Maintenance Section
-121-
Torque Specifications
Metric Hardware
Most of the nuts, bolts, studs, and threaded holes in your
lift truck are metric. In this manual we provide
specifications in both metric and U.S. customary
measurement. Always replace metric hardware with
metric hardware. See the parts books for proper
replacement.
NOTE: For proper fit, use only metric tools on metric
hardware. Non-metric tools might slip and
cause injury.
Torque for Standard Hose Clamps –
Worm Drive
NOTICE
The chart below gives the torques for initial installation of
hose clamps on new hose and for reassembly or
retightening of hose clamps on existing hose.
Clamp Width
Initial Installation
Torque On New Hose
N·m
1
lb·in
16 mm (.625 in) 7.5 ± 0.5 65 ± 5
13.5 mm (.531 in) 4.5 ± 0.5 40 ± 5
8 mm (.312 in) 0.9 ± 0.2 8 ± 2
Clamp Width
Reassembly Or
Retightening Torque
N·m
1
lb·in
16 mm (.625 in) 4.5 ± 0.5 40 ± 5
13.5 mm (.531 in) 3.0 ± 0.5 25 ± 5
8 mm (.312 in) 0.7 ± 0.2 6 ± 2
1
1 Newton meter (N·m) is approximately the same as 0.1 kg·m.
Torque for Standard Bolts, Nuts,
and Taperlock Studs
NOTICE
The two charts below give general torques for bolts, nuts,
and taperlock studs of SAE Grade 5 or better quality.
Torques for Bolts and Nuts With Standard
Threads
Thread Size
Inch
Standard Nut and Bolt Torque
N·m
1
lb·ft
1/4 12 ± 4 9 ± 3
5/16 25 ± 7 18 ± 5
3/8 45 ± 7 33 ± 5
7/16 70 ± 15 50 ± 11
1/2 100 ± 15 75 ± 11
9/16 150 ± 20 110 ± 15
5/8 200 ± 25 150 ± 18
3/4 360 ± 50 270 ± 37
7/8 570 ± 80 420 ± 60
1 875 ± 100 640 ± 75
1 1/8 1100 ± 150 820 ± 110
1 1/4 1350 ± 175 1000 ± 130
1 3/8 1600 ± 200 1180 ± 150
1 1/2 2000 ± 275 1480 ± 200
1
1 Newton meter (N·m) is approximately the same as 0.1 kg·m.
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