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General Bobcat Skidsteer Forum
Bobcat 630 Reclamation
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<blockquote data-quote="peebeeaitch" data-source="post: 62658" data-attributes="member: 8318"><p>The Geroler groove is deeper than "fingernail". It's really difficult to judge, but it's enough that I stripped the other motor to see if it had the same groove, which it does not.</p><p>My manual says that the rear pump drives the left side and the front pump the right. The picture of the wafer plate is from the rear pump. I need to purchase a circlip plier to explode the front pump, so cannot comment on it yet. It would appear that currently I have identified a leaky rear pump driving good right motor, and a possibly good front pump driving a leaky left motor. The leaky rear pump (right motor) seems to be less leaky than the left motor, hence the PO saying that the right side was good.</p><p>I am truly worried about the wafer plate. The grroves there are probably double the depth of the motor ones. It's also uneven, meaning there are numerous concentric score lines, at arbitrary diameters and then a really deep "pocket" just outside the port slots. The colour of the brass is shiny in the pocket, not like the other scores, meaning, I think, that it is fresh.</p><p>I will take a photo tonight of the rear of the pump housing. There is a circlip holding I don't know what. The aluminium that forms the body of the housing between the circlip and the U-joint has been eaten away. I wonder if something is pressing the whole hydraulic pump forward and perhaps causing the parts to score the wafer plate?</p></blockquote><p></p>
[QUOTE="peebeeaitch, post: 62658, member: 8318"] The Geroler groove is deeper than “fingernail”. It's really difficult to judge, but it's enough that I stripped the other motor to see if it had the same groove, which it does not. My manual says that the rear pump drives the left side and the front pump the right. The picture of the wafer plate is from the rear pump. I need to purchase a circlip plier to explode the front pump, so cannot comment on it yet. It would appear that currently I have identified a leaky rear pump driving good right motor, and a possibly good front pump driving a leaky left motor. The leaky rear pump (right motor) seems to be less leaky than the left motor, hence the PO saying that the right side was good. I am truly worried about the wafer plate. The grroves there are probably double the depth of the motor ones. It's also uneven, meaning there are numerous concentric score lines, at arbitrary diameters and then a really deep “pocket” just outside the port slots. The colour of the brass is shiny in the pocket, not like the other scores, meaning, I think, that it is fresh. I will take a photo tonight of the rear of the pump housing. There is a circlip holding I don't know what. The aluminium that forms the body of the housing between the circlip and the U-joint has been eaten away. I wonder if something is pressing the whole hydraulic pump forward and perhaps causing the parts to score the wafer plate? [/QUOTE]
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Bobcat 630 Reclamation
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