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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
642 Hydraulic Pump replacement (Vickers part number)
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<blockquote data-quote="Tazza" data-source="post: 3743" data-attributes="member: 82"><p>First off, the pump has no internal relief valve. Its all regulated at the control block so the pump pressure has nothing to do with it, as long as it will handle say 2,500 PSI you will be fine.</p><p>You will need to match the flow, and mounting specs off your old pump. Direction is easily changed by fliping the cam plate i think they call it.</p><p>Are you sure its the pump? as these are a vane pump they don't really wear out. As they slowly wear, the vanes bed themselvs into the grooves. When they wear out, vanes fall out and get munched and stop working all together. They don't really loose presure over time and when they fail, they really fail.</p><p>Does your 642 have a square block that sits on top of the hydrualic pump? there is a filter hidden inside there that causes problems when the machine warms up.</p><p>You can also get kits to repair these pumps, they have a new rotor, vanes and the housing they run in. If you can give vickers the part number they can suply you with a repair kit.</p></blockquote><p></p>
[QUOTE="Tazza, post: 3743, member: 82"] First off, the pump has no internal relief valve. Its all regulated at the control block so the pump pressure has nothing to do with it, as long as it will handle say 2,500 PSI you will be fine. You will need to match the flow, and mounting specs off your old pump. Direction is easily changed by fliping the cam plate i think they call it. Are you sure its the pump? as these are a vane pump they don't really wear out. As they slowly wear, the vanes bed themselvs into the grooves. When they wear out, vanes fall out and get munched and stop working all together. They don't really loose presure over time and when they fail, they really fail. Does your 642 have a square block that sits on top of the hydrualic pump? there is a filter hidden inside there that causes problems when the machine warms up. You can also get kits to repair these pumps, they have a new rotor, vanes and the housing they run in. If you can give vickers the part number they can suply you with a repair kit. [/QUOTE]
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642 Hydraulic Pump replacement (Vickers part number)
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