75 - 12
Ram Piston Head Nut (cont’d)
Nut Fitting (cont’d)
Table 1
Required Tightening Necessary Gauge
Torques Pressure
Nm lbf ft bar lbf/in
2
640 472 4.4 64
1400 1033 9.6 140
1470 1084 10.1 147
1790 1320 12.3 179
1840 1357 12.7 184
1900 1401 13.1 190
2230 1645 15.4 223
2300 1696 15.9 230
2620 1933 18.1 262
3480 2567 24.0 348
3580 2641 24.7 358
3590 2648 24.7 359
4590 3385 31.6 459
4820 3555 33.2 482
5140 3791 35.4 514
6220 4588 42.8 622
8700 6417 60.0 870
9100 6712 62.7 910
9330 6882 64.3 933
9425 6952 64.9 942
10700 7892 73.8 1070
10740 7922 74.0 1074
12700 9367 87.6 1270
12750 9404 87.9 1275
14000 10326 96.5 1400
16900 12465 116.5 1690
17700 13055 122.0 1770
19615 14468 135.2 1961
21000 15490 144.8 2100
21500 15858 148.3 2150
The torque is determined by reading the pressure on gauge
F in the rig circuit (with the spanner at 90° to the rig ram) and
converting it according to the table above.
Note: The pressures in the above table assume that the rig
is used with spanners having 500 mm centres.
Section E Hydraulics
9803/6410
Section E
75 - 12
Issue 1
Hydraulic Rams
Table 2
JS130
Ram Location Dimensions Piston Nut Piston Nut Torque Grub Screw Torque Gland Torque
Bore x Rod (mm) AF (mm) Nm (lbf ft) Nm (lbf ft) Nm (lbf ft)
Boom 100 x 75 75 2430 (1798) 31.5 ± 5.9 (23.3 ± 4.4) 171 (127)
Dipper 115 x 80 85 5650 (4181) 56.9 ± 10.7 (42.1 ± 7.9) 267 (198)
Bucket 95 x 70 75 3270 (2420) 31.5 ± 5.9 (23.3 ± 4.4) 171 (127)
JS160
Ram Location Dimensions Piston Nut Piston Nut Torque Grub Screw Torque Gland Torque
Bore x Rod (mm) AF (mm) Nm (lbf ft) Nm (lbf ft) Nm (lbf ft)
Boom 115 x 80 85 3770 (2790) 56.9 ± 10.7 (42.1 ± 7.9) 267 (198)
Dipper 125 x 90 95 7420 (5491) 56.9 ± 10.7 (42.1 ± 7.9) 267 (198)
Bucket 105 x 75 80 4310 (3190) 56.9 ± 10.7 (42.1 ± 7.9) 171 (127)
To Next Page
Loading...
Need help?
General
