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Problem
Cause
Solution
The cylinder lowers.
1
There is a contamination in the hydraulic sys-
tem.
Examine the hydraulic system for leaks.
Change the hydraulic oil and the hydraulic oil
filter if it is necessary.
There is a leakage in the cylinder.
Find the leak and replace the defective com-
ponents.
There is a fault in the counterbalance valve.
Speak to an approved service agent.
The pilot control valve or the spool in the pilot
control valve is defective.
Speak to an approved service agent.
The hydraulic system
is too hot.
The hydraulic oil cooler is blocked or clog-
ged.
Clean the hydraulic oil cooler.
The cooling fan do not rotate or is defective.
Do a check of the cooling fan in the electrical
enclosure.
Do a check of the blades of the cooling fan.
Replace the cooling fan if it is damaged.
The ambient temperature is too high.
Use external equipment to cool the product.
A hose or a quick coupling is defective.
Replace the damaged component.
The maximum pressure or standby pressure
in the pump is too high.
Speak to an approved service agent.
The main pipe or the pipe to the tool is
blocked.
Replace the damaged component.
The power consumption is too high because
of operation with defective or incorrect tool.
Make sure that the tool pressure and flow are
compatible with the product.
The hydraulic pump is defective.
Speak to an approved service agent.
There is noise in the
hydraulic system.
Not sufficient hydraulic oil in the hydraulic oil
tank.
Stop the product immediately. Examine the
hydraulic system for leaks. Replace with new
parts if it is necessary. Fill the hydraulic oil
tank with hydraulic oil.
There is air in the hydraulic oil.
Operate the product with no load until the air
and the oil are separated.
The hydraulic pump is defective.
Speak to an approved service agent.
The hydraulic oil has
different color.
If the hydraulic oil is grey, there is water in
the hydraulic system.
Examine where the water enters the hydraul-
ic system. If it is necessary, replace dam-
aged components. Replace the hydraulic oil
and the hydraulic oil filter.
If the hydraulic oil is black, there is carbon
formation in the hydraulic system because of
too high operation temperature.
Find the cause for the too hot operation tem-
perature. Replace damaged components if it
is necessary. Replace the hydraulic oil and
the hydraulic oil filter.
The remote control
does not start.
The remote control batteries are not charged. Charge the remote control batteries.
The batteries are in transportation mode. Re-
Remote control batteries on page 88
.
Connect the batteries to a charger.
1
Cylinder 3 and 4 do not have counterbalance valves. It is usual that cylinder 3 and 4 slowly lowers approxi-
mately 1 cm/min or 0.39 in/min.
1401 - 002 - 15.10.2021
93