Tightening Torques For Standard Bolts And Nuts; Tightening Fasteners; Hexagon Bolts And Nuts; Hose Clamps - Yanmar BY Series Service Manual

Tightening Torques for Standard Bolts and Nuts

TIGHTENING TORQUES FOR STANDARD BOLTS AND NUTS

Tightening Fasteners

Use the correct amount of torque when tightening fasteners. Applying excessive torque may damage the
fastener or component and not enough torque may cause a leak or component failure.

Hexagon Bolts and Nuts

Nominal
Diameter
M4
M5
M6
M7
M8
M8 x 1
M10
M10 x 1.25
M12
M12 x 1.5

Hose Clamps

Note: Reuse and retightening is prohibited for
all hose clamps. Always install new hose
clamps.
Size
5mm Hex Head
6mm Hex Head
BY Service Manual
8.8 or 8
2.7 N·m (24 in.-lb)
5.5 N·m (48.6 in.-lb)
9.5 N·m (84 in.-lb)
15 N·m (133 in.-lb)
23 N·m (204 in.-lb)
25 N·m (221 in.-lb)
46 N·m (34 ft-lb)
49 N·m (36 ft-lb)
80 N·m (59 ft-lb)
88 N·m (65 ft-lb)
Specification
1.0 - 1.5 N·m (8.9 - 13 in.-lb)
2.5 - 3.5 N·m (22 - 31 in.-lb)
GENERAL SERVICE INFORMATION
Grade (Lubricated)
10.9 or 10
3.88 N·m (34.3 in.-lb)
8 N·m (71 in.-lb)
13 N·m (115 in.-lb)
22 N·m (195 in.-lb)
32 N·m (24 ft-lb)
35 N·m (26 ft-lb)
64 N·m (47 ft-lb)
68 N·m (50 ft-lb)
110 N·m (81 ft-lb)
125 N·m (92 ft-lb)
12.9 or 12
4.6 N·m (41 in.-lb)
9.5 N·m (84 in.-lb)
16 N·m (142 in.-lb)
26 N·m (230 in.-lb)
39 N·m (29 ft-lb)
42 N·m (31 ft-lb)
77 N·m (57 ft-lb)
82 N·m (60 ft-lb)
135 N·m (100 ft-lb)
150 N·m (111 ft-lb)
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