3.2 Screw fasteners
Metric threads are used on the product.
Some bolt fasteners are locked with screws treated
with Eslok
®
Nylon 180°. The screw threads have a
red coating. These screws can be retted 3 times
before they have to be replaced.
Always torque tighten screw unions as given in the
table, unless specied otherwise in the instruction.
Spanner
size
Allen key Thread Tightening
torques
8 mm 4 mm M5 52 ft/lb (6 Nm)
10 mm 5 mm M6 52 ft/lb (10 Nm)
- - 3 mm M6 52 ft/lb (10 Nm)
13 mm 6 mm M8 52 ft/lb (24 Nm)
- - 4 mm M8 18 - 20 Nm
17 mm 8 mm M10 52 ft/lb (47 Nm)
17 mm - - M10 12.9 52 ft/lb (70 Nm)
18-19 mm 10 mm M12 52 ft/lb (81 Nm)
24 mm - - M16 80 ft/lb (110 Nm)
30 mm - - M20 52 ft/lb (200 Nm)
32 mm - - - - Hydraulic
couplings, see
separate chapter.
Certain unions are screwed into the goods with a
through screw and a locknut. The thread in the goods
is intended to take the eective torque and the
locknut is to secure the union during use.
Therefore, the main part of the torque - screw in the
goods - should always be tightened rst and then
secured with the locknut, which is tightened with less
torque. If the locknut is tightened with too high a
torque, the screw in the goods thread will be
unstressed and the bolt fastening will come loose
during use.
3.3 Hydraulic couplings
When hydraulic hoses and pipes that are NOT
specied on the next page, are assembled, rst
tighten their cap nuts by hand to a stop. Then tighten
a further 1½ ats of the wrench grip. This
corresponds to an approximate 90° turn.
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