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  #11  
Old 02-12-2014, 03:21 PM
Rick M. Rick M. is offline
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Join Date: Feb 2014
Location: Ontario
Posts: 2
Default Hydrostatic info
I just realized how important this site is....So I joined....Have been playing with Cubs for 30 odd years and now realize how much I do not know....To the point,I have several leaky Dump Valves which I intend to redo as I have the equipment....I always considered that the main purpose of these valves was to bypass the motor and allow the wheels to turn when pushed or on an extreme incline but I was mistaken.....They are in there to maintain the high pressure circuits at a maximum of 3500 PSI and prevent physical damage to the aluminum case....It all makes sense to me now that I know their their real purpose....Used to roll the tractor without engine power is a bonus feature of the overall design and not the intended use...Something else I found is that sealing the vent hole in the valve top(weld up) will not work....Yesterday I tried it on my 782 since I do not care if it will roll or not....Mig'd both them closed and installed them.....No power to the diff in either direction......Ground off the welds and away she went....Thanks for your patience
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  #12  
Old 02-12-2014, 07:32 PM
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Cub Cadet 123 Cub Cadet 123 is offline
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Join Date: Jun 2009
Location: Ohio
Posts: 4,499
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Quote:
Originally Posted by Rick M. View Post
I just realized how important this site is....So I joined....Have been playing with Cubs for 30 odd years and now realize how much I do not know....To the point,I have several leaky Dump Valves which I intend to redo as I have the equipment....I always considered that the main purpose of these valves was to bypass the motor and allow the wheels to turn when pushed or on an extreme incline but I was mistaken.....They are in there to maintain the high pressure circuits at a maximum of 3500 PSI and prevent physical damage to the aluminum case....It all makes sense to me now that I know their their real purpose....Used to roll the tractor without engine power is a bonus feature of the overall design and not the intended use...Something else I found is that sealing the vent hole in the valve top(weld up) will not work....Yesterday I tried it on my 782 since I do not care if it will roll or not....Mig'd both them closed and installed them.....No power to the diff in either direction......Ground off the welds and away she went....Thanks for your patience
Glad you find this site helpful. Let me be the first to say to our new friend up in the great white north...

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  #13  
Old 02-12-2014, 11:31 PM
Yosemite Sam Yosemite Sam is offline
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Join Date: Mar 2009
Location: Medora, IL
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Yeah, welcome...

You are correct, I think a couple of the guys here know what their talkin about.
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  #14  
Old 02-13-2014, 05:55 AM
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Cubcrazy Cubcrazy is offline
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Welcome to OCC!
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  #15  
Old 02-13-2014, 02:38 PM
Rick M. Rick M. is offline
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Join Date: Feb 2014
Location: Ontario
Posts: 2
Smile Leaking Dump Valves
Thanks for the words of welcome......Went out yesterday and took the valves out of my 782 which would loose up to 2 quarts in 2 1/2 hour of blowing snow...There was an actual flow out the tops of both valves.....Machined off the valve top ,cleaned,installed new internal "o" ring and Mig'd the top back on...Ran few minutes up and down driveway-1000 feet..A small drop on top of one valve.....Nice fix...........................
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  #16  
Old 02-13-2014, 07:38 PM
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ACecil ACecil is offline
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Originally Posted by Rick M. View Post
I just realized how important this site is....So I joined....Have been playing with Cubs for 30 odd years and now realize how much I do not know....To the point,I have several leaky Dump Valves which I intend to redo as I have the equipment....I always considered that the main purpose of these valves was to bypass the motor and allow the wheels to turn when pushed or on an extreme incline but I was mistaken.....They are in there to maintain the high pressure circuits at a maximum of 3500 PSI and prevent physical damage to the aluminum case....It all makes sense to me now that I know their their real purpose....Used to roll the tractor without engine power is a bonus feature of the overall design and not the intended use...Something else I found is that sealing the vent hole in the valve top(weld up) will not work....Yesterday I tried it on my 782 since I do not care if it will roll or not....Mig'd both them closed and installed them.....No power to the diff in either direction......Ground off the welds and away she went....Thanks for your patience
Welcome to OCC! Glad to have you!
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