Posted by Tom Barto on November 16, 2012 at 04:23:13 from (67.142.163.26):
Working on MCV valve and pump replacement - second time doing the job - two weeks ago I lost (after the tractor sitting overnight)my steering, clutch, TA, and Brakes...
So I replaced the pump...just the pump - reassembled and nothing.
My flow control valve is fine - I did not read pressure - but my pressure switch, which shows 6V w tractor off, goes to zero volts at the lowest of RPMs (and I have some steering clutch and brake function) to 6V at any higher RMP when nothing works.
When I drained the fluid - it was draining full of air bubbles...so clearly I don't have pressure cause I'm sucking air from somewhere...
So Im doing a complete overhaul of the MCV...I've got it all apart, but not really seeing anything out of wack.... - some of the internal orings are pretty flat and seem to have microscopic cracking...but IDK how much that will affect total pressure loss.
Couple questions...I cannot find any plastic check valve and spring - there is a hole on the lower right that has no thru hole so I can't see how any fluid gets there to operate a check valve nor can I find it or part numbers on the case IH site.
Also - I can see three tubes that come into the the top of the mcv off the clutch housing and I cannot remove them...should I?
Lastly - the dump valve is operated by a lever at the clutch - It looks, by a picture in my manual that there is a spring that this bolt goes thru to work against the "pulling out action" of the dump valve - well that spring is NOT there and it also doesn't show up on the case IH site parts diag's...nor do allot of other springs I have that I know where they go...
So IDK - but its friday and I'd like to get parts...or order parts, if I'm needing them...
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