Kesla proG 20, Manual

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GRAPPLES – USER MANUAL 13
6.3. REGULAR SCHEDULED MAINTENANCE
The given maintenance intervals are valid only when the machine
works at normal capacity in normal operation conditions. Shorten
the maintenance intervals if the machine is used heavily or when
working conditions are disadvantageous (very high or low
temperature, sand, dust, mud, etc.).
6.3.1. After the first 20 hours
During the first working hours with a new machine loosening of
some screws and bolts is normal. Therefore, after the first 20
working hours please check and tighten, if needed, all the bolts
and screws of the grapple.
Please see the list below for the correct tightening torque for each
screw.
Tightening torque for screws with a metric ISO thread
(unless specified separately)
Nm
8.8 10.9 12.9
M4 2.8 4.0 4.9
M5 5.7 7.9 9.5
M6 9.7 13.7 16.2
M8 23.5 33.3 39.2
M10 47.1 65.7 79.4
M12 81.4 114.7 137.0
M14 130.0 181.0 216.0
M16 196.0 280.0 333.0
M18 270.0 382.0 461.0
M20 382.0 539.0 647.0
M22 519.0 730.0 873.0
M24 662.0 932.0 1118.0
M30 1324.0 1863.0 2236.0