Doosan G20E-5, Operation & Maintenance Manual, Page: 137 / 210

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Maintenance Section Maintenance Section
Torque Specifications Torque Specifications
Metric Hardware Metric Hardware
Most of the nu Most of the nuts, bolts, studs, and threaded holes in ts, bolts, studs, and threaded holes in
your lift truck are metric. In this manual we provide your lift truck are metric. In this manual we provide
specifications in both metric and U.S. customary specifications in both metric and U.S. customary
measurement. Always replace metric hardware with measurement. Always replace metric hardware with
metric hardware. See the parts books for proper
metric hardware. See the parts books for proper
replacement.
replacement.
NOTE: NOTE: For proper fit, use only metric tools on For proper fit, use only metric tools on
metric hardware. Non-metric tools might metric hardware. Non-metric tools might
slip and cause injury.
slip and cause injury.
Torque for Standard Hose Clamps Torque for Standard Hose Clamps
- Worm Drive
- Worm Drive
NOTICE NOTICE
The chart below gives the torques for initial The chart below gives the torques for initial
installation of hose clamps on new hose and for
installation of hose clamps on new hose and for
reassembly or retightening of hose clamps on
reassembly or retightening of hose clamps on
existing hose.
existing hose.
Initial Insta Initial Installatio llation n
Torque On New Hose Torque On New Hose Clamp Width Clamp Width
N N •• m m
1 1
lb lb •• in in
1 16 6 m mm m ((..6 62 25 5 iin n) ) 7 7..5 5 ± ± 0 0..5 5 6 65 5 ± ± 5 5
1 13 3..5 5 m mm m ((..5 53 31 1 iin n) ) 4 4..5 5 ± ± 0 0..5 5 4 40 0 ± ± 5 5
8 8 m mm m ((..3 31 12 2 iin n) ) 0 0..9 9 ± ± 0 0..2 2 8 8 ± ± 2 2
Reassembly or Reassembly or
Retightening Retightening
Torque On Existing Hose Torque On Existing Hose
Clamp Width Clamp Width
N N
••
m m
1 1
lb lb
••
in in
1 16 6 m mm m ((..6 62 25 5 iin n) ) 4 4..5 5 ± ± 0 0..5 5 4 40 0 ± ± 5 5
1 13 3..5 5 m mm m ((..5 53 31 1 iin n) ) 3 3..0 0 ± ± 0 0..5 5 2 25 5 ± ± 5 5
8 8 m mm m ((..3 31 12 2 iin n) ) 0 0..7 7 ± ± 0 0..2 2 6 6 ± ± 2 2
1 1
1 Newton meter (N 1 Newton meter (N •• m) is approximately the same as 0.1 kg m) is approximately the same as 0.1 kg •• m. m.
Torque for Standard Bolts, Nuts, Torque for Standard Bolts, Nuts,
and Taperlock Studs
and Taperlock Studs
NOTICE NOTICE
The two charts below give general torques for b The two charts below give general torques for bolts, olts,
nuts, and taperlock studs of SAE Grade 5 or better nuts, and taperlock studs of SAE Grade 5 or better
quality.
quality.
Torques for Bolts and Nuts with Torques for Bolts and Nuts with
Standard Threads
Standard Threads
Standard Nut and Bolt Torque Standard Nut and Bolt Torque Thread Size Thread Size
Inch Inch
N N •• m m lb lb •• ft ft
1/4 1/4 12 12 ± ± 4 4 9 9 ± ± 3 3
5/16 5/16 25 25 ± ± 7 7 18 18 ± ± 5 5
3/8 3/8 45 45 ± ± 7 7 33 33 ± ± 5 5
7/16 7/16 70 70 ± ± 15 15 50 50 ± ± 11 11
1/2 1/2 100 100 ± ± 15 15 75 75 ± ± 11 11
9/16 9/16 150 150 ± ± 20 20 110 110 ± ± 15 15
5/8 5/8 200 200 ± ± 25 25 150 150 ± ± 18 18
3/4 3/4 360 360 ± ± 50 50 270 270 ± ± 37 37
7/8 7/8 570 570 ± ± 80 80 420 420 ± ± 60 60
1 1 875 875 ± ± 100 100 640 640 ± ± 75 75
1 1 1/8 1/8 1100 1100 ± ± 150 150 820 820 ± ± 110 110
1 1 1/4 1/4 1350 1350 ± ± 175 175 1000 1000 ± ± 130 130
1 1 3/8 3/8 1600 1600 ± ± 200 200 1180 1180 ± ± 150 150
1 1 1/2 1/2 2000 2000 ± ± 275 275 1480 1480 ± ± 200 200
1 1
1 Newton meter (N 1 Newton meter (N
••
m) is approximately the same as 0.1 kg m) is approximately the same as 0.1 kg
••
m. m.