Specifications

Page 5
Torque figures indicated are valid for non-
greased or non-oiled threads and heads un-
less otherwise specified. Therefore, do not
grease or oil bolts or capscrews unless oth-
erwise specified in this manual. When using
locking
elements, increase torque values
by 5%.
* GRADE or CLASS value for bolts and
capscrews are identified by their head mark-
ings.
Torque Specifications
Bolt Torque for Metric bolts *
CLASS 8.8 CLASS 9.8 CLASS 10.9
ìAî lb-ft (N.m) lb-ft (N.m) lb-ft (N.m)
6 9 (13) 10 (14) 13 (17)
7 15 (21) 18 (24) 21 (29)
8 23 (31) 25 (34) 31 (42)
10 45 (61) 50 (68) 61 (83)
12 78 (106) 88 (118) 106 (144)
14 125 (169) 140 (189) 170 (230)
16 194 (263) 216 (293) 263 (357)
18 268 (363) -- -- 364 (493)
20 378 (513) -- -- 515 (689)
22 516 (699) -- -- 702 (952)
24 654 (886) -- -- 890 (1206)
BOLT TORQUE TORQUE DATA FOR STANDARD
NUTS, BOLTS, AND CAPSCREWS.
Tighten all bolts to torques specified in chart unless other-
wise noted. Check tightness of bolts periodically, using bolt
chart as guide. Replace hardware with same grade bolt.
NOTE: Unless otherwise specified, high-strength Grade 5
hex bolts are used throughout assembly of equipment.
Bolt Torque for Standard bolts *
GRADE 2 GRADE 5GRADE 8
A lb-ft (N.m) lb-ft (N.m) lb-ft (N.m)
1/4 6 (8) 9 (12) 12 (16)
5/16 10 (13) 18 (25) 25 (35)
3/8 20 (27) 30 (40) 45 (60)
7/16 30 (40) 50 (70) 80 (110)
1/2 45 (60) 75 (100) 115 (155)
9/16 70 (95) 115 (155) 165 (220)
5/8 95 (130) 150 (200) 225 (300)
3/4 165 (225) 290 (390) 400 (540)
7/8 170 (230) 420 (570) 650 (880)
1 225 (300) 630 (850) 970 -(1310)
GRADE-2 GRADE-5 GRADE-8
8.8 10.9
9.8
CLASS 8.8 CLASS 9.8 CLASS 10.9
Important Notice!
Be sure towed vehicle is suitable or adaptable for towing.
A few models are not towable!
Be sure to check if towed vehicle requires additional equipment such as a
transmission lube pump, free-wheel hubs, driveline disconnect or axle locks. Failure to
properly equip towed vehicle will result in severe damage to towed vehicleís
transmission.
Be sure that towed vehicleís steering wheel is unlocked and free to turn. Check
manufacturerís specifications for the proper way to unlock steering wheel.
Be sure to check that receiver on towing vehicle is not inset to far. When attaching a
Demco towing product it is important that turning clearance is adequate. A receiver
that is inset to far on a towing vehicle will shorten turning radius. Failure to check this
may result in towing or towed vehicle to be damaged. It may be necessary to install a
receiver extension to allow for proper turning clearance.