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FJR Motorcycle Forums
Technical & Mechanical Problems
Rear brakes
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<blockquote data-quote="Fred W" data-source="post: 995410" data-attributes="member: 3828"><p>OK, so what happened is that when you loosened the hose from the master and pumped the pedal you purged any air from the line. Now when you attempt to push the pedal it is hydraulically locked. There is something blocking the flow inside the ABS Hydraulic unit, but just in the rear brake circuit.</p><p></p><p>Here's the diagram of the 1st Gen ABS</p><p></p><p><img src="https://i916.photobucket.com/albums/ad4/FJWinNH/Yamaha%20FJR1300/ABSHydraulicUnit.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>It's pretty much got to be item #6 - The Hydraulic control valve, and it must be stuck in the actuated position, which is where it goes instantaneously when it detects wheel slip. The block really can't be disassembled or repaired. You could try to activate the solenoid a few times and see if it will come loose, but I would think that you are going to need a new Hydraulic unit.</p><p></p><p>BTW - There have been some others who have had this valve stick on them, but it has always been in the default position, where you still get normal braking but no ABS action. You seem to be the first who has had one stick in the closed position.</p></blockquote><p></p>
[QUOTE="Fred W, post: 995410, member: 3828"] OK, so what happened is that when you loosened the hose from the master and pumped the pedal you purged any air from the line. Now when you attempt to push the pedal it is hydraulically locked. There is something blocking the flow inside the ABS Hydraulic unit, but just in the rear brake circuit. Here's the diagram of the 1st Gen ABS [IMG]https://i916.photobucket.com/albums/ad4/FJWinNH/Yamaha%20FJR1300/ABSHydraulicUnit.jpg[/IMG] It's pretty much got to be item #6 - The Hydraulic control valve, and it must be stuck in the actuated position, which is where it goes instantaneously when it detects wheel slip. The block really can't be disassembled or repaired. You could try to activate the solenoid a few times and see if it will come loose, but I would think that you are going to need a new Hydraulic unit. BTW - There have been some others who have had this valve stick on them, but it has always been in the default position, where you still get normal braking but no ABS action. You seem to be the first who has had one stick in the closed position. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Rear brakes
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