Hydraulic spool valve help
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=177609
Printed Date: 28 Apr 2024 at 4:30am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Hydraulic spool valve help
Posted By: Ken stanwood
Subject: Hydraulic spool valve help
Date Posted: 17 Jan 2021 at 3:50pm
I have a D15 commercial with a loader. the spool valve is broken and not repairable. It has a port on the back of the valve that fits over a pipe that sticks out of the reservoir (the loader support) and is sealed by a rubber washer when the valve is bolted up. I could not find a replacement valve the same. Is this a return, or some kind of pressure relief? Is seems I can just plumb the valve without this and block off the pipe sticking out of the reservoir. |
Replies:
Posted By: Ken stanwood
Date Posted: 17 Jan 2021 at 3:51pm
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Posted By: Ken stanwood
Date Posted: 17 Jan 2021 at 3:54pm
Here is the front of the valve
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Posted By: Jim.ME
Date Posted: 18 Jan 2021 at 4:51pm
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Without seeing your valve and figuring out just how it is ported to be certain, I will guess that port into the reservoir, which the valve slides over, is the oil return for the system. You should have a supply line coming from the pump and you need a return to reservoir. If it doesn't have a dedicated return hose, between the valve and reservoir, that port is the system return point. You will need to make a mounting bracket for the valve and since the new valve will most likely have a port for a return hose, you will need to have a place to connect that return hose to the reservoir. You could modify that port to accept a hose or make another port and plug that one.
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Posted By: Ken stanwood
Date Posted: 18 Jan 2021 at 11:07pm
| The original valve does have a return port. |
Posted By: Ken stanwood
Date Posted: 18 Jan 2021 at 11:09pm
| Thank you for helping. |
Posted By: Jim.ME
Date Posted: 19 Jan 2021 at 5:22am
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Since your existing valve already has a separate return hose you can use that for the return from the new valve and plug the port, shown in your pictures under the old valve.
You didn't say, and I didn't ask, but is this just a loader tractor or does it have a backhoe on it as well? That could make a difference if there is a power beyond set up.
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Posted By: Ken stanwood
Date Posted: 19 Jan 2021 at 11:10pm
| I think it may have had a hoe on back in a different life but not now. |
Posted By: Coke-in-MN
Date Posted: 21 Jan 2021 at 11:14am
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Is it a open center valve body with that being the return line back for flow when NO supply is needed to cylinders ? A valve body with how many outlet ports ? Big thing is getting a valve body rated for the pump capacity along with if oil is ported so as to have regenerative circuit within . AC used a retentive system where oil from one movement of cylinders flowed into opposite end of cylinder when designing their backhoe operation. ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |