CA Lift Arm Question
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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=128975
Printed Date: 29 May 2025 at 12:42am
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Topic: CA Lift Arm Question
Posted By: Cernunnos
Subject: CA Lift Arm Question
Date Posted: 19 Sep 2016 at 7:38pm
I was using my CA to brush mow and was utilizing the remote ram connection. When I lifted the implement the lift arms also went up, but when lowering the implement, the lift arms would remain in the up position. After removing the implement from the remote, I could not get the lift arms to depress, even after standing on them. I had to hook up to two CA rear wheel weights with a chain to each lift latch in order to finally get the lift arm rams to lower. After getting them to lower, I raised them up and then lowered them to see if gravity would depress them which did not happen but at least now I could depress them by pulling them down by hand. I then went discing with the CA and had no problem raising the disc and then having the rams come down with the weight of the disc.A few questions: 1) When using the remote, should the hydraulic pump be set for drawbar, hold or delayed lift position, and if so, did I have it set wrong (It was on drawbar control). 2) Is there something wrong with the internals of the pump to cause this to happen or could it be a hydraulic pump setting error?
Thanks in advance.
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1951 CA, 1952 CA with cultivator, 20 Series 8' disc harrow, 2 bottom pick-up plow, forage blower, 2-row rear mounted drill corn planter, Allcrop grain drill, No. 80T sickle mower, MN No. 130 barge box
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Replies:
Posted By: CTuckerNWIL
Date Posted: 19 Sep 2016 at 7:54pm
1) Hold but it's no really necessary.
2) Nothing wrong with the pump . The output of the pump goes directly to both cylinders and the remote connection. The only way to separate the lift arms from the remote would be to add a diverter valve to physically stop the lift arm cylinders from getting pressure while the remote would get it.
The cylinders will not go down without weight on them, that is normal.
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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Posted By: Cernunnos
Date Posted: 19 Sep 2016 at 8:32pm
Thanks for the information Mr. Tucker. What I am concerned with, however, is the amount of weight required to get the lift arms to depress. They used to depress just by gravity or a little bit of pressure, but this time it required the mass of two rear wheel weights! That would not be normal, would it?
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1951 CA, 1952 CA with cultivator, 20 Series 8' disc harrow, 2 bottom pick-up plow, forage blower, 2-row rear mounted drill corn planter, Allcrop grain drill, No. 80T sickle mower, MN No. 130 barge box
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Posted By: PaulB
Date Posted: 19 Sep 2016 at 9:55pm
If there is no need for the lift arms they can be pinned in the far down position the same as when installing the pin hitch drawbar, I do this on my CA with the loader.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Posted By: Dakota Dave
Date Posted: 20 Sep 2016 at 9:11am
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You should pin the arms down when using the remote. The lift arms with no weight ar less resistance than the remote ram that is doing work it will go all the way up and not come back down till all the pressure is off the remote. On my CA I found that the Rams would stick up and be very hard to lower when raised repeatedly without weight on them. I think the seals expand some when at full extension with pressure still being applied against no load. After using it again with a mower on the three point the loosened back up and I could push them down by hand again. If disconnect your Rams when fully retracted. You can point the lift arm straight down and pin the Rams in the upper hole. They are then locked out and you don't need to wait for them to extend before your remote operates. The Rams are then pushing against an immovable object an require no volume since they can't move. I pinned my left side when rotating the right side foward to operate the mower lift.
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Posted By: Cernunnos
Date Posted: 20 Sep 2016 at 10:11am
That sounds like great information guys. I'll be sure to do that in the future. Thanks for the help.
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1951 CA, 1952 CA with cultivator, 20 Series 8' disc harrow, 2 bottom pick-up plow, forage blower, 2-row rear mounted drill corn planter, Allcrop grain drill, No. 80T sickle mower, MN No. 130 barge box
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Posted By: Gary Burnett
Date Posted: 20 Sep 2016 at 11:18am
I'll add that's a pretty common problem with the CA the worst one we ever had was one Dad bought back in the late 50's if we ever engaged the PTO with the arms up and the hydraulic control lever in the raise position it'd be awhile before we could get the arms down.We figured it was probably air locked,the current CA I have 'knock on wood'
never does it although I keep the arms pinned down most of the time just to have them out of the way.
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