Farm Equipment - D17 Lift System

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D17 Lift System

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=184290
Printed Date: 28 Aug 2025 at 2:03am
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Topic: D17 Lift System

Posted By: nl_5728
Subject: D17 Lift System
Date Posted: 30 Oct 2021 at 5:27pm

Hello everyone! I'm new to this forum, please let me know if I've posted in the wrong spot.

Recently bought a Series 1 D17 for loader work - really nice machine, I love it. It came with all of the parts for a 3pt conversion on a pallet, but beings that I got it for loader work I never messed with the rear lift arms/snap coupler/etc. Got bored & put the 3pt conversion together today & I cannot get the lift arms to raise or lower by moving the lever by the steering wheel. When the tractor is started, the arms lift up about 2" but never can get up or downward movement from there. The tractor has the transport valve on the rear & adjusting that valve knob doesn't do anything for my lift arms. I do appear to have some (maybe not enough?) pressure on the line running to the transport valve. When I back out the set screw on the top it will spray hydraulic fluid. It has new fluid in the pump reservoir. Is there anything I can try to get my rear lift working? It would be nice to have the 3pt capability, even if it is just a bonus in my eyes.

Thanks,

Nick

Replies:

Posted By: DrAllis
Date Posted: 30 Oct 2021 at 8:16pm

If you have been raising AND lowering and using the loader with the Lift/Lower lever on the steering wheel without any issues, I don't understand why it won't raise the lift arms now. The Transport valve shouldn't leak regardless of where the screw is adjusted to and should have zero effect on using the loader. The sequence of operation is like this: loader and lift arms DOWN and engine running and foot clutch pedal released. Position the Lift/Lower lever UP to the top window. The lift arms should come up first and all the way to the top, THEN the loader will raise to whatever height you desire. The lift arms will always be fully UP whenever the loader is off the ground. There are many ways, and some of them strange, of people who have plumbed up their own idea of how D-17 hydraulics should be, which may change how yours works. The first thing I'd do is re-check your oil level because it sounds like it's very low on oil.

Posted By: nl_5728
Date Posted: 31 Oct 2021 at 9:19am

I should have been more specific with the loader. It is powered by an external pto pump & reservoir. Are you suggesting that I should fill the tractor hydraulic reservoir up past "full" on the dipstick? I guess there's always the possibility that the dipstick isn't correct & I'm running way low on fluid?

Posted By: DrAllis
Date Posted: 31 Oct 2021 at 3:49pm

When one doesn't have complete information to diagnose with, you'll get a bad answer. If your hydraulic compartment on the tractor (under the fuel tank on the right hand side) is FULL, it sounds like you may have hydraulic pump troubles. Your loader has its own system and has nothing to do with the lift arms.

Posted By: WF owner
Date Posted: 01 Nov 2021 at 5:37am

Is the three point hitch for the newer, lower pressure, higher flow hydraulics? If you are using a lift lever near the steering wheel, your D-17 is not a Series 4 and would have the old high pressure hydraulics.

Posted By: Scott B
Date Posted: 01 Nov 2021 at 12:21pm

I had to have the internal cylinders rebuilt on mine.

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D17 Series 1
Allis B- 1939
Allis B- 1945

Posted By: nl_5728
Date Posted: 05 Nov 2021 at 8:59am

Sorry about the hydraulic system confusion. Does the reservoir need to be completely full or just up to the line on the dipstick? It seems like my issue has boiled down to the pump or a ram cylinder based on everyone's feedback. Thanks everyone!

Posted By: DrAllis
Date Posted: 05 Nov 2021 at 12:06pm

The line on the dipstick is there for a reason. Keep an eye on the transmission oil level. If the hydraulic oil disappears (when using the hydraulics) and the transmission oil gains, you have a leaking lift arm cylinder and hose inside the rear end.

Posted By: AC720Man
Date Posted: 05 Nov 2021 at 6:59pm

WF, he states its a series I.

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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