Farmall 856 lose of TA hydraulic pressure.

FarmallKid856 · May 25, 2016

I bought a 856 about a month ago and when i got it nothing on it electrical worked so i got to work fixing that and am happy to report that all lights and gages now work but the light for the pressure on the TA works as it should with the TA in the back position(comes on when you press the clutch and goes out before the clutch grabs and you move) but when you put the TA forward it stays on and wont go out, what could be causing that it will go out if you pull back on the TA far enough that plunger is up about 1/4 of an inch so is it a valve or something leaking i really dont know anything about TAs so im lost. The guy told me when i bought it that he had put a new clutch and TA in it. Also all the hydraulics work as far as steering and brakes and the tractor runs great with TA forward and back so im not sure why the light is staying on when TA is forward. Thanks for any help anyone can provide.

cornerpost · May 25, 2016

Gauges needed. Afraid you have a leak in high side circuit to direct drive clutch pack.

FarmallKid856 · May 25, 2016

ok thank you, how would i go about checking this and fixing it

FarmallKid856 · May 25, 2016

How do i check where its leaking and how much is involved in fixing, would tractor need split or is it in mcv

cornerpost · May 25, 2016

Best case o ring in MCV. Worst case double split. If TA was just done I would suspect supply tube to TA. That would be good news. DO NOT RUN IT SLIPPING

FarmallKid856 · May 25, 2016

Its not slipping at the moment but we can use it on the low end for now since that looks to be working right and unless the guy was lying the ta was just done before i bought it.

BarnyardEngineering · May 26, 2016

Just because it doesn't stop dead when you throw the TA lever ahead does not mean it's not slipping.

FarmallKid856 · May 26, 2016

Thats why i had said i was going to use it on the low end if i have to until i can get it fixed, i am ordering a kit to replace all the gaskets and orings and i might even do the springs in the mcv this week.

dwag · May 26, 2016

Sounds like TA was damaged when tractor was joined together at bell housing.

larbear · Jun 16, 2016

Why do you say to not run it slipping, and what are the signs of a TA that is slipping. I have recently purchased a 1967 Farmall 706 which runs ok besides the fact that the H-L-N-R lever is quite sloppy. In driving forward as well as in reverse, it moves fine until you turn the wheels sharply one way or the other, then the tractor hesitates in its forward or rearward motion. Increasing engine speed helps, as well as engaging the TA,it will pull through the turn. I guess that the power steering is demanding fluid that isn't going somewhere else. I don't know why that would inhibit the forward motion of the tractor. Any advice would be appreciated.

Farmall 856 lose of TA hydraulic pressure.

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