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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: D6 Hydraulics Problem

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06-10-2012 20:50:26

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Can't say for sure what type pump they used on the hydraulics on that machine, but I know the vane pumps CAT often used on their equipment would lose their prime if left setting for a period of time. Too, I have had the vanes stick and not want to pump properly right off.

The first thing I'd do is look on the inlet or the outlet side of the pump and see if there is a small fitting/plug that you can remove. With the plug out pour in a quart or two of hydraulic oil, and replug the hole. I've had to repeat this proceedure several times on occasion to ever get the pump to actually pick up, but give a couple of shots of oil, it never failed to work.

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06-11-2012 16:14:28

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 Re: D6 Hydraulics Problem in reply to NCWayne, 06-10-2012 20:50:26  
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Thanks for the tip; I'll get out there Wednesday, and see what I can find. Do you know where someone can access a schematic of the pump & tank? I've a parts manual, but strangely, it doesn't even include the Hydraulic system (that I can find). Thanks again.

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06-11-2012 18:27:58

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 Re: D6 Hydraulics Problem in reply to belsheen, 06-11-2012 16:14:28  
The hydraulic control systems on those machines were seperate from the machine itself when it came to parts. No guarantees but I do have a few of the parts books for the hydraulic systems so I'll look when I get back to the shop and see what I've got.

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