Takeuchi TB285 Operator's Manual page 272

Hydraulic excavator
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OPTIONS
operating lever Switch kit 1
Operating
Press those buttons to control the flow of the
oil in the first/second auxiliary hydraulic lines.
(A) .......Hydraulic oil flows to left auxiliary line
(a).
(B) ......Hydraulic oil flows to right auxiliary line
(b).
(C) ......Hydraulic oil flows to left auxiliary line
(c).
(D) ......Hydraulic oil flows to right auxiliary line
(d).
Refer to "Auxiliary hydraulic lines" on page
2-46.
Releasing the residual pressure
After the auxiliary hydraulic circuits have
been used, pressure remains in the circuits.
This is called the residual pressure. Release
this residual pressure before disconnecting
the lines.
Perform the residual pressure releasing
within 30 minutes after the engine stopping.
1. Park the machine on a flat, rigid and safe
ground.
2. Stop the engine.
3. Lower the safety lock lever to the
unlocked position.
4. Turn the starter switch to the ON position.
5. Press the auxiliary hydraulic switches
several times to release the residual
pressure in the auxiliary hydraulic circuitry.
8-16

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