630 John Deere--Got her bought

Old Bob

Member
Got my 630 bought. Seems to be ok. Needs some spucing up. The first thing I have to deal with is the power steering. Previous owner said it would turn with one finger when over haul of engine began. Now it doesn't work. It is low of fluid. Called the 2 closest JD dealers and between the 2 of them they did not have enough fluid to service the power steering unit. Is there another fluid that would be ok to service the power steering with. Thanks in advance!!
 
Several times in a pinch I have used medium hydraulic fluid and it didn't bother anything . Still in one of the 630's .
 
You'd be best to order the right fluid... and expect you'll need more until you find where the leak is. If it is low, there's a leak somewhere...
 
Those tractors over time have issues with the rectangle wiper seals as well as the retaining pins breaking. There is also a large seal at the lower pedestal which is possible leaking...general this occurs due to wear however I've never know the large bearing to generally go bad. I've taken several of them apart and it not a job for beginners....maybe some non foaming light oil will work for you...oil reminds me of 10W....locally we don't have many parts available for the steering units and you'll find if you need very much it is really expensive. Good luck...
 
Dan: pictures are worth 1000's of words....I've been there and done that....main thing is not to loose a finger....first time I worked on one I was really over my pay grade and probably others...I'm sure this was seldom even done at dealerships...really two man job...I found the big bearing always in tack as it doesn't get much movement...I found to turn the gear at top of housing 180 degrees before reinstalling as this was unused surface...now having done all the hearvy work one has to get to the control valve and pump which I've also done...personally I never felt JD did a good job on power steering design from the start....who could afford to work on much of this and now the parts and learning curve is way out there...but good luck to the new adventurers...good presentation....
 

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