D14 Hydraulic Transport Valve
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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=148527
Printed Date: 15 Aug 2025 at 6:47pm
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Topic: D14 Hydraulic Transport Valve
Posted By: r8f1k
Subject: D14 Hydraulic Transport Valve
Date Posted: 16 Mar 2018 at 8:07am
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How do you get 2 way hydraulics on a transport valve system? I am just looking for a pressure and return. I know the system will make certain cylinders work slower, don't really care. Just looking to use my 2 way cylinders with my D14. I am also looking for an "elegant" way to do it. Something neat and clean. Ideas?
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Replies:
Posted By: DrAllis
Date Posted: 16 Mar 2018 at 8:24am
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Mount your 2-way valve/valves to the left of the seat. Use a hydraulic hose to connect to your existing outlet for the "feed" into the 2-way valve/valves. Your existing steel return line back to sump will have to be teed into for return oil out of the 2-way valves. Now, when you want 2-way hydraulics, you simply plug in the hose. You want 1-way high pressure hydraulics....unplug the hose and use the existing outlet. For elegance, chrome the control handle on the 2-way valve.
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Posted By: jaybmiller
Date Posted: 16 Mar 2018 at 8:27am
first thing you need to understand is that the D-14 has 3,500PSI hydraulics so you need HIGH PRESSURE cylinders. If you have them, just add a 3 way spool valve onb top of the roackshaft and plumb it in. The 'parts manual' has drawings of the official parts.pieces and install.
I'm sure others can offer knowledge. I know 'Troy' here has a 3/8" hole int he left side of the 'pump sump' that someone used as the return line to get oil back into the sump.
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Posted By: r8f1k
Date Posted: 16 Mar 2018 at 9:33am
Posted By: john(MI)
Date Posted: 16 Mar 2018 at 10:18am
I put an el in the return hole on the left side of the sump, just in front of the clutch pedal. I then ran a rubber line to the rear, with a quick disconnect on the end. I ran a backhoe with it and it did a real nice job. It didn't seem to be running slow to me.
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D14, D17, 5020, 612H, CASE 446
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Posted By: r8f1k
Date Posted: 16 Mar 2018 at 1:02pm
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Did you run an "L" or a "T"? Right now there is an "L" going to the pump, another "L" won't do much.......Can I plug the return port on the transport valve and plumb a quick disconnect right onto that return line?
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Posted By: john(MI)
Date Posted: 16 Mar 2018 at 2:50pm
There is a pipe plug on the left side just ahead of the clutch. That port is for return. Take that out and put an el in that hole and proceed from there. I just tie wrapped a rubber hose along the steel pressure line going to the rear. I guess if you wanted to get fancy, you could try to find some of the steel tube the size of the pressure line and run it back there. I bet that size of steel line would be a real pain to bend.
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D14, D17, 5020, 612H, CASE 446
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Posted By: DrAllis
Date Posted: 16 Mar 2018 at 4:04pm
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He already has an elbow in that port ahead of the clutch pedal because he has a transport valve on it. Remove the elbow for the return at the transport valve (use two wrenches so you don't crush the elbow fitting) and install a tee between the elbow and the transport valve. Use the existing steel line to return your 2-way valve oil. You can make the steel line reconnect after installing the new tee. Use as short of a tee connection as possible.
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Posted By: r8f1k
Date Posted: 17 Mar 2018 at 8:25am
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Got it. I will get to work!
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