Farm Equipment - CA Hydraulic Pump Priming Method

CA Hydraulic Pump Priming Method

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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=203638
Printed Date: 27 Oct 2024 at 5:32am
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Topic: CA Hydraulic Pump Priming Method

Posted By: dfwallis
Subject: CA Hydraulic Pump Priming Method
Date Posted: 13 Oct 2024 at 10:30am

I had tried filling the pump before installing it, but without a check valve on the inlet (like later models), of course it ran out the inlet quickly before I completed the install. What would be the best route to priming the pump given it never had a check valve on the inlet? Should I remove the control valve after install and fill from the top? Try filling from one of the output lines? Should there even be such a problem with this older configuration?I'm certain there was plenty of oil in the inlet. The oil runs into the pump inlet even before oil shows up on the dip stick and the transmission case was full to the 'rams extended' level.

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1952 CA13092

Replies:

Posted By: AC720Man
Date Posted: 13 Oct 2024 at 8:05pm

We just installed front and rear cultivators on our CA last week and couldn’t get the pump to lift them. Loosened the cap at the rear remote(ours doesn’t have a Pioneer coupler on it) to bleed the air out of the system. Now it lifts just fine.

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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD

Posted By: dfwallis
Date Posted: 26 Oct 2024 at 11:45am

Status Update: The AGCO guy found a burr that was messing with the control valve operation. He also replaced the broken control valve spring with one from a WD pump. The broken one (what was left) was about 4 inches in length. Supposed to be 7 inches in length per one source.

Anyway, although it took a considerable time to prime, it now raises, slowly, but does not seem to want to lower as long as the pump is running, although with the control lever down, you can apply quite a bit of force and push it down part way (with pump running). It goes down fine with the pump not running and the handle down. Initially, with the handle lowered, it slowly crept up. It seemed to get slightly better as the test progressed. With the handle all the way up, it seems to be applying maximum force (even if that may be a diminished maximum).

He did not replace the gasket on the front end (flow control adjustment). He thought it would not leak there, but leaks quite profusely. Also leaking around the check valve fittings. I suspect he didn't tighten them or the copper seals need replacing.

I've seen postings with similar behavior, but haven't had time to review. Ideas?

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1952 CA13092

Posted By: dfwallis
Date Posted: 26 Oct 2024 at 8:20pm

The traction booster linkage is misadjusted...will see whether that helps tomorrow.

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1952 CA13092

Posted By: steve(ill)
Date Posted: 26 Oct 2024 at 10:08pm

you need a plow or blade on the back to get the arms to drop ... you might be able to stand on the lower arm and get it to drop..

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Like them all, but love the "B"s.

Posted By: dfwallis
Date Posted: 27 Oct 2024 at 12:59am

I had about 100lbs hanging on it plus pushing down by hand. But I'll try more

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1952 CA13092