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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Aux hydraulics not locking in
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<blockquote data-quote="bobbie-g" data-source="post: 2566" data-attributes="member: 26"><p>Skidder, I have a 751 which works (as near as I can remember) exactly like Ken explained it. On the second press of the aux hyd button, two green lights come on. Then, a momentary pull on the right trigger will start the hyd flow to the aux lines on the lift arms. I can't remember if another pull on the trigger stops it, or if the aux hyd button has to be pushed a third time. My 751 has the BICS (Bobcat Interlock Control System) with the display panel with about 5 leds, located back to the right behind the operator seat. --- Now, how to trouble shoot: Just a few guesses. Since you note that the aux hyd button is having an effect, I would assume the switch itself is probably working OK. And on mine, I had a bad seat interlock at one time that would not let hyd flow to the main drive motors, but I really don't think this is your problem, since 1) the machine would not drive if this were the issue, and 2) the system is designed to put flow to the aux hyd output on the lift arms without someone in the seat, just so a backhoe could be run. I would make sure all the lights on your BICS panel (assuming you have such a thing) seem to be working correctly (obviously the bar and seat light won't be on if you're not seated with the lap bar down). The other simple thing to check is just to raise the cab and poke around gently at the wiring harness under the cab. My 751 connectors are very well made and seem really keep out the dirt and moisture, so that is not an obvious thing to check. --- Seems to me from what you described that this most likely is a wiring or control problem, and most likely has nothing to do with the hydraulic system itself (pump, motors, etc). Just my two cents worth. --- Bob</p></blockquote><p></p>
[QUOTE="bobbie-g, post: 2566, member: 26"] Skidder, I have a 751 which works (as near as I can remember) exactly like Ken explained it. On the second press of the aux hyd button, two green lights come on. Then, a momentary pull on the right trigger will start the hyd flow to the aux lines on the lift arms. I can't remember if another pull on the trigger stops it, or if the aux hyd button has to be pushed a third time. My 751 has the BICS (Bobcat Interlock Control System) with the display panel with about 5 leds, located back to the right behind the operator seat. --- Now, how to trouble shoot: Just a few guesses. Since you note that the aux hyd button is having an effect, I would assume the switch itself is probably working OK. And on mine, I had a bad seat interlock at one time that would not let hyd flow to the main drive motors, but I really don't think this is your problem, since 1) the machine would not drive if this were the issue, and 2) the system is designed to put flow to the aux hyd output on the lift arms without someone in the seat, just so a backhoe could be run. I would make sure all the lights on your BICS panel (assuming you have such a thing) seem to be working correctly (obviously the bar and seat light won't be on if you're not seated with the lap bar down). The other simple thing to check is just to raise the cab and poke around gently at the wiring harness under the cab. My 751 connectors are very well made and seem really keep out the dirt and moisture, so that is not an obvious thing to check. --- Seems to me from what you described that this most likely is a wiring or control problem, and most likely has nothing to do with the hydraulic system itself (pump, motors, etc). Just my two cents worth. --- Bob [/QUOTE]
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Aux hydraulics not locking in
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