Farm Equipment - D14 hydraulic won't stay up

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D14 hydraulic won't stay up

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=133437
Printed Date: 05 Nov 2025 at 12:20pm
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Topic: D14 hydraulic won't stay up

Posted By: mike 44
Subject: D14 hydraulic won't stay up
Date Posted: 05 Jan 2017 at 4:10pm

My lift arms keep falling down when I'm trying to push snow any suggestions? They won't stay up thanks

Replies:

Posted By: jaybmiller
Date Posted: 05 Jan 2017 at 4:22pm

Eat more Spinach ???

Yes, I've got 2 that have that problem...
causes are
1) bad seal in rockshaft cylinder
2) bad hydraulic hose
3) bad check valve in hydraulic pump

1 and 2 require you to remove rockshaft and get 'inside'. Be SURE to pull BOTH plugs on belly...rear end(diff) will be FULL of oil, so put 5 gallon pail underneath AND have another nearby. Mine had 7 gallons in it....PTO shaft needs to come out(that's easy, but be real careful putting it back it or you'll destroy a shaft seal waaay inside the beast!

#3 is what I now have,means removing pump,cleaning it, replacing it.....maybe in the middle of summer......

I 'recycled' the lift oil for 3-4 years until I broke down and tore into it. Not a bad job,some things to know and be careful ,rockshaft is heavy !

Jay

Jay

-------------
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

Posted By: MACK
Date Posted: 05 Jan 2017 at 4:52pm

Could be just pulling lever down too far. If it is seals or hose it will run out of hydraulic oil pretty quick. How long will blade stay up with engine off? MACK

Posted By: mike 44
Date Posted: 05 Jan 2017 at 10:22pm

It won't put the lever up and blade falls rite down

Posted By: Clay
Date Posted: 06 Jan 2017 at 12:30pm

Put some synthetic Viagra oil in the system.

If that does not work, replace the oil with C-Allis.

Posted By: shameless (ne)
Date Posted: 06 Jan 2017 at 2:24pm

well....if the blade falls when you pull the lever up to raise, when does the arms lift?

Posted By: mike 44
Date Posted: 06 Jan 2017 at 3:25pm

I pull lever up they raise but if I let go of it down they come unless I lock it they will stay all the way up

Posted By: DrAllis
Date Posted: 06 Jan 2017 at 4:12pm

If your hydraulic and transmission oil levels stay OK, sounds like a bad hold valve on the pump.

Posted By: Dan73
Date Posted: 06 Jan 2017 at 4:17pm

I was wonder about the seal in the cylinder but I would check the valve first.

Posted By: mike 44
Date Posted: 07 Jan 2017 at 6:45am

Thanks