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Farmall & IHC Tractors Discussion Forum
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806 Hydraulics, Kind OF Scared That It Is Major!

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Harlen Larson

08-09-2006 18:24:33




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OK, I have never had hydraulic trouble with this tractor with the exception of a couple of small leaks. I went out last night to brush out some new ATV trails and noticed for the first time that my power steering was a little jerky. I was only out for about 10 minutes. Then all of a sudden no hydraulics at all,steering, brakes,etc.. Realized this going down hill of all things. Not a good thing to have happen on one of these tractors. I got to the bottom really fast. So I lost my TA pressure and everything. I shut it down at the bottom of the hill and checked the fluid. Hard to read getting just about dark but didn't look to be down very far. I walked back to the shed, came back with fluid and put in about a gallon. I then had hydraulics and drove it back but the steering was still jerky and the brakes are slow at activating. Tonight home from work and I put in a little more fluid and went out to the field to drive around and play with it. Steering didn't get better and everything hydraulic seems louder than normal. I think the fast hitch is going up slower to. I put a gauge on one of the remotes and it shows 2000lbs when I hit the lever. I don't know if this answers any questions or not because I don't know what it was before. HELP!!

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Harlen Larson

08-10-2006 17:35:53




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 Re: 806 Hydraulics, Kind OF Scared That It Is Majo in reply to Harlen Larson, 08-09-2006 18:24:33  
I did not know that about the brakes. I thought without the engine running you had nothing, makes more sense that way though. Where is the best place to buy a reman mcv? If that is all it needs I guess it is not so bad. Still too much money for me right now though,(I'm not a real farmer I just have the bug from farming for other people in the past). Theres nothing better than coming home from work and listening to that diesel and being out in the open air. I have always loved these 806's. I don't have any experience with working on them though and I know they are more expensive to repair than what I have previously owned, a 450, Super H(should have never sold it), and some small allis's.
Is there any way I can test to make sure it is the mcv? I guess I never said it before but thanks guys for all the help. I am not on here very much but I check in almost every night to see whats being talked about. The knowledge on here amazes me. Where would the farming world be without the Tractor Vet?

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Aces

08-10-2006 09:29:45




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 Re: 806 Hydraulics, Kind OF Scared That It Is Majo in reply to Harlen Larson, 08-09-2006 18:24:33  
Harlen One thing I never see said here even from the tractor vet. You should have good brakes without hydraulics if the brakes are maintained in good shade. The test is simple, with engine off push right brake dedal as far as it will go then push the left pedal a little if the right move farther right brake is good then push the left pedal as far as it will go then push the right a little if the left moves farther the left is Ok. I would do the test with the left brake first as well.The last part of the test stop the tractor on a safe slop stop engine, let tractor roll a little and apply the brakes you should be able to slid the wheels if not the brakes need rebuit. This is true from 706 through 1566 and I belive 86"s.
Any one in the hills should check this from time to time for manual brakes. This very good safty check.

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the tractor vet

08-11-2006 15:41:37




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 Re: 806 Hydraulics, Kind OF Scared That It Is Majo in reply to Aces, 08-10-2006 09:29:45  
Ah this may be true but only if the check valve is working good and as the years creep up on them the check valves leak a bit or sometimes don't hold at all and when the engine goes down so does the brakes . Also i have seen a lot of the adjusters stick or the return spring in the brake drum broken or so pluged up with rust brake dust or goo that things just don't work like they did new. Just this spring i had to get into the left brake on the 806 as either Dust or Eugene stomped down hard and sheered the splines off the disks. and found three broken return spring in her and one stuck adjuster. Now on his tractor i would lay a twenty dollar bill on the fact that the Quad O/Ring behind the filter retainer is missing and he sucked some dirt into the MCV and have a flow divider sticking or the pressure reg sticking . I know that on my 806 that when we are fillen the bunker and i stick the nose of my 806 down over the ramp that it will suck air if i don't run it 5 gallon over full and the PTo stops also from being to steep .

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Hoss W

08-10-2006 07:21:10




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 Re: 806 Hydraulics, Kind OF Scared That It Is Majo in reply to Harlen Larson, 08-09-2006 18:24:33  
Sounds like your MCV pump is taking a dive. 45 minute job, $320 for a reman, on the left side of the tractor by the step. Dad's did the same thing this summer. Steering brakes and TA are all operated by this pump.

Good Luck!

Hoss



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Allan In NE

08-10-2006 08:58:10




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 Re: 806 Hydraulics, Kind OF Scared That It Is Majo in reply to Hoss W, 08-10-2006 07:21:10  
Well, heck yes!

1 in 1,000 will be something other than a pump. Put a front pump in 'er and be done with it.

Allan



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Harlen Larson

08-09-2006 20:27:03




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 Re: 806 Hydraulics, Kind OF Scared That It Is Majo in reply to Harlen Larson, 08-09-2006 18:24:33  
OK I'll change fluid and filter again, (I did it this spring already). But how do you clear dirt out of the mcv?



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the tractor vet

08-09-2006 19:17:02




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 Re: 806 Hydraulics, Kind OF Scared That It Is Majo in reply to Harlen Larson, 08-09-2006 18:24:33  
Well at least your hitch pump is in good shape , of corse if it has a 2250 releif in it then it is not so good . First change the hyd. filter . Then with the tractor on level ground then check the hyd. fluid level and fill to the line . Now your steering, brakes and T/A are on there owen pump behind the MCV on the left side infront of the step . Now she may have sucked a pice of dirt into the MCv if the Square O/Ring behind the plate that the hyd filter sets in is missing and it would not be the first 06-86 seires tractor that it was missing from .Now if you are working a 06-86 seires on steep hills when ya stick the nose down the hill all the hyd. oil runs foward and exposes the pickup tube and they will suck air and away ya go so it is wise if operating one of these seires tractors in not so flat ground ya may want to add about and extra 5 gallon to the transmission as this will help from sucking air . I think that the engeneers that desigened them never set foot in our part of the country i have had that happen to me one tomany times .

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