185 3 point lift issue
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=208011
Printed Date: 03 Sep 2025 at 8:44am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 185 3 point lift issue
Posted By: AC720Man
Subject: 185 3 point lift issue
Date Posted: 31 Aug 2025 at 11:39am
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Helping my friend diagnose his 185 lift arm issue. it has blown the seals in both lift cylinders, left side first and now the right side is leaking bad. I haven't been around this tractor in 30 years when I ran it for his grandfather pulling gravity wagons during the harvest season. It hasn't seen much use in the last 20 years since his grandfather passed away. Anyway, I stopped by to see if I could figure out what was going on. He doesn't use the lift arms anymore and after blowing the seals out of the left side he just unhooked the line to the left cylinder and put a plug on the end of the hose. Not the right decision but he did that to get by until he had time to remove and have the cylinder replaced. Using the tractor to pull the square baler or wagons. A month later the right side cylinder started puking fluid. So I got on the tractor, made sure the lift arm control was in the neutral/no lift position and started the engine. the lift arms began to raise, so I moved it to the float position and they still came up. Once they came all the way up it began puking fluid out of the cylinder seals. It appears to me as if it is stuck in constant lift mode. The control rod is moving the control valve through its stroke and feels normal. He doesn't have a service manual on the 185 so I don't have anything to refer to. I'm thinking maybe something is stuck inside the valve body causing it to be in full lift no matter what position the control rod in which blew the seals out? Seams like I remember someone mentioning placing a screwdriver in the access hole on the back of the control valve(bumper plug)and pushing in on the spring to see if its stuck? Is this correct or what do you suggest to figure this out. This has to be hard on the pump and its hard to tell how long he ran it in this condition. I would have suspected a noticable change in the engine and pump sound as it was dead heading the pump? But he said he had not noticed any change. Thanks in advance for your help ------------- 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 |
Replies:
Posted By: SteveM C/IL
Date Posted: 31 Aug 2025 at 2:38pm
| Better be checking the relief setting. Those aluminum pumps split open when stressed. |
Posted By: Boman
Date Posted: 31 Aug 2025 at 4:04pm
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Not to hijack this post but does anyone know the collapsed length of the top link on a 190? None of my aftermarket ones go short enough, off by about 3 inches |
Posted By: 8070nc
Date Posted: 31 Aug 2025 at 5:34pm
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If the position control or traction buster levers are to the back it will do that. Or the traction booster spool or linkage could be stuck ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: 8070nc
Date Posted: 31 Aug 2025 at 5:37pm
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Traction booster not buster. Darn spell check. Im gonna turn it off. It does things behind my back ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: 8070nc
Date Posted: 31 Aug 2025 at 5:41pm
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After rereading your post its more than likely the traction booster spool or linkage stuck. If the position control is adjused right it wont dead head the pump ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: AC720Man
Date Posted: 31 Aug 2025 at 7:18pm
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I will check the traction booster lever, I did not see if that lever was working properly. ------------- 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: DrAllis
Date Posted: 01 Sep 2025 at 8:10am
| It sure sounds like "stuck" Traction Booster OR Position Control linkage under the hyd console, with the linkage finger holding the hyd spool "in" causing it to raise the hitch all the time. The relief valve for this circuit is set to 2100 PSI and I have never seen a relief valve of this design ever fail to a higher pressure. They always blow an Oring internally, and then they don't make 2100 psi any more. 40 year old lift cylinder seals with 2100 psi against them constantly can make them fail, not from too much pressure (2100) but from constant pressure and old age. I've never understood how an operator doesn't notice when the hitch gets to the top of its travel, that there is now a hissing sound coming from the console area. That is the sound of the relief valve doing its job and a clue that there is something wrong. BOTH rear hyd levers need to be fully forward, but that doesn't mean the linkage underneath isn't stuck anyway. Remove the short aluminum cap/cover (and spring) at the right rear of the hyd stack and with a large diameter punch and hammer tap the spool fully forward until it hits the snap ring. Replace the cover and spring and leave the hyd levers fully forward and you are fixed until the next time someone pulls those levers back. |
Posted By: DSeries4
Date Posted: 01 Sep 2025 at 8:54am
Don't check the lever. Check the linkage. There are 2 or 3 pivot points. If one of them doesn't move by hand, you will have issues. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
AC720Man wrote:Posted By: AC720Man
Date Posted: 01 Sep 2025 at 8:06pm
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Thanks for the replies, it will be this coming weekend before I can get back to it. I will let you know what I find out. ------------- 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 |