180 Leaking Lift-Arm Valve
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=207064
Printed Date: 14 Jun 2025 at 8:10pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 180 Leaking Lift-Arm Valve
Posted By: DanielW
Subject: 180 Leaking Lift-Arm Valve
Date Posted: 10 Jun 2025 at 7:26am
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Hi folks, My 180 has started leaking hydraulic fluid out of the rear valve spool cap for the lift arms - leaking out of the plug #23 in the picture below. It's a slow drip when the arms aren't being used, but has progressed to a steady stream when they're being operated - especially under a heavy load like my bale wrapper. I'm hoping it's just a dried-up/perished o-ring, and I'll be able to fix by replacing the o-rings #6, 16, 26, and 27. Does this sound like a reasonable first step? Is there anything I should be concerned apart when disassembling that valve body? It looks like the spool has four ball bearing detents that sit inside collar #17, and I'll bet I have to be careful to not lose those and disassemble it carefully and cleanly. But apart from that I'm thinking (hoping) it will be straight forward? Any thoughts greatly appreciated.  |
Replies:
Posted By: DrAllis
Date Posted: 13 Jun 2025 at 4:55pm
| #20 I gave up years ago trying to use a screwdriver to loosen or tighten. I use a vise-grips by sliding the spring cup ahead and having the other end of the spool correctly clamped in a vise. The detent balls are a problem !!! especially if you've never dealt with them before. #27 I try to avoid replacing unless I have to. You'll see why if you do. |
Posted By: DanielW
Date Posted: 13 Jun 2025 at 6:50pm
| Thanks Doc! Got it done yesterday, and just like you I used vice grips on #20. Didn't remove the detent adjustment set-screw (#21) as the whole end under the cap was very much rusted and seized. Probably could have got it with the right careful application of heat, but I was worried if it didn't loosen, then I'd have melted the #27 o-ring with no way of replacing it. And because I need this tractor for baling and wrapping in the near future. I didn't want to risk it. So far so good, o-ring #6 was definitely scarred. |
Posted By: randy
Date Posted: 13 Jun 2025 at 9:47pm
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Mine is leaking out the hole also. Is there a step by step on how to fix it somewhere? ------------- CA WD WD45 D17 D17 Diesel 7060 8050 8070 |
Posted By: DrAllis
Date Posted: 14 Jun 2025 at 7:59am
| I'm sure in the official AC service manual there are some instructions. An I & T manual you'd need to buy a 170-175-180-185-190 book, not a D-17 book. Disconnect the control lever clip and pin at the front of the leaking spool. Clean this area well from any dirt. Remove the two long Allen head bolts (with spacers) at the rear; Remove the long cover. Grab hold of what remains and gently pull and twist and the whole spool comes out. Wrap the assembly with a clean rag to contain things. Be careful what you do and don't mess with or lose any detent balls. |
Posted By: DSeries4
Date Posted: 14 Jun 2025 at 9:03am
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AGCO has a kit of new seals and O rings to reseal the valve body. Used it on my 190 6 years ago and has not leaked since. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: Gary(VA)
Date Posted: 14 Jun 2025 at 11:39am
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I need todo this also Does the valve need to be removed or can it be done in place. Mine has a cab on it |
Posted By: DrAllis
Date Posted: 14 Jun 2025 at 5:35pm
| A valve section can be done in chassis, except for the in-between the sections O rings. So, you have to determine where the leak is originating from. |