PULLER-TENSIONER
Model: AFB506
Manual: MI-AFB506-149-00-GB
NOTE: when working in cold climates, heat the hydraulic oil by letting the engine idle
for 15 minutes and slightly closing the valves (table 1, pos. 24-26) till a pressure of 50
bars – 725 psi can be read on the manometers (table 1, pos. 23-25).
ONCE THE DIESEL ENGINE HAS BEEN STARTED, IT IS NECESSARY TO CONTROL THAT:
a. The pressure of the feeding circuits, shown on the manometers (table 1, pos. 31-37), must never
drop below 22 bars – 320 psi.
Otherwise, stop the machine and immediately contact the after-sales service of Tesmec S.p.A.
b. The hydraulic oil temperature, shown on the proper display page on the electronic multi-function
display (table 1, pos. 14), doesn’t exceed 70°C.
This is the maximum acceptable value for the hydraulic components in case the oil used is suitable
for these temperatures. If other kinds of oils are used, the maximum acceptable working
temperature depends on their characteristics in relation also with the viscosity limits imposed by the
hydraulic pumps and motors (see paragraph 2.12).
c. The clogging filters lamps (table 1, pos. 6-7-8) are not switched on when the oil is hot.
However, it may happen that the lights are switched on during the first phases of the work, when
the hydraulic oil is cold: it depends from the viscosity of the cold oil and not from the filters clogging.
In this case, wait for the lights to switch off before carrying out any maneuver.
The filters cartridges must be replaced only if the lights are switch on also when the oil is hot (about
50°C).
ATTENTION: when starting a cold machine, after preheating the hydraulic oil as
previously described, begin stringing operations limiting the maximum working
performances for at least the first 15 minutes, that means to keep at half accelerator the
Diesel rpm and don’t exceed the 30% of the maximum stringing speed.
ATTENTION: in case of high external temperature (>30°C), it is necessary, in case of
stoppages, to let the Diesel engine run with the radiator fan of the hydraulic oil engaged
at maximum speed (valve table 1, pos. 28 completely closed).
4.7 PULL CONTROL SETTING
The machine is equipped with two pull control devices for the control of the max. pull value on the line:
1. PULL LIMITING DEVICE that stops the machine when reaching the max. pull
2. PULL PROGRAMMING DEVICE that adjusts the bull-wheels rotation when reaching the pre-set
pull till the bull-wheels stop or reversal keeping the applied pull on the line.
4.7.1 PULL LIMITING DEVICE SETTING
With the suitable pawl, connected to the dynamometers (table 1, pos. 30-36), move the red arrow in
correspondence of the max. pulling value that has not to be exceeded.
When the pre-set pull value is reached, the machine stops automatically and the diesel engine turns
off while the negative brakes automatically connect with the consequent stop of the bull-wheels
rotation. When the pull value is exceeded the pilot lamp (table 1, pos. 9) on the control panel
switches on.
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