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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
440 Auxiliary Hydraulics Reversing
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<blockquote data-quote="tyman00" data-source="post: 114609" data-attributes="member: 18181"><p>I have a early 80's 440 (pre 440b days) with auxiliary hydraulics. Currently the hydraulics are only used for a snowplow with a double acting cylinder for angling the plow. It works great.</p><p>I picked up a used rotary broom that was once PTO driven and now has a hydraulic motor that is rated for 9gpm. The 440 is a bit underpowered, but I'll take it easy on it. I built a temporary mount and hooked up the hydraulics and it works pretty good. Researching the motor shows it will reverse but it does not when I attempt to reverse the hydraulics. I will admit I do not have a strong understanding of hydraulic systems so I know I am missing something either about the Bobcat system or on the attachment. I did reverse the hoses on the downstream side of the tee/checkvalve manifold (shown below) and the broom did rotate in reverse. </p><p>When I try to reverse the system it behaves as if I have maxed the full extension or retraction of the plow's hydraulic cylinder. I do notice the hoses move as well.</p><p>I don't need reverse, but curiosity is getting the best of me. If I wanted to reverse the motor do I need a dual crossover hydraulic relief valve in place of the H manifold with the one way check valve?</p><p></p><p><img src="https://i.imgur.com/Lfr3Mhb.jpeg" alt="https://i.imgur.com/Lfr3Mhb.jpeg" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="tyman00, post: 114609, member: 18181"] I have a early 80's 440 (pre 440b days) with auxiliary hydraulics. Currently the hydraulics are only used for a snowplow with a double acting cylinder for angling the plow. It works great. I picked up a used rotary broom that was once PTO driven and now has a hydraulic motor that is rated for 9gpm. The 440 is a bit underpowered, but I'll take it easy on it. I built a temporary mount and hooked up the hydraulics and it works pretty good. Researching the motor shows it will reverse but it does not when I attempt to reverse the hydraulics. I will admit I do not have a strong understanding of hydraulic systems so I know I am missing something either about the Bobcat system or on the attachment. I did reverse the hoses on the downstream side of the tee/checkvalve manifold (shown below) and the broom did rotate in reverse. When I try to reverse the system it behaves as if I have maxed the full extension or retraction of the plow's hydraulic cylinder. I do notice the hoses move as well. I don't need reverse, but curiosity is getting the best of me. If I wanted to reverse the motor do I need a dual crossover hydraulic relief valve in place of the H manifold with the one way check valve? [IMG alt="https://i.imgur.com/Lfr3Mhb.jpeg"]https://i.imgur.com/Lfr3Mhb.jpeg[/IMG] [/QUOTE]
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General Bobcat Skidsteer Forum
440 Auxiliary Hydraulics Reversing
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