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Message: <blockquote data-quote="Land-Tech" data-source="post: 22779" data-attributes="member: 1679">One rocker activates a parking break, one unlocks your hyd . When the light flashes, does the machine react in any way?The brakes will come on if you lose hydralic pressure or power to the manifold valve. When the rocker is green, it energizes solenoid valve which allows flow through the manifold to actuators in the chain case. The brakes aren't friction but are metal dogs that rotate in and out of slots in a disk behind the drive sprocket in the chain case. Pressurize the actuator and it pulls the dog away from the disk. Relieve the pressure and the brakes are locked.I'm thinking if you get no reaction when the light flashes maybe it is just a bad light in the rocker and it may be separate from the energizing circuit to the solenoid.I'm not sure that the rocker works that way. My rocker show orange when not energized and green when it is. Scott</blockquote>