720 Pwr Steer--Time to deal with it...

Started the 720 for first time this year and power steering leak did not fix itself. I will have to do it now. Any of you know if JD or someone else has a complete kit to reseal it or is it buy each piece separately from JD? I got parts book and it shows no kits for service. Any other tips on doing this job? Fluid runs out so I guess it is the Oring that has stopped sealing. Kinda ruined the tire. I want to have my duck in a row so the unit is open for a minimum time. Thanks
 
Deere has a good service manual for the two cylinder power steering systems. Mine is out in the shop and I can't remember the number offhand, but someone will enlighten us or I'll go get the number for you. I wouldn't touch it without consulting the manual.
 
I used to buy the seal kit listed in the 30 series parts manual/diagram. Then just the oil seal for the steering shaft which a 30 series does not have as they use an o-ring.
 
I have the orig JD manual, not a repro either, so I got that covered. And the assy diagram makes it look straight forward job. Also, have the IT version. So not worried about the doing it. Thanks
 
George,

Deere did have a rebuild kit, AR30476R that I used on my 70's but is no longer available as a kit. At the time I was rebuilding my 60 and 70 pedestal the parts needed where available individually. My dealer could at one time do a dealer search and find parts in dealers inventory across the country that are listed as NLA from JDparts. Your dealership and parts counter experience may differ from mine.
 
I replaced all of the seals in my 630 power steering in about 1976, so my memory about the job is not perfect. I don't remember it as a hard job, but I can remember that the vane seals broke when I tried to put them on. I tried hot water and lube but they seemed to have no stretch at all. They were $10 apiece and money was short. I got two more and one of them broke. I took the remaining seal and the vanes up to the dealer and asked if they would show me how to install them. Sure thing - no problem, and they broke the fourth one. Dollar signs were spinning in my head. They got two more off the shelf and those two slipped on slick as a whistle. The dealer gave me a credit for all of the ones that broke.
 
Check over the bottom bearing, just did dad's old 620 and it was wore out. His tractor was originally a narrow front, when he bought it he installed a Schwartz wide front. So we opted a cheaper bearing than that from Mother Deer. The rest of the seals were available from deer.
PS : We ordered the top brass bushing, but old one was tighter than the new one so we left it alone.
 
The bottom bearing is a special thrust
bearing, it has no cage on the balls and it
has an up and down to it.
 

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