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Here is the promised quote as related to your RPS issue. It's from the Case 2470 "Agricultural Service Education Department Manual". It's more informative than the Service Manual. >>>> "Engine Will Start, Then Stall With the Clutch Pedal Down.
C-1 Clutch problem.
C-1 clutch pilot valve is stuck open. Start the engine and at the same time observe an installed C-1 pressure gage. There should be no pressure. If pressure appears, C-1 pilot spool is stuck open and the engine will stall. If no pressure appears and the engine still stalls, the C-1 piston is stuck and will not release, or the C-1 clutch plate is split and jammed.
Note: With above problem, the engine will run OK with the clutch pedal up in low or second, but will stall again when shifted into high." My comments >>>
I believe the described procedure assumes the engine will be started with the clutch pedal depressed? As would be the normal/safe starting method. You said you found and cleaned a stuck valve under the C-1 ID on the tranny top plate. I can verify that is indeed the C-1 pilot valve. Did you check the C-1 valve return spring free-length and poundage? I found that all 4 of the pilot valve springs were collapsed and too weak when I rebuilt my 2470 RPS control valve body. For the 2470 the springs specs are: Free length, 1.74"
Wire Dia., .046"
Outside Dia., .50"
Compressed height, 1.03"
Pressure when compressed, 5.4 to 6.4 lbs. If you have no means to check the springs... I have the necessary apparatus, I'll do it for you if you want. When the clutch is depressed the C-4 clutch always engages. This is the clutch that locks the planetary hub which creates Reverse. That's the whining sound (gear noise) when the clutch is depressed. If the C-1 clutch is engaged, for whatever reason, while the C-4 is engaged... this will lock the input shaft, which stalls the engine. Assuming the 2290 is like the 2470, perhaps this info may help you.
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