7 | Maintenance
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DURO-A RC
7.3.4
Checking the Tightness of Screw Connections
If screws are replaced or undone, incorrect replacement or attachment may
lead to dangers for persons and objects. For this reason, for all fixing screws,
the screw recommended by the manufacturer of the screw must be used and
the tightening torque applied in accordance with the screw quality.
Tightening torque in Nm
Qua-
lity
M5
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
8.8
5.9
10.1
24.6
48
84
133
206
295
415
567
714
10.9
8.6
14.9
36.1
71
123
195
302
421
592
807
1,017
12.9
10
17.4
42.2
83
144
229
354
492
692
945
1,190
7.3.5
Inspection of the Power Chuck
Warranty by Service department of RÖHM GmbH
If the annual inspection of the power chuck is carried out by the Service
department of RÖHM GmbH, the warranty is extended by up to 3 years.
If the inspection is not carried out by the Service department of RÖHM
GmbH, the extended warranty lapses.
For inspection, the power chuck must be completely dismantled, cleaned and
re-assembled. Worn or damaged components must be replaced during the in-
spection.
Disassembly and dismantling of the power chuck
1.
Move piston of the power chuck into front position.
2.
Remove jaws (1-3) from the guides (Replacing Jaws [
}
79]).
3.
Screw the crane lug into the power chuck.
4.
Correctly attach the load-bearing equipment to the crane lug.
5.
Unscrew the threaded ring of the power chuck from the draw tube with
the assembly tool provided.
6.
Undo the three chuck fixing screws.
7.
Turn the power chuck over with a crane and set down at the cleaning
area.
8.
Unscrew crane lug.
Summary of Contents for DURO-A RC
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