Yamaha F150B, Руководство по обслуживанию

Страница: 272 / 458

7-59
Power unit
POWR
TIP:
Do not put the Plastigauge (PG-1) over the oil
hole in the crankshaft journals.
5. Install the remaining half of the main
bearings into the crankcase.
TIP:
Install the main bearings in their original posi-
tions.
6. Install the main bearing cap and
crankcase onto the cylinder block and
apply engine oil to the threads of the
main bearing cap bolts
d
, crankshaft
bolts
e
, and crankcase bolts
f
.
7. Tighten the main bearing cap bolts
d
and crankshaft bolts
e
to the specified
torques in 2 stages and in the sequence
numbers (
a
,
b
, · · ·). In the 2nd stage,
make a mark
a
on the crankcase main
bearing cap bolts
d
and crankshaft bolts
e
, and then tighten the bolts 90° from
the mark. NOTICE: Main bearing cap
bolt
d
a
–
f
and crankshaft bolts
e
a
–
d
can be reused 3 times.
8. Tighten the crankcase bolts
f
to the
specified torques in 2 stages.
9. Remove the main bearing cap and
crankcase, and then measure the width
of the compressed Plastigauge (PG-1)
on each main journal. Replace the main
bearing if out of specification.
Main bearing cap bolt
d
a
–
f
(M10):
1st: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
2nd: 90°
Crankshaft bolt
e
a
–
d
(M10):
1st: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
2nd: 90°
Crankcase bolt
f
e
–
n
(M8):
1st: 14 N·m (1.4 kgf·m, 10.3 ft·lb)
2nd: 26 N·m (2.6 kgf·m, 19.2 ft·lb)
90
d
a
a b
c d
e f
90
f
e e
e
a
a b
c d
e f
g h
i j
k l
m n