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No Loader Pressure IH444

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Kerplooey
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PostPosted: Fri Mar 15, 2019 6:30 am    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

BarnyardEngineering wrote:
(quoted from post at 06:45:16 03/15/19)
Open center hydraulic systems only work when there's ONE path for the fluid to flow through. Give it a second path, and it won't develop any pressure. A "TEE" is a bad thing anywhere between the valves and pump in an open center hydraulic system.

Forgive me for not understanding, but what "TEE" are you talking about? As I understand it, the pipe with the Red Valve on it is typically where an Aux would be tapped in for pressure. ?? Shouldn't the Isolate Valve shut off pressure to the 3 Point and direct it to the Loader? If the system was butchered to allow for the loader installation, what is the proper way to do it? Thanks for any insight.
 
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JimB2
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PostPosted: Fri Mar 15, 2019 1:53 pm    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

Hi, before flow will come out the Aux port the 3pt lift lever has to be in the proper position.
I am attaching the page from my B414 Operator's Manual(your 444 in a grandson of the B414). Unfortunately this site does not
allow pdf documents so I had to snip it into multiple jpgs.

I agree with BarnYardE that someone made a mess.
Hopefully after you read the Remote Cylinder Operating instructions it will help sort out your problem.
Basically the 3pt lift lever will have to remain locked in the UP position to have continuous flow out of the Aux port.











 
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Kerplooey
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PostPosted: Sat Mar 16, 2019 10:44 am    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

Jimb2, THANK YOU!! The 444 manual has a page with similar images, but does not break it down like the 414 manual does. Using what you gave me, I was able to figure out the correct combo; 3 point down, Isolate closed, then position lever back, and loader came alive. I have some things to figure out yet, but I hope I that I will have use of both at one time. Still trying to figure out why the handle with the red valve is there. Thanks to everyone who helped me with this. I was about making myself crazy with it. I will see what other anomalies with this thread I can answer and post them below.
 
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JimB2
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PostPosted: Sat Mar 16, 2019 3:50 pm    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

Hi, great news, I have spent a lot of time in the seat of B414, 434 and 384 with 1501 loader and later with the newer 1550
loader. We never had a 444 but neighbor next farm to east had one with 1550 loader.
To be able to use the loader and 3pt you have to modify the loader plumbing.
It is more difficult on your 444 because it is a USA assembled unit with both the suction line and the pressure line connecting
to a block that connects to the hydraulic pump. Also the high pressure line from the hydraulic pump has a hydraulic splitter
block back by the clutch housing that splits out 3 GPM for the PS. The UK build units had two hydraulic pumps, one stacked on
the rear of the other and one ran 3pt and the other ran PS.
To make the 3pt and loader usable on your 444 would require connecting the loader hydraulic control in hose (the one that is
connected to the Aux port now) to the small high pressure line out of the splitter block and the loader hydraulic control out
hose (center right side of loader control, now going back to filler plug) to the small hi pressure line at the front of the seat
just above the transmission cover. The dump line that connects to bottom of loader control will remain going into hydraulic
filler plug. This configuration will allow 3pt and loader to operate together but if you pull loader control valve lever and 3pt
lever at the same time the loader will go first and as soon as you release loader valve 3pt will lift.

I have included a couple of photos, one of proper loader control vale connection, parts in yellow is the ones you would have to
add, the blue parts you already have connected. The item #18 and 19 you could buy from CIH but the one shown goes directly to
the pump, yours would have to connect to high pressure line out of the splitter block. I don't know if the lines are screwed
into the splitter block or welded. Here in Canada we always had the UK build models.
The other photo is of a typical PS splitter block from CIH parts.

Hope your 444 works well for you.





 
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Kerplooey
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PostPosted: Sat Mar 16, 2019 7:02 pm    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

JimB2,

Thank you for your continued support! In your explanation, you stated that I would need to connect the loader hydraulic control in hose that is connected to the Aux Port to the small high pressure line out of the splitter block. Please see the photo below. Do you mean the small line shaped like a question mark? Reason I ask is it is tapped into the Hyd Pump Suction Line, which I wouldn't think to be High Pressure. Also the loader hydraulic control out hose would have to go to the small hi pressure line at the front of the seat just above the transmission cover. Is that the one directly behind the shifter (shown in the second pic of this thread)? That pipe also goes to the PS Block, which I have labeled below. Forgive me for not understanding... it just doesn't make sense to me as to why both would connected to High Pressure.

 
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JimB2
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PostPosted: Sun Mar 17, 2019 6:25 am    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

Hi, not the ? line but remove the "Pressure to Hyd Head" line and connect the Loader valve high pressure In port Hyd line to
here.
Connect the Loader valve Out port to the Hyd In Port on the Hyd Head in front of the seat. This is where the line that you have
labelled "Pressure to Hyd Head" should go. I took your photos and put a blue line around the Hyd lines to connect the Loader
Value into.
Third photo is of a 444 with a similar Loader control valve as yours except it does not have a dump Hyd line going to the fill
plug behind the seat. The blue line is high pressure in from splitter block to In port on loader valve and black line is loader
valve Out port to high pressure In port of Hyd Head in front of seat. In this photo it would appear that the installer just took
the Hyd line off the splitter block and bent it out so that he could connect a hyd hose. Not ideal but it works. Usual method is
to shorten the steel line and put a new Hyd fitting on it or run a Hyd hose directly to the In port of Hyd Head but it is a
little difficult to get the Hyd hose to fit next the trans cover.

Theory, you 444 is an "Open Center" hydraulic system, meaning that the hyd oil is constantly flowing in a loop and when you pull
a control valve it diverts this flow to the hyd cylinder. This system is like an series electrical system. Newer modern tractors
use "Closed Center" Hyd system where there is constant pressure on all valves and the pressure is regulated by the pump. This is
like the water system in your house.
So for your 444 that is the reason you would connect the Splitter Block "Pressure to Hyd Head" port to the In port of Loader
valve and then the Loader valve Out port to the In port of "Hyd Head". The free flowing loop of Hyd oil must be maintained or
damage to the Hyd pump will occur. On the third photo I red circled the relief valve in the loader control valve, this to
protect the pump. If you were to take the loader off the tractor including the loader control valve, you would have to connect
the Hyd hoses from the loader control value In port to the Out port together to maintain the Hyd oil flow loop.

Hope this makes sense to you, if not post more questions.

JimB





 
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Kerplooey
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PostPosted: Sun Mar 17, 2019 3:53 pm    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

That makes perfect sense, and now I understand how it works! Thank you! I'll look to see what I can come up with for the pipes I need to make this thing right. You all have been so helpful. Thank you!
 
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BarnyardEngineering
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PostPosted: Tue Mar 19, 2019 3:45 am    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

The TEE I was talking about was the TEE you were going to put in to take pressure, along with the numerous other TEEs that were shown in your pictures.

If done properly, everything should just work. You should not need to do the hokey-pokey with a bunch of valves and have to choose between loader, 3pt, and/or whatever else. How that's done on a 444, I can't tell you because I'm not familiar with that tractor, but it's not impossible. There's no magic to hydraulics.

However, don't look a gift horse in the mouth. You figured out how to make it work, and that's a GREAT thing. "It works" is 99% of the way there. Having it neat and elegant, not a priority. The other thing is it will likely cost you a few hundred dollars in hoses... Replumbing is only a last resort if you couldn't figure out how to make it work.
 
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Kerplooey
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PostPosted: Tue Mar 19, 2019 7:28 am    Post subject: Re: No Loader Pressure IH444 Reply to specific post Reply with quote

I never stated anything about installing a "TEE" anywhere, thus my confusion. I was installing a terminating pressure gauge in the Aux port to check for pressure, which would not overload the pump.

I agree that there is no magic to hydraulics and I would never "look a gift horse in the mouth". I am thrilled that I don't have to replace any parts due to wear or damage. However, this is no trailer queen, either. It will be put to work, likely on a daily basis. I don't have time or the patience to be trying to do a job with something that is not correct. For the time to make 2 lines, it would be done properly and done. Who wouldn't want their machine to be working as intended? I mean, that's why we're all here, right?
 
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