Yamaha MTN850-A 2017, Руководство по обслуживанию

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CRANKSHAFT AND BALANCER SHAFT
5-75
e. Install the balancer shaft journal lower bear-
ings “1” into the lower crankcase and assem-
ble the crankcase halves.
TIP
•
Align the projections “a” of the balancer shaft
journal lower bearings with the notches “b” in
the crankcase.
• Do not move the balancer shaft until the clear-
ance measurement has been completed.
f. Tighten the bolts to specification in the tight-
ening sequence cast on the crankcase. Refer
to “CRANKCASE” on page 5-57.
g. Remove the lower crankcase and the balanc-
er shaft journal lower bearings.
h. Measure the compressed Plastigauge®
width “a” on each balancer shaft journal. If the
balancer shaft-journal-to-balancer shaft-jour-
nal-bearing clearance is out of specification,
select replacement balancer shaft journal
bearings.
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4. Select:
• Balancer shaft journal bearing (J
1
–J
2
)
TIP
•
The numbers “A” stamped into the balancer
shaft web and the numbers “B” stamped into
the lower crankcase are used to determine the
replacement balancer shaft journal bearing siz-
es.
• “J
1
”–“J
2
” refer to the bearings shown in the bal-
ancer shaft and lower crankcase illustration.
For example, if the crankcase “J
1
” and bal-
ancer shaft web “J
1
” numbers are 5 and 2 re-
spectively, then the bearing size for “J
1
” is:
EAS31077
INSTALLING THE CRANKSHAFT
1. Install:
•
Crankshaft journal upper bearings
(into the upper crankcase)
•
Crankshaft journal lower bearings
1
a
b
a
“J
1
” (crankcase) - “J
1
” (balancer shaft web) =
5 - 2 = 3 (brown)
Bearing color code
Code 1
Blue
Code 2
Black
Code 3
Brown
Code 4
Green
Code 5
Yellow
J
2
J
1
J
2
J
1
J
1
J
2
B