
:
90890-06613
Driver rod L3
2
:90890-06652
Needle bearing attachment
3
:
90890-06631
Driver rod LS
4
:90890-06606
6F650400
3
4
5
6
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