Echo 74624 Owners Manual v.2 - Manual (Page 28)

26
sPecificaTions
the tables shown below give correct torque values for various bolts and capscrews. tighten all bolts to the torques
specified in chart unless otherwise noted. Check tightness of bolts periodically, using this bolt torque chart as a guide.
Fasteners should be replaced with the same grade. tighten serrated or center-lock nuts to the full torque value.
Do not use these values if a different torque value or tightening procedure is given for a specific application. Torque
values listed are for general use only.
Torque figures indicated at left
are valid for non-greased or
non-oiled threads and heads
unless otherwise specified.
therefore, do not grease or
oil bolts or capscrews unless
otherwise specified in this
manual. When using locking
elements, increase torque
values by 5%.
* torque value for bolts and
capscrews are identified by
their head markings.
sae - 8 sae - 2
a
sae - 5
sae
grade
and
head
markings
bolT diameTer
unified inch bolT TorQue values
(unless otherwise specified in the manual)
bolt Torque *
(n.m) (ft - lb) (n.m) (ft - lb) (n.m) (ft - lb)
1/4" 7.5 5.5 12 9 17 12.5
5/16” 15 11 25 18 35 26
3/8” 27 20 44 33 63 46
7/16” 44 32 70 52 100 75
1/2” 67 50 110 80 150 115
9/16” 95 70 155 115 225 160
5/8” 135 100 215 160 300 225
3/4” 240 175 375 280 550 400
7/8” 240 175 625 450 875 650
1” 360 270 925 675 1300 975
1-1/8” 510 375 1150 850 1850 1350
1-1/4” 725 530 1650 1200 2600 1950
1-3/8” 950 700 2150 1550 3400 2550
1-1/2” 1250 930 2850 2100 4550 3350
sae 2
bolt
diameter
"a"
sae 5 sae 8
SPECIAL TORQUE REQUIRMENTS
locaTion on machine hardWare descriPTion
TorQue (uni-
fied inch)
oN dISk, bladE MouNtINg SCREWS
1/2 x 1-3/4” FlHd (aStMF835) CaP SCREWS
(Qty 8)
120 Ft-lbS
Section
7