Yamaha F150B, Руководство по обслуживанию

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7-38
Cylinder head
0
1
2
3
4
5
6
7
8
9
10
A
Removing the cylinder head
1. Remove the valve lifters from the cylinder
head.
2. Remove the cylinder head bolts in the
sequence numbers (
a
,
b
, · · ·).
NOTICE: Do not scratch or damage
the mating surfaces of the cylinder
head and cylinder block.
3. Remove the intake and exhaust valves.
TIP:
Make sure to keep the valves, springs, and
other parts in the order as they were
removed.
Checking the valve lifter
1. Check the valve lifters. Replace if dam-
aged, scratched, or worn.
2. Measure the valve lifter outside diameter.
Replace if out of specification.
Checking the cylinder head
1. Eliminate carbon deposits from the com-
bustion chambers and check for deterio-
ration.
2. Check the cylinder head warpage using a
straightedge
a
and thickness gauge
b
in the directions shown. Replace the
cylinder head assembly if above
specification.
Valve spring compressor
a
:
90890-04019
Valve spring compressor attachment
b
:
90890-06320
(T55)
a b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q r
s
t
a
b
Valve lifter outside diameter
a
:
32.982–32.997 mm (1.2985–1.2991 in)
a
b
a