cact34r - 5/25/2017 22:34 Update for tonight - thank you for all the information provided so far. I'll try to answer the questions above. Jim Naden - I'm a little confused by what you wrote. If the steering pump on my tractor was weak and it supplies oil to the MCV would I also notice steering and/or brake weakness? I understand there isn't a pump mounted to the MCV and see the steering pump under the tractor. Thank you for the diagram and the other page - I've ordered a service manual but it's not here yet. Since my steering, brakes, and seat are working normally that would lead me to think the pump is ok? I've attached pictures of the pressure at idle and 1800rpm and also a picture of the spool valve. The spool you had out is the pressure regulator, located at the top of the MCV. You need to remove the flow divider, item 8 in the attached illustration. Behind the 1" hex plug. If it is stuck it can cause the exact symptom you describe. The one advantage of a 2+2 with the large external steering pump is there was rarely TA problems caused by low pump flow. IIRC the lube warning switch closes when the pressure drops to 8 psi.
Edited by Jim Naden 5/26/2017 04:59
 (MCV TA Spool Identification .jpg)
Attachments
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 MCV TA Spool Identification .jpg (31KB - 190 downloads)
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IH 3588 hydraulic warning light, TA issues help (details)
