Belly Pump Reseal and Trans Input

Ken Christopherson

Well-known Member
Hello all! Well, I am well into the belly pump reseal project that I said I was going to start. Been taking photos and videos along the way for others who decide they want to take this challenge on. So far it has been pretty easy going. Managed to get the pump out without smashing my fingers or worse.. Cleaned up everything inside and out, pump itself looks good (functioned fine before, just leaked). Replaced the seal on the pump drive. Now, the seal listed on the Case-IH site for the hydraulic control arm is part number 19812D which crosses to a SKF 7512. I ordered this seal and it is not even CLOSE (See photo). Guess I will have to try to reuse the original that was in it. Was still soft and pliable, so I doctored the mating surface up in the casting with a little RTV to try to give it some help. Got my gasket made, and reassembled the pump.
Removed the pump driveshaft seal retainer/carrier and drove out the double lip seal. Still waiting on the two replacements to come in the mail, so am at a standstill. I am about to begin taking the clutch and driveshaft out to replace the input shaft seal as well since I am in there (should have done it when I had the tractor split 3 years ago)... Live and learn. Any pointers for those who have done it in the past through the belly? I don't have the proper equipment here to split the tractor safely, otherwise I would do that. Done a little research in the archives, but figured maybe someone had done it recently that could give me some insight.
Been taking video of the whole process so I intend on posting that up when all finished. I sure appreciate everyone's help through this ordeal. Hope to be the last time I am in the clutch housing for a LONG time.
Also included a photo of the tool we made at my friends place to get the drive cog loose on the pump drive shaft.. A little welding and we are in business.
a278981.jpg

a278982.jpg

a278983.jpg

a278984.jpg

a278985.jpg

a278986.jpg

a278987.jpg

a278988.jpg

a278989.jpg

a278990.jpg

a278991.jpg
 
Ken the new IHC number is 938294R91 , what that number transfer's to SKF, i cant tell you,but if that leaked before, it's really going to leak now, Good luck !
 
It lists that number with an updated shaft, I believe the shaft for the pump upgrade. The new seal number does not cross to anything in SKF... I tried (a couple times) just to make sure with no results. The seal was actually in really good shape and very flexible. There were a couple knicks in the outside portion that fits into the bore of the reservoir, so I'm hoping with a little doctoring and RTV it will seal up.
 
I'd approach it: Remove the clutch output shaft and throw-out bearing assembly. This will allow access to "pull" the coupler. This coupler is a somewhat tight fit (almost press fit) on the transmission shaft. If you take the center bolt out of the coupler, remove the large washer, reinstall the bolt (verify the bolt head will clear inner diameter of the coupling). This should allow you fabricate a simple flat stock/square tube metal puller, bolted to the coupler's 2 outer holes, and a center threaded rod/bolt to push against the reinstalled bolt head. It shouldn't take to much to pull the coupling off in that tight awkward space. (Note there is a woodruff key in the transmission shaft/coupler, (all that horsepower is driven through that little woodruff key)). Than 3 bolts take out the seal housing.
Assembly: Make sure woodruff key is aligned with coupler. Use a treaded rod (same thread as the coupler bolt) fully seated in the transmission shaft to essentially push coupler back on to the transmission shaft. I advise against pushing the coupling using a bolt. This risks damaging the threads in transmission shaft, unless all the threads are used.

Hopefully I explained myself well enough to give you some ideas.
 
a good seal man can check shaft size and check the hole size and come up with a seal. you may even try napa. good luck. oh we realy like your you tube chanel. Bob
 
Thanks, bud! I really appreciate everyone's input on the ordeal! I figured that I would make a video out of the whole process because there really isn't much out there. I am not sure of the ins and outs entirely of the pump, but I was always taught if it ain't broke, don't fix it! (Because with my luck when I fix it I will have to open it back up to fix it again)!
Belly Pump Video
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top