Flow Of Oil In Bucket Dumping Operation - Kubota K008-3 Workshop Manual

d. Flow of oil in bucket dumping operation
1. Hydraulic oil running from the pilot pump flows through the relief valve and manifold up to the P port of
the right pilot valve.
(Refer to the flow of oil at the times when the control lever lock is locked and when it is unlocked as
explained in 1 and 2.)
2. When the bucket dumping operation is performed, hydraulic oil passes through the P port of the right
pilot valve, A1 port, and the A5 port of the manifold (1) and flows from the A port to the pilot port of the A9
section side of the control valve.
3. When the pressure at the A9 section side increases, the main spool starts to move and oil at the A9 sec-
tion side is pressed out and passes through the F port of the manifold (2), A7 port, and the A3 port of the
right pilot valve and T port, and then returns to the tank from the T3 port of the manifold (1) through the
return passage (2) of the manifold (2), T2 port, the T1 port of the relief valve and the T port.
4. When oil at the B9 section side is depleted, the main spool is completely changed over to boom lifting
side to dump the bucket.
5. The flow of oil in bucket raking operation is reverse to that of bucket dumping operation.
IV-M-38
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