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Calling All Hydraulic Gurus: 6621 & 8363 Lift Control Valves

By ztnoo, in Transmissions and transaxles

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ztnoo    2,298

ztnoo
Posted

Question for all the hydraulic gurus here on RS.

Are there any functional differences between the 6621 and the 8363 hydraulic lift valves.

I am aware of the slight physical differences between the two valves, but are there any differences regarding flow rates, differences in which hose opening/port does what, or fitting sizes???

Are these two valves interchangeable in a real world, practical, functional sense???

 

 

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ztnoo    2,298

ztnoo
Posted

Finally arrived at some answers revolving around the 8363 control valve.

 

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    • ztnoo
      8363 Hydraulic Control Valve Picture?
      By ztnoo
      Would anyone happen to have the 8363 hydraulic control valve with operates the cylinder which lifts the mower deck off your tractor???
      I need a pic of the bottom side of that valve. The valve part number is 8363.
      I need to replace the spool valve seals inside the valve body on my tractor (they are leaking profusely) and I'm trying to figure out a way to do that without tearing the tractor half way apart.
      The seal kit instructions from Lowell (wheelhorseman1000 at Red Square) says the spool valve is secured with a snap ring on the bottom of the valve body.
      I need to understand what the bottom of the valve looks like and then find a way to get the valve body out, get the new seals installed on the spool valve, and get it reinstalled as easily as possible with a minimum amount of wrenching.
       
      If you don't have a pic of that, could you snap and post or send me a few views of it???
      A pic of the bottom of that valve might help steer me in what I may try or not try do.
      Any help would be much appreciated.

      Here's my post on this at RS:
      Thanks,
      Steve
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