Circuit Function - Neutral Position - Kubota KX080-3 Workshop Manual

WSM KX080-3 Mechanism
f. Circuit function
1. Newtral position
When the spool stays neutral (with no pilot pressure applied), the poppet seat (a), spool seat (b), sliding
spool seal (c) and relief valve poppet seat (d) all serve to stop a leak from the cylinder. In this way, the cylin-
der is prevented against gravity fall.
(c)
(d)
(4)
(b)
(2)
(a) Poppet seat
(b) Spool seat
(c) Sliding sleeve seal
(d) Relief valve poppet seat
Fig. 1 Spool at neutral position
IV-M-115
IV Hydraulic System
(3)-1
(3)-2
(1)
B port
(a) A port