Echo 74500 Owners Manual v.2 - Manual (Page 31)

Page 25 Skid Steer Chipper Operator’s Manual
BOLT TORQUE REQUIREMENTS
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 bolt. 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 other-
wise specified. Therefore, do not
grease or oil bolts or capscrews
unless otherwise specified in this
manual. When using locking ele-
ments, increase torque values by
5%.
* Torque value for bolts and
capscrews are identified by their
head markings.
Specifications
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 REQUIREMENTS
LOCATION ON MACHINE HARDWARE DESCRIPTION
TORQUE
(UNIFIED INCH))
TORQUE
(METRIC)
74500 CHIPPER BLADE MOUNTING BOLTS 5/16" X 1 1/4" HEX HD. GRADE 8 BOLTS (QTY 8) 20 ft-lbs 27 N.m
74800 CHIPPER BLADE MOUNTING BOLTS 1/2" X 2 1/2" FLAT HYD SKT. (QTY 12) 75 ft-lbs 101 N.m