Return Change Valve For Direct Return Flow; Pressure Relief Of The Hydraulic System - Kubota KX015-4 Operating Instructions Manual

Operation

Return change valve for direct return flow

The change valve (1) has two switch positions.
When "direct return flow" is enabled, the return flow is directed from
the implement to the hydraulic oil tank via the return filter. The return
flow in only via the right auxiliary port connector at the arm.
When "indirect return flow" is enabled, the return flow is directed
from the implement to the return filter via the control valve and then
to the hydraulic oil tank. In this case, return flow can be via the left
or right connectors (according to the position of the auxiliary port
pedal and/or the rocker switch auxiliary port) of the arm.
Move the return change valve to the required position as shown in
the figure, depending on the action of the implement being used (ro-
tary or breaking).
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!
STOP
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!
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.
3 4
2
1
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