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Farmall & IHC Tractors Discussion Forum
:

Farmall 460 hydraulic pick up

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Dcjr

02-14-2020 05:41:20




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I have a Farmall 460 that I'm having some trouble with. When I fill the rear end with hi Tran to the check plug the oil still seems low. When I pull the filter housing off his only about half full. I see the hole in the casting that goes back to the rear end where the filter would get its oil from. When the rear end is filled with 10 gallons as calls for, the oil is not even running into the filter housing. This is giving me cavitation in the pump. Added three more gallons and it's barely trickling in ,so the pump is still cavitating. My question is doesn't the pickup tube hole for the pump behind the filter have to be completely underoil??

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charlieu

02-15-2020 16:18:53




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
You said that you have had the pump out twice and the O-ring looks fine... What about the leather seal that is on the short jumper tube? That seal has to be good or it will suck air out of the TA housing. The part number has changed a few times. The latest number is 395334R91 according to my notes in my 460 parts book. This seal has to be good. Don't ask how I know. BTDT



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CenTex Farmall

02-14-2020 19:45:26




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
Have you taken the pto out?
On my 460, iirc, there is a tube from the filter housing part of the casting that goes downward toward the middle of the rear case.



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Dcjr

02-14-2020 11:29:06




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
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Yes I have had to pump out twice and check the o-ring everything seems fine I should have the new one today just for the hell of it to replace it and see what happens



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Dcjr

02-14-2020 08:11:44




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
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Excellent information thank you very much!



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pete 23

02-14-2020 11:16:52




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 08:11:44  
Did you have the pump out? If so, that seal on that tube is very touchy and has to seal nice and snug in the groove in the housing. The seal is movable on the tube so when installing a new tube or pump, one has to position the seal on the tube . Also, it is easily damaged when installing pump.

The tube is somewhat visable from the filter side through passage to other side but there is no tube on filter side. Tube in rear frame is sealed with an o-ring between the two main housings. In the split. Tube is also bolted down and often times breaks loose. But, just a poor gasket seal on filter will suck a lot of air also and often overlooked.

Over filling a 460 does very little as it is really tough to cover those suction points. Not like the large frame tractors. Even on them, the main advantage is higher oil level makes the front pump on them not have to draw the oil up such a big hill so to speak so they prime up easier.

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Dcjr

02-14-2020 07:53:31




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
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is there supposed to be a tube on the filter side when you take the 6- bolt oval-shaped side off that goes into the rear housing? I just acquired this tractor and I'm trying to figure out the hydraulics.when I first opened that plate to check the filter there was no filter in it the only tube I have is the short jumper tube that goes from the pump into the cast housing, how is the oil supposed to get from the rear end to the pump housing? Am I missing a tube? Thanks again

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DeltaRed

02-14-2020 08:03:37




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 07:53:31  
Yes,there is a pickup tube. You cant see it as it is inside. You can see the suction hole from the filter cavity.Overfilling the rearend simply submerges the suction tube. Any cracks are now under oil,so instead of sucking air,it sucks oil.However,be aware,overfilling can sometimes cause premature axle seal failure.Happens,but not often.Overfilling is a common 'fix' on 06/56/66 series tractors.



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Pete 23

02-14-2020 07:30:06




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
No the tube is not supposed to be full. When you remove filter only the filter should drain like a couple quarts. You are sucking air.

Three common spots are, around filter cover gasket. Main suction tube going into rear(at o ring in split or broken loose tube bracket) or the suction tube at the pump.

460 holds right at 8 gals.



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Dcjr

02-14-2020 07:15:29




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
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So I'm not losing my mind the pickup tube should be totally submerged correct? Thanks for the response



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DeltaRed

02-14-2020 07:00:33




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 Re: Farmall 460 hydraulic pick up in reply to Dcjr, 02-14-2020 05:41:20  
Pickup tube is either cracked,or separated.Easy 'fix' is to add 3 extra gallons of oil.Get the oil level up above the filter. If that doesn't work,time to tear it apart.



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