HYDRAULIC PULLER-TENSIONER PT1250
Manual: MI-PT1250-050-01-IT Date: 06.11.2017 Author: AT Page: 51 of 69
The machine is ready for working and automatically start to recover if the pull in the rope is less than that
of the puller or will begin to release braking if the kinks in the rope is greater than that of the puller. After
setting the pull with dedicated potentiometer, the engine stops or starts independently following the
movements of the machine antagonist.
ATTENTION: if the blue arrow reaches the red mark, the machine stops
automatically.
f. To stop the rotation of the bull-wheels, gently bring the lever (table 9, pos. 5) in the center position.
This operation has the negative brakes that cause the arrest of the bull-wheels.
NOTE: when situate the lever (tab. 9, pos. 5) to center the negative brakes
engage automatically.
ATTENTION: quickly move the lever (tab. 9, pos. 5) from the working position to
the central position of the neutral it is harmful to the risks of negative brakes
that have to endure at the time of their intervention to heavy load.
g. For the release of the rope lead position (up) the command lever (tab. 9, pos.5).
5.10 POINTS TO REMEMBER
a. The pressure of the feeding circuit (see par.5.5.2.3) must be higher than 25 bar: otherwise, the
stationary brakes will be damaged.
b. Adjust the pull of the reel elevators with hydraulic head at minimum indispensable value: otherwise,
the hydraulic oil will be uselessly heated and dangerous counter pulls may arise.
c. Before beginning the works, check the levels.
d. Respect the temperature limits for the hydraulic oil as indicated at paragraph 2.12
e. After an emergency intervention of the negative safety brake, verify the condition of the brake discs
(see paragraph 5.5.2.4).
f. It is strictly forbidden to wind on the bull-wheels ropes and/or conductors with a lower diameter in
succession of ropes and conductors with a larger diameter.
5.11 END OPERATIONS
At the end of the operations to download the tension of the cables / conductors using the control lever
(tab. 9, pos. 5). Afterwards turn off the engine by turning the ignition key.
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