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C
4. To start bending, shift the direction lever to
the working position and push the power switch
. The bending former will start to rotate. Main-
tain pressure on the switch until your chosen
angle of bend (marked on the bending former)
lines up with the mark on the bending shoe, and
then release the switch (see figure C).
The 764 is equipped with a device that allows
you to preset the bending angle between 0 to
180 degrees which is ideal for repeated bends.
See "preparation for start up" chapter.
5. Once the bend has been produced and the
power switch has been released, shift the direc-
tion lever back into the reverse position
briefly push the power switch to loosen the hold
on the tube. Once the tube has released you can
remove the fastening bolt, then the bending
shoe and finally take the finished bend out of
the bending former.
6. In order to make the ready for the next bend-
ing operation, start the motor with the direction
lever in the reverse position
and moves into the neutral position.
CARE AND MAINT ENA NCE
Before carrying out any job on the machine, dis-
connect the plug from the mains outlet.
1. Cable and plug
Both the cable and plug should be in optimum
condition. Check them at regular intervals.
2. ON switch
Check that the machine switch unblocks auto-
matically when finger pressure is released. In
case of any anomaly, replace immediately with
a new one.
3. Brushes
Check frequently for brush wear and perfect
contact with rotor. Change brushes when their
lengths is 1/3 of original length.
4. Motor and roto
The carbon dust accumulated in the motor and
brush housing should be removed every 100
B
90
D
20
. Now,
until it triggers off
E N G L I S H •
hours. The motor's rotor should be permanently
clean with a uniform surface (light bronze col-
our).
5. Gear box
Change grease every 500 operating hours. After
dismounting the machine, oil all mechanisms
to eliminate old grease. Remove parts with dry
compressed air and apply new grease with clean
hands. Do not use any dissolvents. Approximate-
ly 300 grs. of grease is needed for a correct lu-
brication. An excessive amount of grease is not
recommended as it can increase the temperature
of the machine. Grease type: LGMT2 by SKF or
similar. We recommend that this operation be
carried out by an authorized after-sales service.
6. Dismounting the gear box
Before dismounting the cover of the gear box,
never introduce sharp objects such as tips, screw-
drives, etc. between the body and cover con-
necting faces. The correct procedure is to tap
the front of the octagon gently with a plastic
hammer.
7. Machine maintenance and repair should be
done by a specialist
All repairs should be carried out by a specialist
and only original parts should be used.
DI AG NOSIS OF FAULTS
Before carrying out any inspection of the 764,
check that the plug is disconnected from the
power supply.
IMPORTANT: should any form of service/repair
other than the basic points detailed below be
required, please contact your nearest technical
service centre.
A.The bending former stops rotation during
bending, while the motor is still running.
The direction lever is not in the right position.
There is a transmission problem ñ contact your
technical service centre.
B. Bends are not round/circular
Bending former and/or shoe are not suited to the
tube size.
Bending former and/or shoe are worn out.
Tube quality is suspect.
C. The 764 does not start
Check the wiring in the plug.
Carbon brushes may be worn out and need re-
placing.
D. Pre-set trigger does not function
Screws are not tightened properly
U se r's m a nua l
7
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