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Tractor Talk Discussion Forum

640 hydraulics

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straberiwine

06-11-2005 18:29:32




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ive heard a lot about leaking hydraulic lines on these old tractors not being repairable or replaceable is this something for me to worry about on my 55 640?




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Ken Crisman

06-12-2005 01:59:50




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 Re: 640 hydraulics in reply to straberiwine, 06-11-2005 18:29:32  
Talking with Zane Sherman will give you a lot of info on the hydraulics & repairs . As John said ; good maintanance as far as the keeping water & moisture from causing you problems is a must . Money & time spent keeping " OIL " not water in the reservoirs will determine how your hydraulics perform & last . Those rubber boots save you alot just like condoms save you problems . Ken



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john in la

06-11-2005 20:22:18




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 Re: 640 hydraulics in reply to straberiwine, 06-11-2005 18:29:32  
Sorry about my trigger happy mouse and the double posting



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txgrn

06-12-2005 06:59:42




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 Re: 640 hydraulics in reply to john in la, 06-11-2005 20:22:18  
Happens to me more often than I'd like. Seems like when you release the button (not press it), it sends the message. If that bit gits lost, the post doesn't record. I have Win XP now and it has a cue at the bottom of the screen; like 5 or 6 little green bars tell you how things are going. I can tell when I submit something if it lingers on the second or 3rd bar I will have to whack it again and get double or more postings.

Mark

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john in la

06-11-2005 20:16:44




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 Re: 640 hydraulics in reply to straberiwine, 06-11-2005 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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john in la

06-11-2005 20:14:56




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 Re: 640 hydraulics in reply to straberiwine, 06-11-2005 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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john in la

06-11-2005 20:14:15




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 Re: 640 hydraulics in reply to straberiwine, 06-11-2005 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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