Komatsu Galeo BR380JG-1E0 Shop Manual page 141

10 Structure, function and maintenance standard
Travel junction valve
1. When pilot pressure is turned ON
Function
This valve connects the L.H. and R.H. travel
q
circuits through travel junction valve so that the
hydraulic oil will be supplied evenly to both
travel motors to improve machine's straight
travel performance.
When the machine is steered, outside pilot
q
pressure (PST) closes the travel junction valve
to improve steering performance.
BR380JG-1E0
Operation
Pilot pressure from the travel junction solenoid
q
valve contracts spring (1), and travel junction
spool (2) moves to the left to the stroke end.
Junction circuit between port (PTL) (L.H. travel
q
circuit) and port (PTR) (R.H. travel circuit) is
closed.
SEN01352-00
1
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