Return Change Valve For Direct Return Flow - Kubota U17-3a Operating Instructions Manual

Return change valve for direct return flow

The change valve has two settings.
When "direct return flow" (3) is enabled, the return flow is directed
from the attachment to the hydraulic oil tank via the return filter. The
return flow only occurs via the right auxiliary port connector on the
arm.
The "direct return flow" switch position is used for
hammering attachments, such as a hydraulic ham-
mer.
Swivel the lever (1) clockwise up to the stop.
The direct return flow is enabled.
When "indirect return flow" (2) is enabled, the return flow is directed
from the attachment 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 auxiliary port connector (according to the position of the aux-
iliary port pedal) of the arm.
The "indirect return flow" switch position is used for rotating attachments, such as a rotary gripper,
an auger, etc.
Swivel the lever (1) anticlockwise up to the stop.
The indirect return flow is enabled.
Move the return change valve to the required position as shown in the figure, depending on the action of the at-
tachment being used (rotary 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.
86
2 3
Operation
1
W9232-8135-6
12/2015