30
Check the entire hydraulic
system for oil leaks. (A007)
Check whether oil is leaking from the hydraulic assembly, hydraulic lines or
connections. Check whether all hydraulic connections are properly tightened
using a corresponding open ended spanner.
Lower the bollard and disconnect the 230 V supply. Check the correct oil level in
the hydraulic assembly with the bollard lowered using the sight glass. The oil
must fill the sight glass.
Fill up oil if the filling level is too low. (See SPECIFIC OPERATIONS – chpt. 10)
ATTENTION: Only use original oil as specified on the corresponding label.
ATTENTION – this check must be performed when the hydraulic pump is
“cold”
(not to be carried out after several consecutive movements which may
cause the oil heating in the hydraulic system).
Lower the bollard, then connect the pressure gauge with the pressure measuring
head in the hydraulic system.Command the rising and check whether the
pressure shown on the pressure gauge is between 10 and 15 bar. When the
bollard is rised, check whether the pressure rises to 35-45 bar; Check whether
the pressure stays at approx. 30bar after approx. 5 minutes. If the pressure is not
maintained or drops rapidly, check whether oil is leaking from the hydraulic
assembly or the solenoid valve. Read chapter 10: SPECIFIC OPERATIONS.
The hydraulic system is equipped with an hydraulic pressure switch which
analyzes the pressure in the system; when the bollard is rising and the pressure
switch detects a pressure increase (usually caused by the detection of a weight
corresponding to 40 kg or more on the bollard e.g: a person) the bollard stops
and goes back to down position. Check the proper functionality of the safety
reversal managed by the pressure switch using a sample weight (e.g: a barrel
filled with 40lt of water). Otherwise adjust or replace the pressure switch. Read
chapter 10: SPECIFIC OPERATIONS.
The hydraulic system is equipped with an hydraulic pressure switch which
analyzes the pressure in the system; when the bollard completes the rising, the
pressure switch detects an increase due to the moving cylinder in up position,
consequently the control unit ends its rising phase by stopping the operation of
the hydraulic pump. Check that once the moving cylinder stops in up position,
also the pressure switch makes the hydraulic pump stop in about 4s. Otherwise
adjust or replace the pressure switch. Read chapter 10: SPECIFIC
OPERATIONS.
Check the proper grip of screws and bolts by using the standard handling
equipment (hexagonal fix wrenches – Allen wrenches – screw drivers).
Check the oil level and fill up
the hydraulic assembly if
necessary. (A008)
Check of the pressure in the
hydraulic system. (A009)
Check of the safety reversal
managed by the pressure
switch when the bollard is
rising. (reversal caused by the
detection of approx. 40Kg on
the bollard). (A010)
ATTENTION: when bollards
are equipped with E.F.O circuit
the reversal function is not
enabled.
Check of the rising interruption
managed by the the pressure
switch. (A011)
Overall check of the proper
grip of the screws. (A012)
DPT280
UK