ROTHENBERGER ROGROOVER 2 - 12 - Manual (Page 34)

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