Claas LEXION 480, Repair Manual

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188 678.1 - RHB LEXION 480
1.3.3
General repair information
4. Tighten the union nut half a turn beyond the point
where resistance is felt.
5. Check the cut made by the ferrule edge: A visible
shoulder must fill the space before the ferrule front
end. The ferrule may rotate, but axial displace-
ment must not be possible.
Installation:
Insert the pre-assembled tube into the well-oiled
threaded joint, tighten the union nut up to the point
where resistance is felt and then half a turn beyond
this point.
Re-installation:
Every time the ferrule fitting has been loosened,
retighten the union nut without using increased force.
Ferrule fitting leaks:
If a ferrule fitting leaks, first loosen the union nut until
some oil escapes and then tighten it as specified.
Progressive ring fittings on hydraulic lines
When pre-assembling the unit and for pre-assembled
factory-delivered progressive ring fittings, the following
applies: installation is in the associated, well-oiled
threaded joint with half a turn of the union nut beyond
the point where resistance is clearly felt.
Pre-assembly:
1. Cut off the tube at right angles. Do not use a pipe
cutter! This will slant the tube wall, causing heavy
inside and outside burrs. Slightly deburr the tube
end on the inside and outside (do not chamfer!)
and clean it. In case of tube bends, the straight
tube end up to where the bending radius starts
must be at least twice the height of the union nut.
2. Push the union nut and the progressive ring on the
tube.
3. Push the tube against the stop in the union and
tighten union nut until the progressive ring grips
the tube (the tube must not rotate with the nut).
This point can be felt because increase power is
needed from here.
4. Tighten the union nut half a turn beyond the point
where resistance is felt.
5. Check the cut made by the progressive ring edge:
A visible shoulder must fill the space before the
progressive ring front end. The progressive ring
may rotate, but axial displacement must not be
possible.
Installation:
Insert the pre-assembled tube into the well-oiled
threaded joint, tighten the union nut up to the point
where resistance is felt and then half a turn beyond
this point.
Important: Back up the threaded joint with a
wrench!
Re-installation:
Every time the progressive ring fitting has been
loosened, retighten the union nut until resistance is felt
and then continue for half a turn beyond that point.
Important: Back up the threaded joint with a
wrench!
Progressive ring fitting leaks:
If a progressive ring fitting leaks, first loosen the union
nut until some oil escapes and then tighten it as
specified.
ATTENTION!
Failure to observe the tightening torques
reduces the nominal power and the service
life of the fitting, resulting in leaks and in the
tube slipping out.
Taper fittings on hydraulic lines
Installation:
Apply oil to the O-ring on the taper. Tighten the union
nut a third of a turn beyond the point where resistance
is felt.
Important: Back up the threaded joint with a
wrench!
ATTENTION!
Failure to observe the tightening torques
reduces the nominal power and the service
life of the fitting, resulting in leaks and in the
tube slipping out.