Tightening Torques; Tightening Torques For General Use Screws, Bolts And Nuts - Kubota SM-E4B Series Workshop Manual

SM-E4B SERIES, WSM

3. TIGHTENING TORQUES

Screws, bolts and nuts must be tightened to the specified torque using a torque wrench, several screws, bolts and
nuts such as those used on the cylinder head must be tightened in proper sequence and the proper torque.
[1] TIGHTENING TORQUES FOR GENERAL USE SCREWS, BOLTS
AND NUTS
When the tightening torques are not specified, tighten the screws, bolts and nuts according to the table below.
Indication on
top of bolt
Unit N·m
M6 7.9 to 9.3
M8 18 to 20
M10 40 to 45
M12 63 to 72
Screw and bolt material grades are shown by numbers punched on the screw and bolt heads. Prior to tightening,
be sure to check out the numbers as shown below.
Punched number Screw and bolt material grade
None or 4 Standard screw and bolt SS41, S20C
7 Special screw and bolt S43C, S48C (Refined)
No-grade or 4T
kgf·m lbf·ft
0.80 to 0.95 5.8 to 6.8
1.8 to 2.1 13 to 15
4.0 to 4.6 29 to 33
6.4 to 7.4 47 to 53
1-S12
9Y1210785ENS0003US0
7T
N·m kgf·m
9.81 to 11.2 1.00 to 1.15
24 to 27 2.4 to 2.8
48 to 55 4.9 to 5.7
78 to 90 7.9 to 9.2
9Y1210785ENS0004US0
ENGINE
lbf·ft
7.24 to 8.31
18 to 20
36 to 41
58 to 66
KiSC issued 01, 2013 A