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Case Tractors Discussion Forum

David brown 880 external hydraulics

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pat

07-29-2004 10:03:21

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We have a david brown 880 implematic 4 cylinder. I want to use a single double acting spool valve to operate an hydraulic top link. I was going to use the regular external trailer tipping outlet for the source (connected to the left hand side as you are sitting on the tractor). The problem is where will I connect the return oil?. There doesn't appear to be a tapping on the gearbox housing any where. Any help would be appreciated.
Pat

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rhudson

07-29-2004 21:50:08

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Re: David brown 880 external hydraulics in reply to pat, 07-29-2004 10:03:21

how are you going to tap into the valving on the left? do you have a db valve set for externial or are you going to modify the cover at the left?

i think you should probably return by way of the plug that is centered in the top of the rear cover. the return oil is used to lubricate the pto gearing, so it must be return so as to flood over this area.

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Pat

07-30-2004 01:35:19

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Re: David brown 880 external hydraulics in reply to rhudson, 07-29-2004 21:50:08

I don't have a valve set at the moment but I was intending on getting a valve set for the external in a breakers yard or similar and using it.

I know the plug on the PTO housing that you mention. I initially discounted this thinking the oil must go straight into the gearbox but it makes sense now. Thank you for your help.
Pat

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