Problem
Cause
Solution
The motor operates
but the hydraulic
functions have no
power or do not oper-
ate.
There is not sufficient hydraulic oil in the hy-
draulic oil tank. There is noise from the hy-
draulic pump.
Stop the product immediately. Do a check for
leaks in the hydraulic system. Replace parts
with new parts if it is necessary. Fill the hy-
draulic oil tank with hydraulic oil.
The circulation valve is continuously open.
Do a check of the diode on the valve cap at
the bottom of valve block 1. If the circulation
valve is open, the diode does not light up. Do
a check of the cable to the control module.
The standby pressure is too low.
Speak to an approved service agent.
There is a fault in the pump regulator.
Speak to an approved service agent.
The arm system
movements and tool
function operates
slowly.
The knob for adjustment of the tool speed
and/or the knob for adjustment of the product
speed is turned counterclockwise.
Turn the knob for adjustment of the tool
speed and/or the knob for adjustment of the
product speed clockwise.
The standby pressure is too low.
Start the remote control. Do not use the con-
trols on the remote control. Do a check of the
standby pressure on the remote control dis-
play. The pressure must be 20±1 bar/
290±14.5 psi. If the pressure value is differ-
ent, adjust the pressure.
A function on the
product operates
slowly.
There is internal leakage in the cylinder.
Extend the cylinder to its end position without
load. Do a check of the pump pressure in the
remote control display. The pump must oper-
ate at maximum pressure. If the pump does
not operate at maximum pressure, speak to
an approved service agent.
The hydraulic hose is blocked.
Operate the cylinder without load. Do a
check of the pump pressure in the remote
control display. If you get maximum pressure
but not full speed on the cylinder, the hy-
draulic hose is blocked. Replace the hydraul-
ic hose.
There is a fault in the pilot control valve.
Speak to an approved service agent.
A function on the
product does not
work.
A joystick is not in a neutral position when
you start the remote control.
Start the remote control again with the joy-
sticks in neutral position.
There is a fault in the pilot control valve or
the spool in the pilot control valve is blocked
or damaged.
Speak to an approved service agent.
The product lowers
on the outriggers.
There is leakage in the check valves in the
outrigger cylinders.
Speak to an approved service agent.
The arm system
makes an irregular
movements.
The product/hydraulic oil is too cold.
Let the product become warm.
There is air in the pilot control valve.
Operate the product with no load until the air
and the oil are separated.
The pilot control valve or the spool in the pilot
control valve is defective because of contam-
ination.
Speak to an approved service agent.
There are broken O-rings in the pilot control
valves.
Speak to an approved service agent.
There is a fault in the pilot pressure circuit.
Speak to an approved service agent.
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1401 - 002 - 15.10.2021
