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Yanmar 3JH3E Service Manual page 264

Marine diesel engine
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Chapter 10 Disassembly and Reassembly
_3_. D_is_a_s_se_m_bl_y_a_n_d_R_e_as_s_e_m_b_ly ________________________
3,4JH3(B)(C)E
3-2.19 Mounting the rnarire gearbox
(1)
Mount the fan and damper disk to the flywheel.
(2)
Align the damper disk with the input shaft spline and
insert Tighten the flywheel housing and flange.
Damper disk
3-2.20 Mounting lhe crank V-pulley
(1)
Coat the oil seal and the section of the shaft with which
it comes in contact with oil.
(2)
Tighten to the speclied torque.
il
.
•.
ar case
a,h,:7
Crankshaft V-pulley
Hex
bolt
kg·m
V-pulley tightening torque
11.5~12.5
10-28
3-2.21 Mounting the cylinder head
(1) Fit the Qasket packing against the cylinder block, align-
ing it with the cylinder block posihoning pins.
NOTE: The side on which the engine model is inscribed
should face up (cylinder head side).
(2)
Lift the cylinder head hoizomtally and mount aligning
with the cylinder head gaskel
(3)
Coat the mounting bolt washers and threads with engine
oil, and lightly tighten the bolts in the specified order
Then tighten completely, in the same order.
QJ
"O
iii
C,
QJ
-C
3::
>-
u::
(3 Cylinder)
QJ
:<;>
(/J
a,
QJ
-C
t
u::
(4 Cylinder)
@
@
@
@
G)
®
Cylinder bolt
tightening torque
J--cyl:nder head bait
Cylinder head
Camshaft side
CD
@
@
®
FO pump side
Camshaft side
@
®
@
@
@
@
©
@
FO pump side
Partial
Complete
4.0~5.0
9.0~9.6
QJ
LJ
-u;
QJ
<J)
ro
u
cri
QJ
(.'.}
QJ
LJ
·;;;
QJ
<fl
ro
e
ro
QJ
(.'.}
kg·m
(4) Measure the top clearance
top clearance
0.74
mm
Printed in Japan
HINSHI-H8009

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