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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: D6 Hydraulics Problem

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Old Magnet

06-10-2012 20:58:35

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The Cat system uses the #46 hydraulic control with the vane pump built into the tank. They are sensitive to oil viscosity and can take a while to pump if the oil is to thick or contaminated. Drain some oil from under the unit and see what you have. Yes, it is possible for the vanes to stick thus no pumping.

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06-11-2012 16:35:11

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 Re: D6 Hydraulics Problem in reply to Old Magnet, 06-10-2012 20:58:35  
Thanks for the info. I did let it run for 1/2 - 1 hour, and tried to keep working the lever, thinking that if it warmed-up enough and I worked it enough...... (someone thought perhaps air could be in the cylinders/system)... but I didn't get anywhere. At least the oil at the dipstick appeared low viscosity, especially after it warmed-up (of course). I'll take your advice, and try to find a drain and see what's there.
Any idea where it's located on that specific unit.

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Old Magnet

06-11-2012 21:27:49

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 Re: D6 Hydraulics Problem in reply to belsheen, 06-11-2012 16:35:11  
There are two magnetic drain plugs, bottom front of grill, one on each side of center. Be a good idea to check the filter also.

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