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TJ
7.2
The plunger is not, or only partly, extended
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7.3
The plunger extends with jerks
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7.4
The plunger extends more slowly than usual
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7.5
The plunger extends, but does not retain pressure
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Possible cause
Solution
The pressure relief valve on the pump is in the
"neutral" position.
Set the pressure relief valve on the pump in the
"operation" position.
The couplings are not connected correctly.
Correctly connect the couplings.
The oil level in the pump is too low.
If necessary add hydraulic oil. Use a pump that
can deliver more oil volume.
The connected pump does not work.
Inspect the pump.
The load is too heavy for the cylinder.
Use a cylinder with a tonnage that is higher than
the load.
The plunger is jammed inside the cylinder.
Have the cylinder repaired by a Holmatro
Certified Technician.
Possible cause
Solution
There is air in the system.
Vent the cylinder. Refer to section 8.4.5.
The plunger is jammed inside the cylinder.
Have the cylinder repaired by a Holmatro
Certified Technician.
Possible cause
Solution
One of the joints leaks.
Have the cylinder repaired by a Holmatro
Certified Technician.
The couplings are not connected correctly.
Correctly connect the couplings.
Possible cause
Solution
The system is not arranged correctly.
Re-arrange the system. Make sure that all
components are specified for the load.
The connected pump does not work.
Inspect the pump.
One or more of the seals inside the cylinder
leaks.
Have the cylinder repaired by a Holmatro
Certified Technician.
One of the joints leaks.