PERIODIC MAINTENANCE
JH Series Operation Manual
109
Main Bolts and Nuts
Name
Thread Diameter
x Pitch
Lubricating Oil
Application
(thread portion and
seat surface)
Torque
N·m (ft-lb)
Head bolt
M10 x 1.25
Apply oil
88.2 ± 2.9 (65.1 ± 2.1)
Connecting rod bolt
M9 x 1.0
Apply oil
44.1
+4.9/0
(32.5
+3.6/0
)
Flywheel bolt
M10 x 1.25
Apply oil
83.3
+4.9/0
(61.4
+3.6/0
)
Metal cap bolt
M12 x 1.5
Apply oil
98.0 ± 2.0 (72.3 ± 1.5)
Crank pulley bolt
M14 x 1.5
Apply oil
88.2 ± 4.9 (65.1 ± 3.6)
Injector retainer bolt
M8 x 1.25
Without oil
26.4 ± 2.0 (19.5 ± 1.5)
Rocker arm support bolt
M8 x 1.25
Without oil
25.5 ± 1.5 (18.8 ± 1.1)
Rocker arm cover nut
M8 x 1.25
Without oil
13.5 ± 0.5 (10.0 ± 0.4)
Supply pump gear nut
M18 x 1.5
Without oil
80.0 ± 5.0 (59.0 ± 3.7)
Retainer bolt for
Flywheel speed sensor
M6 x 1.0
Without oil
8.0 ± 2.0 (5.9 ± 1.5)
Retainer bolt for
Cam shaft speed sensor
M6 x 1.0
Without oil
8.0 ± 0.5 (5.9 ± 0.4)
Retainer nut for
Lubricating Oil Cooler
M20 x 1.5
Without oil
78.5 ± 4.9 (57.9 ± 3.6)
High pressure
pipe nut
Injector
M12 x 1.5
Without oil
29.4
+2/-4.4
(21.7
+1.5/-3.2
)
Rail
M12 x 1.5
Without oil
Pump
M16 x 1.0
Without oil
Glow plug
M10 x 1.25
Without oil
Body
14.7 to 19.6
(10.8 to 14.5)
M4 x 0.7
Terminal
nut
1.0 to 1.5
(0.7 to 1.1)
Heat exchanger set bolt
M8 x 1.25
Without oil
37.2 ± 3.0 (27.4 ± 2.2)
Pressure sensor
M6 x 1.0
Without oil
7.0 ± 1.4 (5.2 ± 1.0)
Starter relay terminal nut
M6 x 1
Without oil
3.6 ± 0.6 (2.7 ± 0.4)
3JH40_4JH45_4JH57_4JH80_4JH110_EN_OPM.book 109 ページ 2022年9月22日 木曜日 午後6時17分