KUHN GMD350, Operator'S Manual, Page: 69 / 100

Maintenance and storage
Disc mower
GMD350 - 350-FF
67
„ Hydro-pneumatic accumulator
The hydro-pneumatic accumulator does not require any
particular maintenance.
Regularly check the tightness of the accumulator
attachment on the hydraulic valve bank and that no oil
has leaked from the hydraulic circuit (a small oil leak can
change settings).
Depressurize the hydraulic circuit
Suspension hydraulic circuit:
- Stop the tractor engine.
- Shift the mowing unit lift cylinder directional control
valve in float position.
- Open valve (position (a)).
- Release pressure until the gauge needle reads 0.
- When the pressure reaches 0 bar (0 psi) bar on the
pressure gauge, close the valve (position b.
Pressurizing the hydraulic circuit
See section:
- ’’Pressurizing the hydraulic ground pressure circuit’’.
Before any work is carried out on a hydraulic
circuit with hydro-pneumatic accumulator,
depressurize the circuit.
It is strictly forbidden to weld, grind or drill
onto a hydro-pneumatic accumulator.
Hydraulic valve:
- Valve open (a) (Adjustment)
- Valve closed (b) (Work and transport)