Yanmar 3TNV82A-B Service Manual page 195

4-Valve Cylinder Head
Figure 6-70
3. Lightly oil the threads of the cylinder head bolts
(Figure 6-70, (1)). Tighten the bolts to the
specified torque in two steps as shown in the
chart below. Tighten in the sequence shown in
(Figure 6-71). See Special Torque Chart on
page 6-25 for specification.
First Step
Second Step
TNV DI Service Manual
(1)
(2)
0001872
1/2 of final torque
Final torque
7
13 3
11 5
9
12 3
18 10
8
16
14 6
1 – Fan End
2 – Camshaft Side
Figure 6-71
Reassembly of Rocker Arm Assembly
1. Reinstall the valve bridges (Figure 6-72, (3)) in
their original locations and ensure each seat
(Figure 6-72, (4)) is in place.
2. Insert the push rods (Figure 6-72, (2)) in their
original locations.
(4)
(3)
Figure 6-72
ENGINE
(2)
1 10
6 12
(1)
4 14
2 8
(2)
5 13
1 7 15
(1)
9
2 17
4 11
0001875
(1)
(2)
0001871
6-63