Farm Equipment - 460 loader control valve options

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460 loader control valve options

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=209466
Printed Date: 24 Dec 2025 at 11:40pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 460 loader control valve options

Posted By: farmtechguy
Subject: 460 loader control valve options
Date Posted: 24 Dec 2025 at 10:36am

Greetings,

I acquired a 160 diesel with (I believe) an OEM 460 loader the other day. After using the loader a bit it's apparent I have an internal hydraulic leak as the bucket slowly sinks with a load in it.

I'm inclined to think it's in the control valve. When I go to lift the bucket, if I only open the valve ever so slightly, the loader drops. Once I open the valve enough, it lifts just fine.

My question is: couldn't I just replace the valve with a cheaper universal spool valve from ebay? I'm sure the cylinders could use a seal job as well.

Your input is much appreciated!

Replies:

Posted By: ac160
Date Posted: 24 Dec 2025 at 11:29am

Try changing the packing in the cylinders first. I have a 460 loader on a 6070 that leaked down with or without a load, and new packing solved that issue. There were two versions of the 460 loader, one for a 160 and the other for the 6060 - 6080.

Posted By: Ray54
Date Posted: 24 Dec 2025 at 1:08pm

I would agree start with the cylinders first. But there is a no tools required way to check. When you first start the tractor run the loader up and let it leak down a number of times. As it is lowering put your hand on it, the bypassing oil will create heat. If you cannot feel any warming of the cylinder, then the valve is your leak.

Posted By: farmtechguy
Date Posted: 24 Dec 2025 at 1:53pm

Thanks for the replies. I picked up a 4x5 round bale and definitely have gland seal leaks on two of the cylinders. I'll do the test you describe here in a little bit and report back.

Do you guys think an internal cylinder leak could be the cause of the "dead" spot when opening the control valves? It's pretty bad when I it loaded up.