How To Use This Manual; Manual Format - Yamaha F30B 2018 Service Manual

How to use this manual

Manual format

The format of this manual has been designed to make service procedures clear and easy to under-
stand. Use the following information as a guide for effective and quality service.
• Parts are shown and detailed in an exploded diagram and are listed in the component list (see "1" in
the following figure for an example page).
• The component list consists of the basic removal or disassembly order ("
and remarks, which indicate the bolt and screw dimensions and other information (see "2" in the fol-
lowing figure). For the installation or assembly procedure, reverse the order.
• Symbols are used to indicate important aspects of a procedure, such as the grade of lubricant and
the lubrication points (see "3" in the following figure).
• Tightening torque specifications are provided in the exploded diagrams (see "4" in the following fig-
ure), and in the related detailed instructions. Some torque specifications are listed in stages as torque
figures or angles in degrees.
• Separate procedures and illustrations are used to explain the details of removal, checking, and instal-
lation where necessary (see "5" in the following figure for an example page). Detailed explanations of
the procedures are enclosed in
• Numbers enclosed in brackets are used to indicate the removal or tightening order of bolts, screws,
and other parts (see "7" in the following figure).
TIP:
For troubleshooting procedures, see Chapter 4, "Troubleshooting".
Cylinder head
15 New
16
16
14
3
New
2
1
Part name Q'ty Remarks
1 Bolt M6 45 mm 4
2 Oil pump assembly 1
3 Gasket 1
4 Bolt M6 20 mm 7
5 Cylinder head cover 1
6 Gasket 1
7 Screw M4 10 mm 4
8 Plate 1
9 Grommet 5
10 Oil filler cap 1
11 O-ring 1
12 Bolt M6 25 mm 4
13 Bolt M9 93 mm 8
Cylinder head assem-
14 1
bly
15 Gasket 1
16 Dowel pin 2
2
3
Cylinder head
6 N·m (0.6 kgf·m, 4.4 lb·ft)
12 N·m (1.2 kgf·m, 8.9 lb·ft)
17 N·m (1.7 kgf·m, 13 lb·ft)
12
34 N·m (3.4 kgf·m, 25 lb·ft)
90°
13
7
8
7
9
11
6 New
9
5
1
1
7-25
(see "6" in the following figure for an example page).
4 1
d
9
Cylinder head bolt (M9) diameter
4
difference limit
"a" – "b" = Less than 0.13 mm
(0.01 in)
Measuring point "c": 10.0 mm
10
(0.39 in)
Measuring point "d": 62.5 mm
(2.46 in)
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Installing the cylinder head
Before installing the cylinder head, check the
cylinder head bolts. See "Checking the cylinder
head bolt" (7-26).
1. Check that the hole "a" on the retaining
plate is aligned with the "△" mark "b" on
the cylinder block.
2. Install:
• Dowel pin
• Cylinder head gasket
• Cylinder head
6
0-7
How to use this manual
"), part names, quantities,
5
3. Tighten:
• Cylinder head bolt (M9)
• Cylinder head bolt (M6)
b a
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a. Tighten the cylinder head bolts (M9) "1" to
the specified torques in 3 stages and in the
c
order [1], [2], and so on.
TIP:
In the third tightening stage for the cylinder
head bolts (M9) "1", mark the bolts and cylinder
head with identification marks "a", and then
tighten the bolts 90 from the marks on the cyl-
inder head.
b. Tighten the cylinder head bolts (M6) "2" to
the specified torques in 2 stages and in the
order [9], [10], and so on.
[8]
[12]
90
a
[10]
[4]
[9]
2
[1]
[11]
b
[5]
a
Cylinder head bolt (M9) "1" [1]–[8]
1st: 17 N·m (1.7 kgf·m, 13 lb·ft)
2nd: 34 N·m (3.4 kgf·m, 25 lb·ft)
3rd: 90
Cylinder head bolt (M6) "2" [9]–
[12]
1st: 6 N·m (0.6 kgf·m, 4.4 lb·ft)
2nd: 12 N·m (1.2 kgf·m, 8.9 lb·ft)
New
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7-27
7
Cylinder head
1
[7]
[3]
[2]
[6]