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  #1  
Old 11-13-2020, 01:58 PM
jwhill jwhill is offline
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Default 1650 Hydro Leak

Seem to have a slow leak from the tube that connects the top to the bottom on the front of the hydro. The nut is tight. Is this common? Does the entire tube need replaced? Thanks for tips!! Oh, one other thing. The hydro cooling fan blades are broken off. How important is this? Was thinking about using a 12vdc fan instead of the small plastic fan. Thoughts? Thanks!
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Old 11-13-2020, 02:14 PM
finsruskw finsruskw is offline
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Clean the area good w/some solvent or the like and dry.
Then douse the area with some baby powder or talc and wait
The fluid track in the powder will lead you straight to the leak.
More than likely it will be the cork gasket between the pump and the housing.
Not a fun job to replace.
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Old 11-13-2020, 02:19 PM
jwhill jwhill is offline
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Thank you!!!
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Old 11-13-2020, 05:56 PM
jwhill jwhill is offline
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Oh, one other thing. The hydro cooling fan blades are broken off. How important is this? Was thinking about using a 12vdc fan instead of the small plastic fan. Thoughts? Thanks!
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  #5  
Old 11-13-2020, 07:29 PM
finsruskw finsruskw is offline
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Replace it.
And while you are in there do a good housekeeping job while you are at it and check all the rag joints and coupler pins for looseness and distortion
A clean hydro with functioning fan is a happy hydro!!
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  #6  
Old 11-13-2020, 07:46 PM
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ol'George ol'George is offline
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Depends on what you are doing with the GT.
If it is a play tractor, the fan is not necessary.
If you are working it like cutting grass in hot weather or using a moldboard,
you should have the fan assisting cooling and don't junk it up with a electric fan cobble job.
just get the correct fan and while you have the driveshaft out, replace the badly worn couplings & associated parts on both ends of the shaft.
Then it will be good for another 40+years.

As far as the hyd leak if it is truly leaking at the tube nut, prolly have to replace the tube as the tight turn on one of those tubes prevents re flaring of the tube.
3/8" hydraulic /fuel line tubing from auto supply works well.
you can reuse the old nut and bushing.
Do check that the mounting bolts between the frame and rear axle housing are tight and intact also the front ones behind the hydro that hold the front of the rear axle housing to the frame
Also make sure your leak is really the tubing nuts and not the 2 relief/dump valves, just above the tubing connections.
The cleaning and baby power as mentioned, works well for tracking/finding any leak.
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Old 11-14-2020, 09:48 AM
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Billy-O Billy-O is offline
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A long whiles ago, I kept pissing off thinking my hydro tube was leaking when in fact the leak was the cork gasket at one time and the relief valves another. So I agree with the others.... look higher up to be sure.

Don't you have a tunnel cover on your 1650 you can remove to observe looking down?
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Old 11-14-2020, 11:27 AM
jwhill jwhill is offline
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Thank you!
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Old 11-14-2020, 11:42 AM
jwhill jwhill is offline
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I cleaned everything well, and have been watching it for a couple of weeks. The relief valves are dry. The drip does it appear only from the bottom fitting on that tube. All other surfaces are dry. Thanks again for all of the help!
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