1.12 Torque specifications
WARNING: Mismatched or incorrect fasteners can cause damage or malfunction, or personal injury. Take
care to avoid mixing metric dimensioned fasteners and inch dimensioned fasteners.
Exceptions to these torques are in the service manual, if necessary.
Before installation of any hardware, make sure the components are in near new condition. Bolts and
threads must not be worn or damaged. Threads must not have burrs or nicks. Hardware must be free of
rust and corrosion. Clean hardware with a non corrosive cleaner.
Do not lubricate the fastener threads except for rust preventive. Rust preventive should be applied by
supplier of that component for purposes of shipping and storage. Other applications for lubricating
components may also be specified in service manual.
1.12.1 Constant torque hose clamps
Because of extreme temperature changes, hose will heat set. Heat setting can cause hose clamps to
loosen. Loose hose clamps can cause leaks and cause component failures. Constant torque hose clamp
will help prevent these failures.
Constant torque hose clamp is installed correctly
under the following conditions:
• Screw tip (1) extends 6.35 mm (.25 in) (A)
beyond housing.
• Belleville springs are collapsed nearly flat after
screw (2) is tightened to a torque of 11 Nm (8.1
lbf ft) .
GUID-8A45BF90-64A6-4B49-A7CB-CD277F5F4AC4-high.jpg [High]
Fig. 45
1.12.2 Inch fasteners
This chart shows the assembly torque values for inch fasteners.
Standard High Low
Thread Size Pound Feet
lbf ft
Newton
Meters Nm
Pound Feet
lbf ft
Newton
Meters Nm
Pound Feet
lbf ft
Newton
Meters Nm
1/4 - 20 8 to 10 9 to 15 9 to 11 10 to 16 3.5 to 4.5 5 to 7
5/16 - 18 16 to 20 21 to 31 18 to 22 21 to 35 9 to 11 10 to 16
3/8 - 16 31 to 39 38 to 56 36 to 44 40 to 60 16 to 20 19 to 31
7/16 - 14 45 to 55 65 to 85 54 to 66 65 to 95 27 to 33 32 to 48
1/2 - 13 67 to 83 85 to 125 81 to 99 100 to 140 40 to 50 48 to 72
9/16 - 12 110 to 130 130 to 190 117 to 143 145 to 205 55 to 65 70 to 100
5/8 - 11 145 to 175 175 to 255 160 to 190 200 to 280 75 to 95 95 to 135
3/4 - 10 245 to 305 320 to 420 290 to 350 370 to 490 135 to 165 160 to 240
7/8 - 9 410 to 510 540 to 700 470 to 570 610 to 790 215 to 265 285 to 365
1 - 8 590 to 730 800 to 1000 700 to 850 900 to 1200 335 to 405 435 to 565
4
GUID-0BAF2E7B-A615-4A36-871A-E23E5E1880B6 [V1]
GUID-03C6C458-36BC-45F9-91AA-8E77890FAF81 [V2]
GUID-B6FCD0B7-880F-4B76-8372-85A57C6E3FC0 [V1]
1. General
Rubber Track Tractor 1-45
79036614D
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