KUHN GMD883 - Page 82

Disc mower
80
GMD883
Trouble shooting guide
Adjusting the hydro-pneumatic
accumulator pressure on the
move is not possible.
The suspension circuit valve is
closed.
Open the suspension circuit
valve.
Excessive noise caused by a
control or check valve.
Faulty valve.
Replace the faulty component
if necessary.
The oil level in the tractor tank
is insufficient to supply the
whole hydraulic circuit.
Check oil level and top up if
necessary.
Control box switches have no
effect on the cylinders
The control box is not
energized.
Energize control box using
ON/OFF switch
The tractor valve does not
supply oil.
Take hose in hand and feel if oil
flows continuously.
The electric wiring harness is
incorrectly connected and
does not supply the control
valves in 12 V.
One switch on the control box
has no effect on the
corresponding cylinder.
There is a faulty connection of
the valve connectors.
The corresponding valve is
defective.
The check valve located
underneath the control valve is
faulty or blocked.
If the control valve is
operational, the check valve is
probably defective. Replace it if
necessary.