CRANE RANGE
20
© 2015 FORS MW Ltd
3.5
Tightening torques
The tightening torque (Mv) in Nm for untreated, oiled steel screw joints when using a torque wrench or
screwdriver/wrench with torque control. Torque range max. ± 5%. Metric coarse threads. All bolts must
be tightened after 10 hours of operation.
Thread M
Property class according to SS-ISO 898/1
8,8
10,9
12,9
5
5,7
8,1
9,7
6
9,8
14
17
8
24
33
40
10
47
65
79
12
81
114
136
14
128
181
217
16
197
277
333
18
275
386
463
20
385
541
649
22
518
728
874
24
665
935
1 120
3.6 Storage
If the crane is not going to used for an extended period (longer than 2 months) of time, it is important to
clean it carefully. Note that high-pressure washing is not recommended. After washing, all the lubricat-
ing points must immediately be lubricated. When lubricating with new grease, it forces the water away
from the surfaces and thereby counteracts corrosion and wear.
To prevent the risk of rust inside the turnhouse cylinder when crane is stored for extended periods it is
recommended to fill gear oil up to the plug (see 3.3 for picture). NB! When crane will be taken into action
again it is important to detract oil from the turnhouse. It means when the crane is in use the oil level
must be 1 cm below the plug (see 3.3 for picture).
• Store the crane under a roof. If this is not possible, the crane must be covered with a tarpaulin.
• Before lowering the crane onto its storage surface, ensure that the surface will not give way during
the storage period, for example due to rain or the thawing of frozen soil.
• Place the boom and the grapple in the transport position.
• During storage, the crane’s angle of incline must not exceed 25° in order to prevent oil running into
the slewing mechanism.
• Support the crane to ensure it will not overturn during storage.
Note: A crane in storage is not a play area for children.
