jcb JS200 Service Manual page 153

Section C
5 - 19
Swing Brake Swing Lock (continued)
(2) Swing Lock (Swing Lock Switch ON, 100% Brake)
Swing
lever
OFF
When the swing lock switch is turned on
a. 24 V is output to the swing shut off solenoid (SOL:3) and the solenoid valve shifts. Pilot pressure enters both ends of the
swing section of the control valve, and the pilot pressure is then shut off instantly (spool of control V does not move).
b. After 5 seconds, 24V is output to the swing lock solenoid valve (SOL: 1) and the solenoid valve shifts. Oil within the brake
piston of the motor flows to the tank. The brake locks by torque at 100%.
c. Also 24V is output on the swing brake solenoid valve (SOL; 2) and the solenoid valve shifts.
9803/6400
Electrics
Pump Control
Swing lock SOL:1
SW 100% lock
5 sec. after lever
ON
in neutral
ON
SOL: 2
50% SOL: 3
brake Shut off
ON ON
Section C
Monitor
( P )
( P )
5 - 19
Issue 1