What Hydraulic to use AW32 or AW46

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    • July 19, 2013 at 5:35 pm #36206
      Bob Rooks
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        lenbo wrote:

        “Also been told that using heavier oil will produce a hotter oil temp (wear seals out faster).”

        Not sure where you heard that lenbo, but it is pure bunk. A good operating temperature for most hydraulic oils is around 150° F sustained with around 200° F being maximum. The scraper rings on hydraulic cylinders are usually good for 300° to 400° F, and most Nitrile, Neoprene, or Buna-N components are in the same neighborhood with Silicone being higher. I use a multi-viscosity (multi-vis) hydraulic oil in all of my equipment. It's rated AW ISO 32/46/68, and is available through most manufacturers. If you prefer to run a straight grade, I would recommend the AW 32. If in doubt, check the operating temperature with a gauge or hand held gun. None of these machines have hydraulic oil coolers on them, they rely on heat dissipation from the volume of the reservoir.

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      • July 20, 2013 at 7:39 am #36207
        lenbo
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          Bob:

          Thanks for the information. I have looked around for the multi-viscosity ISO AW 32/46/68 and none of the shops around hear have it. What brand do you use? I'll look to get it off the net.

           

          Thanks much

          Len

        • July 20, 2013 at 9:02 am #36209
          Bob Rooks
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            I use O'Reilly Auto Parts house brand. I believe it's repackaged by Citgo. It meets all specs. Here is a short read on multi-vis hydraulic oils. It's a few buck more than a straight grade oil but I believe the benefits are worth it.

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          • July 20, 2013 at 9:41 am #36210
            Tinbender
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              Interesting. I'll be changing mine out this winter and the local O'Reilly's has it in stock, and I have an account there.hmmm

            • July 20, 2013 at 3:02 pm #36211
              lenbo
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                Bob

                Thanks much!

                There is a O'Reilly Auto Parts  about 15 miles away (the only auto store or tractor store I didn't check) and I just called them and they have some in stock.  Will be picking up several 5 gallon buckets tomorrow.

                Good read on the multi-vis hydraulic oils.

                 

                Thanks again

                Len

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