Pressure relief of the hydraulic system. Kubota U27-4

Operation

Move the return change valve to the required position as shown in the figure, depending on the action of the implement being used (rotary or breaking).

STOP

If the change valve is in position "direct return flow", although an attachment with indirect return flow has been mounted, the return flow to the hydraulic tank remains open!

This can lead to sudden movements or falling down of the attachment, even if the machine has been switched off.

- Make sure that the change valve is switched according to the attachment.

Pressure relief of the hydraulic system

 Lower front attachments and dozer completely.

 Turn the starter switch to the STOP position.

 Wait until the engine has come to a standstill.

 Turn the starter switch to the RUN position.

Do not start the engine!

4

3

 Lower the left control console (1) and make sure that the control lever lock (2) engages.

 Move control levers (3 and 4) several times to limit stop in all directions.

The hydraulic system is pressure relieved.

2 1

Placing out of operation

STOP

Park the excavator in such a way that it can not move and is secured against unauthorised use.

 Drive the excavator onto level ground.





Extend the hydraulic cylinders as follows:

Boom: Half-extended

Arm: Half-extended

Bucket:

Dozer:

Swing mechanism:

Half-extended

Lowered to the ground

Front attachments lowered centrally to the ground

Stop the engine (page 72).

 Remove the key.

 Unbuckle the seat belt and lift the left control console.



Refuel the excavator, if necessary (page 97).

 Close and lock the cab door. The key must remain with the operator.

RH418-8135-3

07/2015

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