SD3943T hyd slow when warm: Shibaura  -- Other Tractor Brands Discussion Forum and Review SD3943T hyd slow when warm: Shibaura -- Other Tractor Brands Discussion Forum

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 07-10-2005, 10:29 Post: 113224
ytrewq



Join Date: Jun 2005
Location: south dakota
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 SD3943T hyd slow when warm

I have a SD3943T hydraulics work great when cold but are very slow when machine warms up any thoughts has a loader which also slows using 20 wt trans-hyd is this to light?






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 07-25-2005, 06:05 Post: 113870
earthwrks

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 SD3943T hyd slow when warm

My backhoe does this when it has been run hard, the weather is very hot and sunny. I have to run a garden hose over the cooler and the hydraulic pump. Aluminum-bodied hydraulic pumps tend to expand quicker which drops the compression beteen the side ealing plates around the pump gears. Also low hydraulic fuild levels will sometimes lead to not enough cooling capacity. If your machine uses the trans and/or axle case for a reservoir, there may be excessive wear like a bearing that is putting out too much heat and the opil is soaking it up too. Are your brakes oil-cooled by the same fluid and they are dragging making heat?






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