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05chummins 
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Joined: 14 Jun 2014
Location: Central PA
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 Topic: d17 Hydraulics
Posted: 16 Jun 2014 at 8:54pm |
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I have a series 1 D17. It has a hydraulic control valve with a single outlet bolted on the left side of the tractor. It seems to be stuck and I'm not sure if it just slides in and out or what. I was wondering if this could make my hydraulic lift on my 3 pt not stay up? I have checked the oils and they are good so it must not be the cylinder or the internal hose. I had one recommendation on here about a valve on the pump being bad but i wanted to ask about the aux hydraulic valve before I go tearing into the pump.
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CTuckerNWIL
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Joined: 11 Sep 2009
Location: NW Illinois
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Posted: 16 Jun 2014 at 9:01pm |
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Show us a picture and save a thousand words. If the "add on" valve has a return line to the sump, it could possibly leak past the valve and back to the sump letting pressure off of your lift arm cylinder. There is no way for us to know without seeing it or a drawing of it.
I doubt that add on is your problem though.
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05chummins
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Posted: 16 Jun 2014 at 9:03pm |
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I will get a pic tomorrow night after work and post it.
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05chummins
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Posted: 18 Jun 2014 at 5:35am |
uploads/11870/0617142108.jpg uploads/11870/0617142108a.jpg uploads/11870/0617142109.jpg
Not very good pics but this is what I have. Looks to me like the round black knob should slide in and out but I'm not sure and seems pretty stiff.
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Joe(TX)
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Location: Weatherford. TX
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Posted: 18 Jun 2014 at 7:19am |
It looks like the transport valve was replaced with a selector valve. The knob should slide in and out. It looks like it is only a shuoff for the remote. Normaly a selector valve is used along with the transport valve.
The problem would seem to be in the pump. Nay be a check valve not seating or a control linkage problem.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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CTuckerNWIL
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Posted: 18 Jun 2014 at 7:49am |
Like Joe says, that looks like a selector valve to put fluid to the remote or the lift arms. I don't believe there is any way that can be letting your lift arms sink. since the system is one way and there is no return line there. 
Edited by CTuckerNWIL - 18 Jun 2014 at 7:52am
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05chummins
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Posted: 18 Jun 2014 at 11:31am |
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Not what I was hoping for but will be a good winter project. I'll have to hit the manuals. The only way to get to the pump is split the tractor right?
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DrAllis
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Posted: 18 Jun 2014 at 5:05pm |
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Nope. It drops out the bottom of the torque housing directly under the fuel tank.
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05chummins
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Posted: 21 Jun 2014 at 1:20pm |
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So today I went out and put a water pump on the D17, I decided to mess with the auxiliary Hydraulic valve. If I Have the valve pushed in towards the front of the tractor it will raise the brush hog but then almost immediately creeps down pretty fast. If I have the valve pulled out toward the back it will not raise the brush hog but if i raise it in forward position and then hurry and switch valve to back position it held the brush hog for a couple hours. Does this make sense to anyone
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DrAllis
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Posted: 21 Jun 2014 at 1:45pm |
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It means the tractors hydraulic pump hold valve has a problem. All you're doing is blocking the flow so it can't settle down when you lock-out the add-on selector valve.
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05chummins
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Posted: 22 Jun 2014 at 6:45am |
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I called my local AC dealer yesterday and he was unsure of the valve and had to call me back Monday. Anybody know where I can buy it online?
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CTuckerNWIL
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Posted: 22 Jun 2014 at 8:47am |
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The control "valve" as far as I know is a series of check balls and springs. If you read the repair manual, it may be evident that a simple cleaning and maybe a couple replacement parts will put tours back in order.
The manual also takes you through a diagnosis with a pressure gauge installed in your remote connection, to figure out what might need attention.
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1950A.C.WD
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Posted: 03 Dec 2014 at 1:33pm |
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MACK
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Posted: 10 Jan 2016 at 9:53pm |
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There is a oring in hold posion valve that could leak. Replace both orings when you work on hold posion valve. MACK
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