Barko 830B, Руководство по обслуживанию

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60-36 ®
SERVICE- HYD PUMP T6, T7 VANE
(continued...)
3. TROUBLESHOOTING
3.
4.
5.
No pressure
Not enough pressure
Uncommon noise level
a) Is the hydraulic circuit
correctly designed?
b) Is the circuit correctly
piped?
a) Is the noise coming
from the pump?
b) Is the noise coming
from the surroundings?
b) Is the system well
dimensioned?
c) Is there an internal
leakage somewhere that
maintains a certain
pressure?
a) Check as when "no
pressure" 3.
c) Are the components
working properly?
b-5) Check the balancing of the E motor.
b-7) Check the filtration unit, its capacity and if the noise
does not come from the opened by-pass valve.
c-3) Check if in the directional valves the spools are not
sticking in a position that brings the flow back to the tank.
c-1) Check all the possible faulty components, from the
pump to all the receptors and intermediates (high pressure
seals, mechanical wear...).
a-4) Check if the hose strain force does not create this
noise.
b-1) Compare the schematic to the piped circuit.
c-1) Check the main sequences. Doing so, you will check
if all the valves are set or work properly.
b-1) Check if the flow required is not over the available
flow and therefore cannot build-up pressure.
a-1) Check the hydraulic circuit schematic.
a-8) Check if the inlet pipe is under the oil level.
b-2) Check the pressure piping and see if its length dumps
or amplifies the noise.
b-4) Check the E motor fan.
a-2) Check if the air bleed has been done correctly.
a-1) Check the mechanical link of the pump shaft :
alignment, balancing of the coupling or Universal joint, key
properly fastened...
a-9) Check if the air filter is not clogged or too small.
a-5) Check if the oil level is correct.
a-6) Check if the oil in the tank is not aerated.
a-10) Check if the speed is not incompatible with the
catalog values.
a-12) Check if the inlet pressure is not higher than the
outlet pressure.
c-2) Check if the main relief valve is not set at an
extremely low pressure and therefore bringing all the flow
back to the tank.
a-3) Check if there is no air intake from the tank to the
pump (nor through the shaft seal).
a-7) Check if the strainer is not clogged or under-
dimensioned.
a-11) Check if the oil is compatible with the catalog
recommendations.
b-1) Check the hoses and see if the noise in not coming
back to the pump this way.
b-3) Check if the structure of the tank is stiff enough to
avoid amplification / resonance.
b-6) Check the water cooler and its theoretical limits.
06/05/2019
Updated
SERVICE