5 - 17
Section C
Electrics
9803/6400
Section C
5 - 17
Issue 1
Pump Control
Swing Brake/Swing Lock
(1) Swing Brake
1) Engine is running and swing lever is in neutral (50% brake).
24V is output to the swing brake solenoid valve (SOL:2), the pilot pressure which ran through the pressure reducing valve
enters the swing motor, and operates with a braking force of 50%.
SOL: 2
Swing Swing lock SOL:1 50% SOL: 3 Monitor
lever SW 100% lock brake Shut off ( P )
OFF OFF OFF
ON OFF
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