BOLT TORQUES
As
a lot of bolts and nuts
in
the engine are of special shape,
be
careful
to
tight~n
them correctly using a torque
wrench.
When tightening,
follow this method:
First tighten
all the bolts 50% of the regular torque, then tighten them fully.
TIGHTENING BOLTS OF IMPORTANT PARTS
• Marked bolts must
be
tightened after applying oil.
Model M-18
M2-25
• Head bolts and nuts
6.6
to
7.1
kgf/m
6.6
to
7.1
kgf/m
47.
7 to
51.4
ft/lbs.
47.7
to
51.4
ft/lbs.
• Bearing case bolts 1
2.0 to 2.4 kgf/m
2.0 to 2.4 kgf/m
14.5
to
17.4
ftllbs.
14.5
to
17.4
ftllbs.
•
Bearing case bolts 2
3.0
to
3.5
kgf/m
3.0
to
3.5
kgf/m
21.7
to
25.3
ft/lbs.
21.7
to
25.3
ft/lbs.
• Flywheel bolts
5.5
to
6.0
kgf/m
5.5
to
6.0
kgf/m
39.8
to 43.4 ft/lbs.
39.8
to 43.4 ftllbs.
•
Connecting rod bolts
2.7 to
3.1
kgf/m
2.7 to
~
1 kgf/m
19.5
to 22.4 ft/lbs.
19.5
to 22.4 ftllbs.
•
Rocker arm bracket
1.7
to
21.1
kgf/m
1.7
to
2.1
kgf/m
studs
12.3
to
15.2
ft/lbs.
12.3
to
15.2
ftllbs.
• Idle
gear shaft bolts
1.0
to
1.15
kgf/m
1.0
to
1.15
kgf/m
7.23 to
8.32
ft/lbs.
7.23 to
8.32
ft/lbs.
Glow plugs
2.0
to 2.5
kgf/m
2.0 to
2.5
kgf/m
(No need to apply oil)
14.5
to
18.1
ft/lbs.
14.5
to
18.1
ft/lbs.
Drain
plugs
4.0
to
4.5
kgf/m
4.0
to
4.5
kgf/m
28.9
to 36.2 ftllbs.
28.9
to 36.2 ft/lbs.
Nozzle holders
3.0
to
5.0
kgf/m
3.0
to
5.0
kgf/m
21.7
to 36.2 ft/lbs.
21.7
to 36.2 ftllbs.
Bis
0.14
to 0.20 kgf/m
0.14
to 0.2 kgf/m
Oil
10.1
to
14.5
ft/lbs.
10.1
to
14.5
ft/lbs.
switch
Taper
Screw
1.5
to 2.0 kgf/m
1.5
to 2.0 kgf/m
10.8
to
14.5
ft/lbs.
10.8
to
14.5
ft/lbs.
Fuel limit lock nut
2.8
to
3.5
kgf/m 2.8 to
3.5
kgf/m
20.3
to
25.3
ftllbs.
20.3
to
25.3
ft/lbs.
Fuel liimit cap nut
2.5
to
3.0
kgf/m 2.5 to
3.0
kgf/m
18.1
to
21.7
ft/lbs.
18.1
to
21.7
ftllbs.
Injection pipes
1.5
to 2.5 kgf/m
1.5
to 2.6 kgf/m
10.8
to
18.8
ftllbs.
10.8
to
18.8
ft/lbs.
• Crankshaft nut
14
to
16
kgf/m
14
to
16
kgf/m
100
to
116
ft/lbs.
101
to
116
ftllbs.
Air vent screw
1.4
to
1.8
kgf/m
1.4
to
1.8
kgf/m
(on injection pump)
10.1
to
13.0
ft/lbs.
10.1
to
13.0
ft/lbs.
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