Loader rams hydraulic fluid change
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=154935
Printed Date: 22 Aug 2025 at 3:17pm
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Topic: Loader rams hydraulic fluid change
Posted By: Jamz
Subject: Loader rams hydraulic fluid change
Date Posted: 20 Oct 2018 at 6:48pm
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I have a 190 with HY-TRAN hydraulic transmission oil in the hydraulic system. I bought a Dual D70-1539 loader to mount on it. The loader had it's own controls which I removed so it can be hooked up to the remote ram controls on the tractor. The loader looks like it has motor oil in it's lines and rams and I assume I need to replace that with the same fluid that the tractor has. All the rams are double acting and currently fully retracted....... I got questions about doing this hoping someone can help......  1) does the fluid in the loader rams and lines actually cycle thru the tractor's system ? 2) if so, how do I get the old fluid out ? 3) how do get the new fluid in ? |
Replies:
Posted By: DiyDave
Date Posted: 20 Oct 2018 at 8:52pm
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1) yes 2) just use it for a hundred hours or so, old will mix with new... 3) when you change the tractor's hyd fluid, via the plug at the bottom of the compartment. A filter change will be in order, too... Oil is added at the hyd dipstick cap. Hytran is just a single weight oil, with some antifoam and detergents, otherwise very similar to 30 weight oil, IIRR...
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Posted By: AaronSEIA
Date Posted: 21 Oct 2018 at 6:40am
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Yes. You can take the cylinders off, remove the hoses, and use an air compressor to cycle the cylinders and blow the hoses out. Or you can do what Dave suggested. I'd run the loader all the way down and curl the bucket all the way up. Unhook the rod end of the hoses. Run the loader all the way up and dump the bucket all the way. Let it back down, rehook the hoses, and cycle everything a few times to get the air out. AaronSEIA |
Posted By: Jamz
Date Posted: 21 Oct 2018 at 8:34am
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Hey thanks Dave! The Hytran that's in the tractor now was a recent oil and filter change. I'm new at the tractor and remote hydraulics thing so tell me if I'm thinking right..... 1) I'll connect all the lines and gradually add more fluid to the reservoir as I cycle the rams in and out ....till the dipstick says full .....with the loader rams retracted. 2) The tractor system capacity is 6 to 9 gal. The rams on the loader are quite large...do I need to be concerned that there may not be enough fluid to operate the steering, the 3 point lift arm rams, the power director and pto clutches ....and the loader rams if fully extended ? 2) Do I need to bleed air out of the loader system during the process somehow.... like you would a truck's brake line system or does the tractor's system remove the air ? Sorry for all the questions but I'd rather look stupid now than do something wrong and wreck somethin.
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Posted By: DrAllis
Date Posted: 21 Oct 2018 at 8:42am
| Tractors hydraulic system is between 5 and 6 gallons total. If you are going to empty your loader cylinders, I'd probably pour 1 to 2 gallons extra in the tractor to start with, because it is quickly going to disappear into the loader cylinders. Operate the loader up/down-dump/roll back fully several times to "bleed" out the air. With tractor and loader on level ground and bucket flat, recheck hydraulic oil AFTER sitting for at least 15 minutes. If your hydraulic system is "full", I doubt you will have any trouble operating the loader to full height, because 2-way rams don't really remove very much oil from the system, as they return almost the same volume as they remove. |
Posted By: Jamz
Date Posted: 21 Oct 2018 at 3:51pm
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OK....thanks guys ! |
Posted By: Jamz
Date Posted: 02 Nov 2018 at 12:23pm
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OK......I got the loader hung up and blocked up in the approximate position for mounting with enough room to fully extend the rams while attached. The bucket is not attached. The rams do extend and retract fully with no leaks. Question 1) the right side bucket cylinder doesn't extend until the other one is all the way out and retracts slower until the other one is all the way in. My son-in-law says this is normal with no load or bucket attached to it, that the difference is the friction at the seals. I'm concerned that both cylinders might not do the work evenly to operate the bucket. Is it true that this normal ??? Question 2) I can't find any reference for the Model number on the metal tag "DU-AL D70-1539 Souix Falls SD" It looks very similar if not identical to one of the DU-AL 300, 320 and 325 loaders the I see photos of. Does anyone know what the scoop is and if there are any specs available for my D70 ?
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Posted By: allisrutledge
Date Posted: 02 Nov 2018 at 1:10pm
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For once your son in law is correct. Don't know about the bucket ------------- Allis Chalmers still exist in my mind and barns |
Posted By: Jamz
Date Posted: 02 Nov 2018 at 6:06pm
 I'll tell him you said that, thanks !
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Posted By: Jamz
Date Posted: 05 Nov 2018 at 6:21am
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Hey guys, thanks for all your help, just to let you know, I added 1 gal of hydraulic fluid before cycling the retracted cylinders and almost 2 gal afterwards to bring it up to the full mark. I'm gonna try one more time if you don't mind.....does anybody have any information or know anybody who might have info on the DU-AL D70 loader ? years of manufacture ? specs re: lift capacity....horsepower range of tractor ? From more photos found, it appears to be heavier than the 325 model I see mounted on an Allis 190 like mine.
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Posted By: dakotawc
Date Posted: 05 Nov 2018 at 7:13am
| 320 dual was a short arm loader for a side mount tractor. 325 was a long arm loader for a rear mount tractor. They were made in wide frame (for jd 2 cyl tractors) and standard width for everything else. These had orange cylinders with packing seals. Newer models 340 and 345 had blue cylinders with o-ring seals. If you have one that does not leak you have a rare find! HA! |