PULLER-TENSIONER
Model: AFB506
Manual: MI-AFB506-149-00-GB
4.10 USE OF THE MACHINE WITH INDEPENDENT BULL-WHEELS (1-2)
a. Check if the coupling pin of the bull-wheels (table 4, pos. 1) is disengaged.
If not, disengage the pin by removing the little covers and using the proper key.
b. Set the selector (table 1, pos. 42) to "INDEPENDENT BULL-
WHEELS" position (leftwards).
c. Speed up the Diesel engine by the accelerator (table 1, pos.
18) till a maximum of 2400 rpm.
d. Adjust the hydraulic oil radiator by the valve (table 1, pos. 28).
e. Move the levers (table 1, pos. 34-40) to position
(downwards) to set the pull value on each bull-wheel and the
recovery or release speed of the rope.
NOTE: this way, the bull-wheels are completely independent; it is possible to control
two independent ropes, each one with a max. pull of 45 kN – 10116 lb.
Now the machine is ready for working automatically: each independent circuit can detect if the rope
tension is lower than the pre-set one (therefore it starts recovering) or if it is higher than the pre-set
one (therefore it starts braking while stringing).
Pull values can be read on the two scales engraved on the ring
nut of each dynamometer (table 1, pos. 30-36).
NOTE: vacuum brakes engage automatically when the levers (table 1, pos. 34-40) are
moved to central position.
WARNING: do not move the levers (table 1, pos. 34-40) fast from working position to
central neutral position. This operation could damage the negative safety brakes discs
that have to bear a heavy load.
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