Troubleshooting; Scrapping And Disposing Of The Pump - Bell HP250 AP Use And Maintenance Manual

7.5 - Troubleshooting

The following chart describes the main problems that could occur during operation of the pump, together with an indication of the ap-
propriate corrective action. If the prescribed action fails to solve the problem, contact the manufacturer.
PROBLEM
Pump cannot be started
Pump stops working under load
Pump operates but no pressurized oil is deli-
vered
Pump fails to reach maximum pressure
Pump delivers pressurized oil but load is not
lifted
The piston retracts even if actuator "B" is not
activated.
Piston fails to perform retract stroke (single
acting cylinder)
Piston fails to perform retract stroke (double
acting cylinder)
Pump flow rate insufficient

8 - SCRAPPING AND DISPOSING OF THE PUMP

If the pump is no longer required for duty, empty the oil and dispose of it in accordance with the law of your country.
The same procedure must be followed for other parts of the pump, in observance of the type of material (plastics or metal).
193551050 v.7 - UPD 30012020
POSSIBLE CAUSE
Compressed air line closed or clogged
Insufficient air pressure
Air filter dirty or clogged
Oil leak in the main hydraulic circuit
Pump internal leak
Low oil level
Insufficient air pressure
Relief valve incorrectly set
Oil leak in the main hydraulic circuit
Excess load
Oil circulation fault
Oil leak in the main hydraulic circuit
Pump internal fault
Oil pressure line obstructed or coupling incorrectly
connected
If piston is designed to return under gravity, ensure
load is sufficient.
Verify that actuator "B" is turned on.
Cylinder spring broken
Cylinder release valve not working
Oil pressure line obstructed or coupling incorrectly
connected
Cylinder release valve not working
Insufficient air pressure
Air filter dirty or clogged
Reservoir breather plug or screw not opened
CORRECTIVE ACTION
Check compressed air supply to pump
Verify that "A" (only in RC model) is receiving
compressed air
Check compressed air supply to pump is
between 5 and 8 bar
Clean or renew
Check the circuit for leaks and repair as
necessary
Check for leaks and return pump to manufac-
turer for repair
Check level and top up as necessary
Check compressed air supply to pump is
between 5 and 8 bar
Contact the manufacturer
Check the circuit for leaks and repair as
necessary
Reduce
Check if pipelines are obstructed or if cylinder
is working correctly
Check the circuit for leaks and repair as
necessary
Check for leaks and ask the manufacturer
Check oil pressure line
Increase load on cylinder
Supply power to actuator "B".
Repair
Repair cylinder
Check oil pressure line
Repair cylinder
Check compressed air supply to pump is
between 5 and 8 bar
Clean or renew
Open breather plug or screw as described
in chapter 5
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