FENDT Vario MT 938, Workshop Service Manual

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1.7 Technical data
1.7.1 Torque specifications
1.7.1.1 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.
1.7.1.2 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. 38
1.7.1.3 Metric fasteners
This chart shows the assembly torque values for metric 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
M6 x 1 8 to 10 9 to 15 9 to 11 10 to 16 3.5 to 4.5 5 to 7
M8 x 1.25 19 to 23 21 to 35 20 to 24 23 to 37 10 to 12 12 to 18
M10 x 1.5 37 to 45 45 to 65 40 to 48 48 to 72 20 to 24 23 to 37
M12 x 1.75 67 to 83 80 to 120 72 to 88 85 to 125 31 to 39 40 to 60
M14 x 2 108 to 132 130 to 190 120 to 140 145 to 205 55 to 65 65 to 95
M16 x 2 160 to 190 200 to 280 180 to 220 230 to 310 80 to 100 105 to 145
M20 x 2.5 305 to 375 400 to 520 350 to 430 460 to 600 165 to 205 210 to 290
[V]
[V]
GUID-0BAF2E7B-A615-4A36-871A-E23E5E1880B6 [V1]
GUID-03C6C458-36BC-45F9-91AA-8E77890FAF81 [V2]
GUID-7105753C-3D3A-488B-8DC0-08A33FBEFA68 [V1]
1. General
Rubber Track Tractor 1-45
79037272A