Komatsu Galeo BR380JG-1E0 Shop Manual page 166

SEN01353-00
3) When steered or pivot-turned
a The Illustration shows the circuit for travelling left forward (slow) and right forward (fast) operation.
If the operation quantities of both levers are dif-
q
ferent from each other as in the steering opera-
tion (if the difference of the pilot pressure
between both sides is higher than a certain
level), the pilot pressure is output as the steer-
ing signal.
The pressure in left spring chamber (k) of
q
steering signal spool (j) is (P2).
The pressure in right spring chamber (l) is (P4).
q
When the pressure state reaches [(P4 – P2) x
q
(Spool section) > Spring set load], the spool is
switched to the direction of the arrow.
24
10 Structure, function and maintenance standard
Port (P4) pressure of the L.H. or R.H. PPC
q
valves, whichever having a higher output pres-
sure, is output to port (P6) as the steering sig-
nal.
BR380JG-1E0