CA hydraulics

Richard G.

Well-known Member
Friend just called about an Allis CA. Has the 2 lift arms with 2 cylinders and the quick hitch underneath.
Used it to move hay last year with a spear. This year, it will just barely lift a bale.
Any ideas on what to check?
He changed the hydraulic oil last year.
Richard in NW SC
 
Check the Hydraulic Fluid level. It is the big square plug by your left heel. Fill it as full as it will hold with universal hydraulic/transmission fluid. Another possibility if it is cold where you are and you have heavy gear oil in the transmission then it will be slow and weak. If that is the cause drain the transmission (forgot hoe many plugs on the bottom) and refill with Universal transmission fluid which is about 20 wt.
 
Another possibility if it is cold there you may have had water infiltration into the tranny and ice has formed, if do take the tractor th where it is warm and drain and refill the tranny. Note The tranny and hydraulic fluid reservoir and one and the same for the CA
 
Are we sure the bales aren't heavier this year over last year??? Good Lord, I can't imagine a CA would pickup very much anyway.
 
20W non detergent engine oil is what AC called for originally.I use 30W high detergent engine oil in mine,because I figure a 60+ year old hydraulic system has some wear in it
and the high detergent oil will keep the parts clean.If it was my tractor I'd add a can of Seafoam and some varsol or diesel fuel to the transmission/rear work the hydraulics,drive it some and get everything mixed up and warmed up.Then I'd drain it and put in some 30W high detergent oil.
 
Same hydraulic pump as a WD,the size of the tractor is the limiting factor,their hydraulic system will easily lift the front end off the ground if the weight on the rear hitch is heavy enough to hold it down.Most 4X4 bales are under 400 lbs so a CA can handle that.
 
Thanks Gary. So the rear end and hydraulics are the same fluid?
I would have thought the rear end would need a heavy gear oil.
Richard
 
Its all together and I guess the engine oil does good lubing the rear as I've seen some totally worn out CA,B and C tractors and the rears/trans were fine.They did use gear grease in the very first B tractors with out hydraulics.Also on top of the pump there are some nuts that hold the balls in place if they aren't seating the hydraulics won't work right.He can take them off and spray with something like PB Blaster to free them up but be careful when taking them out as they are spring loaded.A broken spring will also cause the hydraulics to malfunction.
 
Also another problem I have seen is the center of one of the cam rollers that are driven off the PTO shaft has worn out and this causes the pump not to work correctly,but that's the last thing to try as the pump has to be taken off to look about that.99% of the time with those pumps its something being gummed a little inside the pump.
 
Keep a good boot on the shift lever or you will have water in the trans/rear end if you are out in the rain or snow.
 

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