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Problem
1
The cylinder lowers.
The hydraulic system
is too hot.
There is noise in the
hydraulic system.
The hydraulic oil has
different color.
The remote control
does not start.
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
Cause
There is a contamination in the hydraulic sys-
tem.
There is a leakage in the cylinder.
There is a fault in the counterbalance valve.
The pilot control valve or the spool in the pilot
control valve is defective.
The hydraulic oil cooler is blocked or clog-
ged.
The cooling fan do not rotate or is defective.
The ambient temperature is too high.
A hose or a quick coupling is defective.
The maximum pressure or standby pressure
in the pump is too high.
The main pipe or the pipe to the tool is
blocked.
The power consumption is too high because
of operation with defective or incorrect tool.
The hydraulic pump is defective.
Not sufficient hydraulic oil in the hydraulic oil
tank.
There is air in the hydraulic oil.
The hydraulic pump is defective.
If the hydraulic oil is grey, there is water in
the hydraulic system.
If the hydraulic oil is black, there is carbon
formation in the hydraulic system because of
too high operation temperature.
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 .
fer to
Solution
Examine the hydraulic system for leaks.
Change the hydraulic oil and the hydraulic oil
filter if it is necessary.
Find the leak and replace the defective com-
ponents.
Speak to an approved service agent.
Speak to an approved service agent.
Clean the hydraulic oil cooler.
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.
Use external equipment to cool the product.
Replace the damaged component.
Speak to an approved service agent.
Replace the damaged component.
Make sure that the tool pressure and flow are
compatible with the product.
Speak to an approved service agent.
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.
Operate the product with no load until the air
and the oil are separated.
Speak to an approved service agent.
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.
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.
Connect the batteries to a charger.
93
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