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Case Tractors Discussion Forum
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930 Case, 3point won't lift

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Dad's Old Case

04-21-2004 19:19:52




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Have a 930 CK, '68, good old tractor in all aspects except the 3 point hitch. Have to run the tractor to full RPM just to get the hitch off the ground. Won't lift a small round bale. Have had 3 "mechanics" look at it in last 10 years, manual is no help. Any ideas? Thanks for your time




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Jens Andersen, Denmark

04-23-2004 10:22:58




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
I have a 1030, no 3point, and I could not get the
remotes to work, because the suctionscreen was
plugged. I drained the transmission, and poured gas in backwards where the pump is mounted at the
back to clean it out, new oil in it and now it
works fine.
Best wishes, Denmark



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rc

04-22-2004 19:57:20




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
I had a Case 830 that would not generate enough pressure to raise a load on the 3pt, and the remote outlet did not work either. There was a small piece of debris that plugged the pilot relief valve located on the top of the auxillary valve casting on the rear of the tractor. It only takes a wrench to remove the housing, but be careful-there is a spring, poppet, and some shims that will come out. Even a small amount of foreign material may prevent this from closing and not allow pressure to build-it is a very small diameter hole. This info is for early series tractors-later comfort king tractors had a similar arangement, but I believe it was mounted horizontal, rather than vertical, in the housing. The shims are used to set the hydraulic pressure.

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turbo

04-22-2004 19:35:53




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
The filter on 730, 830, and 930 was a small spin-on filter that filtered a small amount of return oil in the system. Would not affect the performance of the system. If the remotes perform normally, most likely the problem is in the 3 point control valve known as the DOM, (draft-o-matic) valve. The first place to check with your problem would be the operation of the lowering spool in that valve. It is the front spool with the small stiff spring under the flat cover with 4 retaining bolts on the right hand side of the valve. Watch out for all of the springs and balls under this cover.It is controlled by a ball that contacts the ramp on the long operating spool. Many times contamination sticks the ball in the bore holding the lowering spool off of its seat and returning all or most of the oil to sump instead of lifting the 3 Pt. Also, for some strange reason, the adjusting screw rotates getting longer even with a tight locknut. On 1175 on down, the adjustment is 0.30 spool travel before the ball lifts the lowering spool. With the spool off of its seat, this is why you have to have the engine at full RPM to overcome the leak to lift the 3 point and as you slow down the engine, the arms go back down. I hope this helps.

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Change Hyd Filter 1st

04-22-2004 17:13:55




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
Keep it simple and go for the easy cheap things first.



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Steve G

04-22-2004 15:59:18




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
I used to work on these tractors and most of the time if there was a problem with the three point and the rest of the hydraulic remotes worked okay there is nothing wrong with your pump. Both items run off the same system. You might have aproblem with your sensing if your remotes work good. Case had a sensing for the tree point that mounted on a shaft under the tractor about in the area where the lower arms mount. If this has become unhooked or if bent it will affect the lift rate of the arms. If this is all functioning properly look intoyour valving real close. But I think that you will find that the sensing shaft is your problem. It was the most common at the dealership where I used to work. Hope this helps

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DKase

04-22-2004 06:08:56




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
We had a simular problem with ours several years ago. We were lifting a 6 row wide ridge till cultivator that was 50% heavier than the tractor was designed for. It turned out that the pressure cracked the casting out the front side of the remote valve and the oil was pumped into the rear end instead of the 3 point cyl. If we would speed up the engine some of the oil would end up in the cyl. and it would lift and hold up fine. The warmer the oil got the worse the problem was. If it is cracked there it will show low pressure on the remotes also and your pump is actually fine. LOL DK

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John Saeli

04-22-2004 04:47:34




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
Hey Dad: Bob has some good pointers there. Do you have good Pressure @ the remotes? If you do, you could also have a problem with the lift cylender. If you don't have good pressure @ the remotes, the pump could be shot. On my 1175, I had poor hydraulic response, and the problem was a 5 Cent "O" Ring between the Pump & Suction Block. I can't remember how the Comfort Kings are set up in there.



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Bob/wis

04-21-2004 20:38:58




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 Re: 930 Case, 3point won't lift in reply to Dad's Old Case, 04-21-2004 19:19:52  
Have you had the hyd pressure tested? If its up there around or above 2000 your good there. If not start by checking filters then maybe have to replace the pump. Or There is a setting right by the base of the set to adjust the draft sensing. I still have yet figured that on out yet. But it couls just be foriegn junk in the valve body called S**T. Where are you located?
Bob/wis



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Ol Chief

04-22-2004 20:10:14




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 Re: Re: 930 Case, 3point won't lift in reply to Bob/wis, 04-21-2004 20:38:58  
I had a similar problem with an almost new 930CK that I owned in 1960s.Such along time ago I do not remember the details,but I seem to recall that there is a control adjustment under a plate beneath the seat.I now have an 1175 and also had the same problem several years back.I think their set up is similar.I do remember that Case had a dealer service bulletin and did a call back of tractors right after the new model came out. Dealers did a small modification.In any event their design of draft control was fairly simple.I had a Case dealership then for a few years in the 1960s but unfortunately did not retain any of the volumes of data.As stated in an earlier post,it is possible that you have a damaged control rod that goes from the sensing pull point under the gear case, vertically thru the trans.to the sensing system under the drivers seat.If all else fails look in the area described.Good luck!

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