34
DPT260
Maximum rising pressure
adjustment. (B008)
Adjustment/replacement of the
safety pressure switch. (B007)
ATTENTION: before proceding check that the hydraulic unit is cold
(not
after having performed several consecutive movements which cause oil heating
inside the hydraulic system).
• When the bollard is in down position, connect the pressure gauge to the
pressure outlet (in old models, prior to 2008, there is no pressure outlet so it is
not possible to adjust the pressure).
• Move the bollard to up position, then check that the pressure is included in a
range between 35 and 45bar for standard models and from 40 to 45 for the
ones equipped with E.F.O circuit.
ATTENTION: before proceding check that the hydraulic unit is cold
(not
after having performed several consecutive movements which cause the oil
heating inside the hydraulic system).
Generally old pressure switches are adjustable and they are recognizable from a
waterproof protection made of black soft rubber; the current pressure switches
are pre-adjusted and hermetic to increase the IP grade of protection. In case of
malfunction, if the pressure switch is pre-adjusted and hermetic it is necessary to
replace it, if it is adjustable follow the procedure below:
• Bollard out of the pit – Bollard in down position – turn 230V power supply off.
• Extract the waterproof protection (made of black soft rubber) for about 5cm
to reach the adjusting screw.
• Unscrew and remove the nylon white screw (placed in the middle of the two
electrical wires) to reach the adjusting screw.
• The adjusting screw must be turned clockwise to decrease the sensitivity of the
pressure switch or counterclockwise to increase it; the procedure below is
referred to the necessity to reduce the sensitivity of a pressure switch (ie. The
bollard goes down even when only 10kg weight is on the head).
• Turn the adjusting screw clockwise in steps of 30°.
• Place a sample weight of 40kg on bollard's head.
• After having performed the first adjustment, make bollard rise; if after approx.
10cm the bollard stops and returns in down position, perform another
adjustment then rise the bollard (repeat this procedure until the bollard rises
completely).
• Once the bollard is at about 70% of the rising, push lightly and check that it
stops and returns down; whether to stop it is necessary to apply a strong
pressure, adjust in steps of 15 ° counterclockwise and check again (if it is
necessary perform other adjustments until the bollard stops and returns down
by opposing a light pressure).
• Fasten the nylon screw and the waterproof protection made of black soft
rubber.
• Lay the bollard in the pit and check the correct operation.
UK
CONTINUES NEXT PAGE
