Re: 640 hydraulics

Posted by john in la on June 11, 2005 at 20:14:56 from (65.6.119.60):

In Reply to: 640 hydraulics posted by straberiwine on June 11, 2005 at 18:29:32:

That depends on what you mean by "is this something for me to worry about"
If you mean should I get rid of this tractor and get something that parts are available for or loose sleep over; I would say NO.
If you mean should I take care to do every thing I can to prevent having these lines go bad in the first place; I would say YES.

These hyd lines are in the bottom of the trans compartment and it is true they are no longer available. I think they are even getting hard to find used. The length of the tube is the same ID but the OD is in 3 steps making ordinary tubing hard to use. Some have had them turned on a lathe and others have put Millimeter size tubing in the old tubing to make them work.

Your best bet is to do what ever you can do to keep your tubes usable. These tubes meet their demise because of rust. Since they sit in oil and have oil running through them rust should not be a problem if every thing works correctly. BUT when your shifter boot gets worn and you let it go; it lets water into the trans. If you do not replace the oil regularly these tubes are then sitting in water so they rust out creating a leak.

Change your trans and hyd oil regularly and repair any spots where water can get in. Condensation will still happen but if you use your tractor regularly it should boil off this small amount of water.

But if you use your tractor once every 4 months; park it outside in the rain; do only what you have to do to keep it running in the maintenance department; then get ready to replace these tubes.

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