Rothenberger ROGROOVER 1 - 12 Instrucciones De Uso página 27

Symptom
The groove zigzags
The groove is not parallel to
the surface of the tube end
The groove diameter is not
uniform throughout the
entire circumference of the
tube
The countersinking at the
end of the tube is too large
The tube slides or slips in
the lathe screw
The tube is coming out
There is no pressure in the
hydraulic cylinder When
actuating the pump handle
nothing happens
The piston advances when
actuating the cylinder handle
however recedes when
releasing the handle
Insufficient hydraulic cylinder
pressure
Possible Reason
The tube has not been cut
square
The tube is elliptic
The roller set does not
correspond to the tube
diameter
The deviation angle of the
tube is too large
The tube support is too large
The operator is making the
upper roller advance too
rapidly
The lathe screw fluting is
blocked by metal, worn or
flat
The upper roller is advanc-
ing very slowly
Inappropriate direction and
height of the tube support
Rough surface of the steel
tube
Insufficient hydraulic oil
Dirty oil is blocking the
orifice
Oil is leaking from the valve
Dirty oil is blocking the
orifice
Oil is leaking from the valve
Oil is leaking from another
point
The relief valve spring is
broken
ENGLISH
Solution
Cut the tube square
Use a circular tube
Replace the roller set for
one which corresponds to
the tube diameter
Adjust the tube deviation to
0
Adjust the tube support
height to obtain a deviation
in degrees below the hori-
zontal plane
Reduce the pumping speed
(refer to the relevant operat-
ing instructions)
Clean or replace the lathe
screw
Make the upper roller ad-
vance more rapidly inside
the tube
Vary the direction and height
of the tube support
Polish the surfaces
Add hydraulic oil
Replace the hydraulic oil
and clean the circuit
Remove the screw and
springGently hit the small
steel ball to make it come
out
Replace the hydraulic oil
Remove the screw and
spring Gently hit the small
steel ball to make it come
out
Locate the problem and
correct
Replace the safety valve
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