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Case Tractors Discussion Forum

930 3 pt

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09-30-2009 18:27:20

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i got a 930 case that the 3pt takes a long time to start lifting. the pump has good flow and presure the 3pt lifts a load but take about 15 seconds before it starts to lift after it starts it raises good. got any ideas thanks glen

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09-30-2009 19:08:20

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 Re: 930 3 pt in reply to cts, 09-30-2009 18:27:20  
The lift plunger in the DOM valve has a orfice that allows oil to go inside the plunger to force a piston up , in turn forcing the raise plunger down to start the lifting action. the interior of the plunger has an adjustable needle to set how fast oil can get to the piston on top, over the years sludge and dirt will accumulate at the needle and restrict the flow causing the plunger action to be delayed. Remove the cover from the DOM valve and remove the rear plunger, the dome shaped piston must be removed and a lock set screw then removed then the adjusting needle, clean thoroughly and reassemble, before removal bottom the needle adjustment so you know how far to back it out upon reassembly, there is a book spec which I believe is 3/4 turn off its seat but could be wrong on that and would not mind if another would pop in if I am, reset it after cleaning and reassemble it, also remove the front lowering plunger and clean that bore while you"re there. Reinstall and it will work. mEl

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09-30-2009 20:17:40

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 Re: 930 3 pt in reply to mEl, 09-30-2009 19:08:20  
mEL , Could You flip Me your E-mail?, we Have a 1070 Concern to pick your brain about ? Thanx, Jim

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09-30-2009 19:56:02

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 Re: 930 3 pt in reply to mEl, 09-30-2009 19:08:20  
Thank you mEL. I have struggled with 930 3 point problems for years. The dealer just said to clean the spool. I wonder if you could point out the parts you mentioned on a parts diagram or I&T manual.

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10-01-2009 04:04:26

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 Re: 930 3 pt in reply to mmidlam, 09-30-2009 19:56:02  
I wish I had the capability of doing that but don"t. The spool is located on the side of the DOM valve just on top of the tranny"s right side above the right brake. the plate is secured by (4) 5/16 bolts. there are three bores, the rearmost is the raise plunger. If you want to you can remove the complete valve from the tractor easily, the spool unscrews from a threaded piece that fastens to the rear linkage, just put a long punch through the hole in the front end of the spool , break it loose and screw it till it disconnects, the valve is held to the top cover by four bolts, if you do this, carefully clean the top without getting crud down the hydraulic ports underneath the valve as there will be quite an accumulation of dirt there.

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10-01-2009 21:00:04

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 Re: 930 3 pt in reply to mEl, 10-01-2009 04:04:26  
I will look for may parts manuals or I&T manual to try and see what you mean. I like using paper parts manuals better than this online parts list. Takes me too long to find stuff on the online manual.

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