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thendrix 
Orange Level
Joined: 04 Feb 2013
Location: Fairmount GA
Points: 5115
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 Topic: CA lift won't go down
Posted: 24 Jan 2018 at 3:37pm |
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The lift on my CA won't go down. It raised fine. I put the valve in the lower position and pushed hard enough to lift my feet off the ground and it won't drop and I weigh about 220. I'm assuming I have a valve stuck. Any thoughts?
Edited by thendrix - 24 Jan 2018 at 3:38pm
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"Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24781
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Posted: 24 Jan 2018 at 3:42pm |
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it took me 3 tries to get ALL the 'crud' outta the pump on my CA.
stuff I remember
1) have a well lit bench
2)clean everything 3 times, maybe 4
3) have a good blowup of the pump
4) take pictures before and during, just in case
5) if one of them check balls 'takes a walkabout', anything less than 2 hrs to find it is GOOD !
Jay
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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
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thendrix
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Joined: 04 Feb 2013
Location: Fairmount GA
Points: 5115
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Posted: 24 Jan 2018 at 3:48pm |
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That's what I was afraid of. Thanks Jay. BTW, that was fast. Barely 4 minutes to get an answer
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"Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan
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Bill Long
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Joined: 12 Sep 2009
Location: Bel Air, MD
Points: 4556
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Posted: 24 Jan 2018 at 3:56pm |
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You might try turning the screw on the end of the pump closest to the tractor rear end. That may move the valve train and perhaps allow the arms to go down. Don't put too much pressure on it but it may work.
Other than that listen closely to what is said above. I know If I can open them up and clean them good you can.
If you still have a gasket dam in the tractor you may just have to remove the oil from the PTO - there is a drain plug at the bottom and one on the bottom of the hyd pump. Try them first.
Good Luck!
Bill Long
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Dave in PA
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Joined: 13 Sep 2009
Location: Mars/Wexford PA
Points: 2628
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Posted: 24 Jan 2018 at 4:04pm |
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Best I can say is gain weight???? LOL sorry had to say.
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Hubnut
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Joined: 30 Jul 2014
Location: Gainesville, FL
Points: 1817
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Posted: 24 Jan 2018 at 6:01pm |
I had the same issue and did what Jay suggests. Here is a good disassembly of the pump. Helped me immensely. http://www.allischalmers.com/forum/ca-hydraulic-pump_topic28404.html
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1940 B "Lucy"
1941 B w/ Woods L59 "Flavia"
1942 B w/ finish mower "Dick"
1941 C w/ 3-point "Maggie"
1947 C SFW w/ L306 "Trixie"
1972 314H
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Gerald J.
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Location: Hamilton Co, IA
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Posted: 24 Jan 2018 at 6:05pm |
http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf Should give useful details on how it works and how to work on it. Gerald J.
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thendrix
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Joined: 04 Feb 2013
Location: Fairmount GA
Points: 5115
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Posted: 24 Jan 2018 at 8:02pm |
 Dave in PA wrote:
Best I can say is gain weight???? LOL sorry had to say. |
I've got enough of that as it is  Thanks everybody I'll see what I can find and report back
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"Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
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Posted: 25 Jan 2018 at 6:03am |
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It's actually NOT a bad job,kinda pleasent really.
just be sure to remove the oil from the sump FIRST.odds are real good it's full of sludge, maybe 40-50 YEARS worth....
once the pumps off and sitting in a tub of degreaser(tall coffee can?),get as much of the sump sludged outta there ! when you're bored of that, go to the well lit,totally clean bench and tear down the pump. be neat and tidy and it'll be easy. if you get bored of that, go back to cleaning the sump again, when you 'think' it's good enough, spray some brake cleaner in there..hmm..still got 'sludge' in there...it's one of those cleaner -is-better deals,so spend the time, done right you won't be in there for another 30-40 years. I used a 1/2" paint brush ,cut the bristles to only3/4" to clean the crud off the pump parts with some kind of 'dunk' degreaser, then varsol,dry off with old white socks. when the socks stay white you know the parts are clean !
The odds are real good the 40-50 years of sludge has finally 'caked' onto parts and plugged up holes 'here and there'.After all it's not like anyone 'cleans and refills' it every year....
Patience is the key.
Jay
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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
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