Claas RU 450, Repair Handbook

Page: 13 / 31

297 925.0 - RU 450
1.2 / 3
General information
pletely still be in contact). Loosen the expansion
pin using a stroke pipe with a powerful stroke.
Tightening:
First, tighten the expansion pin nut only far
enough so that the expansion pin has no play and
light tension. Now tighten the bolt approx. 90
°
and
then continue to turn until the next slot fits into the
lock tooth. Secure the expansion pin nut to the
lock tooth.
10. Cutting ring joint in hydraulic lines
For all pre-assemblies as well as pre-assembled
cutting ring joint delivered from the factory, the
final assembly takes place in the accompanying,
well-oiled threaded connectors with a half-turn of
the union nut past the point of the clearly noticea-
ble increase in force.
Pre-assembly
Saw off the pipe at a right angle. Do not use a pipe
cutter! The tube wall would be cut then diagonally
and this leads to a great deal of burrs on the inside
and outside. Slightly trim (not file!) the inside and
outside of the pipe end and clean. If bends are
involved, the straight end must be at least 2x the
height of the union nut between the end and the
beginning of the bend. Push the union nut and the
cutting ring onto the pipe.
Press the pipe against the stop in the connector
and pull the union nut on until the cutting ring cat-
ches the pipe (the pipe is not to turn with it). This
can be felt by the increasing force. Tighten the
union nut ½ turn over the action point.
Check the cutting groove of the edge: A visible
upthrust must fill in the space in front of the cutting
edge. The cutting ring my still be turned but may
not be movable on in axial direction.
Final assembly:
Insert the pre-assembled pipe in the well-oiled
threaded connectors, tighten the union nut to the
point of noticeable force, and finally turn ½ times.
Repeated assembly:
After each loosening of the cutting ring joints, the
union nut is tightened again without additional
force.
Leaking cutting ring connection:
For a leaking connection, first of all the union nut
is to be loosened to the point that a little oil comes
out and then tightened again as directed.
11. Profile ring joints in hydraulic lines
For all pre-assemblies as well as pre-assembled
profile ring joints delivered from the factory, the
final assembly takes place in the accompanying,
well-oiled threaded connectors with a half-turn of
the union nut past the point of the clearly noticea-
ble increase in force.
Pre-assembly
Saw off the pipe at a right angle. Do not use a pipe
cutter! The tube wall would be cut diagonally and
this leads to a great deal of burrs on the inside and
outside. Lightly trim (not file!) the inside and out-
side of the pipe end and clean.
If bends are involved, the straight end must be at
least 2x the height of the union nut between the
end and the beginning of the bend. Push the
union nut and the profile ring onto the pipe. Press
the pipe against the stop in the connector and
tighten the union nut on until the profile ring cat-
ches the pipe (the pipe is not to turn with it). This
can be felt by the increasing force. Tighten the
union nut ½ turn over the action point.
Test the recess of the edge: A visible upthrust
must fill in the space in front of the profile ring
side. The profile ring can be moved however it is
not able to be shifted on-axis.
Final assembly:
Insert the pre-assembled pipe in the well-oiled
threaded connectors, tighten the union nut to the
point of noticeable force, and finally turn ½ times.
Important: Counterhold the threaded connec-
tors with a wrench!
Repeated assembly:
After each time the profile threading is loosened,
the union nut is to be tightened to the point of
noticeable resistance and then turned ½ times.
Important: Counterhold the threaded connec-
tors with a wrench!
Leaking profile ring joint:
For a leaking connection, first of all the union nut
is to be loosened to the point that a little oil comes
out and then tightened again as directed.
ATTENTION! Deviation in the torque reduces the
stated pressure output and the lifetime of the
threading. Leakage and slipping out of the pipe
will result.
12. Conical nipple threaded joints in the hydraulic
lines
Assembly:
Lubricate the O-ring on the conical nipple. Tighten
the union nut 1/3 turns to the point of clearly
noticeable resistance
.
Important: Counterhold the threaded connec-
tors with a wrench!
ATTENTION!
Deviation in the torque reduces the
stated pressure and the lifetime of the joint. Lea-
kage and slipping out of the threading will result.