Rothenberger ROBULL 2 Instrucciones De Uso página 10

The angles we can effect with these benders range from 0º to 180º. A right angle can be made
directly, while others can be effected with several curves.
These angles can be in different planes. The equipment could be hand operated or electrically,
with automatic, piston return.
3.1 Starting up and using the two-plate pipe bender
 Fit the guide plates to the front flange and secure them with pins.
 Fit the diabolos to the lower plate, in the position corresponding to the size of the pipe to be
bent. At the same time fit the diabolo in position in accordance with the size of the pipe.
 At the end of the piston, fit the former corresponding to the size of the pipe that it is desired
to bend. Place the pipe in position and put down the upper plate.
 In the event that the pipe to be bent is welded, the weld beam should be placed either in the
upper or lower side position.
 Before starting to use the pipe bender, release any pressure there may be in the valve sys-
tem of the hydraulic circuit. Do this by opening the return cock and pumping several times
with the lever or switch on the motor.
 Make sure the return valve is well closed, and the tank plug open.
 You can then begin to operate the pump lever or switch on the motor.
 When the bend has been finished, return the piston by loosening the return valve on the side
of the
 distributor.
4 Care and Maintenance
Check oil level at regular intervals.
When topping up, be especially sure to filter the oil so that it is free of extraneous matter. Check
its level by lifting the front part of the unit about 45º and looking in. The oil should reach the level
of the hole used for loading it in.
When the oil has been topped up, fit the unit in inclined position, i.e. almost vertical, and with the
piston upward. Open the return valve and work the pump with the lever until suction is as it
should be. After a short space of time with the position unchanged, and when suction is satisfac-
tory, fit in horizontal working position.
In the event that it is necessary to top up, use a high-quality hydraulic oil. Never use brake fluid.
Bear in mind that excess of oil will render the equipment inoperative. Accordingly fill to about
70% of tank capacity (1250 cc), first removing the cap.
Close the tank plug for transportation.
5 Troubleshooting
Symptom
The piston fails to advance
The piston advances only
in the absence of load
The piston stops before
reaching the end of its
stroke
8
Possible Reason
Insufficient oil
Return valve not closed
Air in the system (pump)
Return valve is poorly closed Close the return valve
There is a foreign body in the
intake valve
Very low oil level
Tank plug closed
ENGLISH
Solution
Check oil level
Close return valve
Open the return valve and oper-
ate the pump lever until the air is
released. To do this, position the
unit with the piston upward, so
that the oil will descend to the
distributor
Disassemble the intake valve and
clean it thoroughly, first having
made the piston return
Top up the oil
Open the tank plug