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Tractor Talk Discussion Forum

steering/clutch

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1486

05-01-2005 15:05:51




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help fast I have 1486 . the hydraulics and pto work fine.The problem is the steering will lock up as if it has lost it's hydraulics and at the same time the clutch will not really seem to slip but will actually act like it is disengaging. then pretty soon it will take offgo likre normal. and when it is driving normal you can ride the brakes and it will not slip the clutch so I don't think it is actually the clutch but could it be the hydraulic pump thatsupplies pressure to the clutch, and would this pump also power the steering to the tractor. Only tractor I have to work with so any immediate response would be greatly appreciated thank you

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1486

05-01-2005 19:01:16




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 Re: steering/clutch in reply to 1486, 05-01-2005 15:05:51  
Tractor vet, sounds like you have alot of experience with these kind of probs. If it is only acting up now and then and I test it while it is acting normal will I get a normal pressure reading or will it still read low.If it is sucking air between the range and speed trans do I have to pull top shifting covers off to get to that or where is the pickup tube r o ring. and do you know which valve would control this> I have followed the tube from the bottom of the Mcv pump housing and it goes to the other side of the tractor. to a housing that is next to the hydraulic control valves.Can you buy rebuilt MCV pumps.(I'M SURE they costly)or how hard are they to rebuild. Dad said he did a pump on a 560 one time and it wasn't to bad

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the tractor vet

05-01-2005 20:23:38




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 Re: steering/clutch in reply to 1486, 05-01-2005 19:01:16  
Well if it is the big O/Ring then you must split the tractor between the range and speed trans. . the pickup tube is in the rearend housing and i have never tryed to remove it thru the back and i am not sayen that it can not be done if ya got real long arms. To make the test on the MCV ya need a hdy.fitting that will go into the bottom plug and a gauge that will read atleast 600 lbs. and to do the test wright ya need a special test spool and fitting to go into the dump valve and a second gauge and then you must compair both readings and to flow test then ya need a Flow rater and the special fittings to go inplace of the cooler lines . As far a rebuilding the MCV it is not rocket sicience just a clean work bench and a vice and a book and being careful of the spring pressure under the cap plugs and a good set of eyes to look for nicks and scratches and how to deal with them and a new gskt. set and spring kit and knowen just how much to cut off the pressure reg. spring some times ya got to cut them and sometimes you have to stretch them . A spring kit can be bought from a Hy Capacity dealer along with the gskt set. and you can get the special test tool from them along with the special scoket for the control valve. But by the time you by gauges and special tools and ya still do not have a flowrater and i don't think ya want to lay out 3500-7000 bucks for one of them you would be better off having a dealer fix it . If you were in my back yard i could do all of it for not that much unless ya have to start pullen the top cove off the back end or splitten .

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the tractor vet

05-01-2005 20:27:16




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 Re: steering/clutch in reply to the tractor vet, 05-01-2005 20:23:38  
One thing no body asked is this and early 1486 with the open center hdy. system or a later one with the PFC systerm ???? IF it has the PFC system then it is another ball game. And i don't have all the stuff for that one as i need the second part for my flowrater to even figure out what is going on there .



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Allan in NE

05-01-2005 20:34:08




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 Re: steering/clutch in reply to the tractor vet, 05-01-2005 20:27:16  
Silly me,

But, I still think we ought to maybe look at that hydraulic filter just before we split the tractor and install a new set of bull gears and a new crank. :>)

Allan



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the tractor vet

05-01-2005 21:09:39




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 Re: steering/clutch in reply to Allan in NE, 05-01-2005 20:34:08  
Well ya can pull the filter and look but thqat is not going to fix his problem since the oil that is going to the MCV has already been filtered . He wanted to know what could cause his problem and i told him , but like i said is it a early or late model . It could be something simple or it could be major. Remember i have been fixen I H tractors for a number of years and i have spent a lot of money for the tools that only the dealers have and i am still looking for a couple more that i do not have . There are time when one is better off to have someone that has the special tools and KNOLAGE to check it out and fix it like you do . I kept many of the farmer around here going for a lot of years and i never gouged them or cheeted them and fixed it wright the first time . And I DO KNOW FARMALL TRACTORS . I have had every nut and bolt out of the Letter seires thru the 86 seires and have seen a lot in the 19 years of doing it for a living till the local economy went down the tubes and if nobody has money to fix then i had no money to pay bills . I have taken pure junk and made them into tractors that will work eveyday and have had several tractors on the cover of Fastline and red power roundup video and in the 94 red power show there were 9 tractors that we had done up for people . So now that ya got my dander up let me know when you think you can out wrench me or know more about fixen a farmall .

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Allan in NE

05-02-2005 04:02:31




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 Re: steering/clutch in reply to the tractor vet, 05-01-2005 21:09:39  
Gee Whiz Doc,

I was jokin' with ya. I think maybe you're tired or somptin'. :>) (See the little smiley face?)

Allan



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the tractor vet

05-01-2005 18:24:12




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 Re: steering/clutch in reply to 1486, 05-01-2005 15:05:51  
There can be several things comming into play here and since you have filled the trans with oil then there could be a air leak in the pickup tube or the O / ring between the speed transmission and range transmission may be sucking air but before i would start twisten wrenches i would check pressure and do a flow test on it . I my be just a sticking flow control valve or weak springs in the MCV or you could just have some dirt in the steering orfice. Is the TELTALE LITE comming on ?? this will show a pressure drop in the MCV.It may be a blowen O/Ring in the mcv or a blowen gskt. There are alot of maybe's to this one The pressure should be around 250 on the MCV when i redo one i like to set them at around 260 to 285.

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grazer

05-01-2005 16:42:17




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 Re: steering/clutch in reply to 1486, 05-01-2005 15:05:51  
Your mcv pump is weak. It is located on the left hand side. just below the clutch.It will have to be replaced.



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Allan in NE

05-01-2005 15:27:44




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 Re: steering/clutch in reply to 1486, 05-01-2005 15:05:51  
Yes,

Power steering has priority on that front pump, then the brakes and finally the T/A shifting and trans lube.

Remote hydraulics and the hitch are handled separately by the rear pump back under the axle.

Thirdly, the PTO is completely independent with it's own pump.

Check your fluid level. If the operation is coming and going, it might be starving. Are you on hilly terrain? Over-fill the rascal by 5 gallons.

Allan

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1486

05-01-2005 15:37:23




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 Re: steering/clutch in reply to Allan in NE, 05-01-2005 15:27:44  
Allan thanks for responding to my question,Before this happened it was on the low reading on the hyd dipstick so we filled it up and thought maybe we were getting air in it so we turned the wheels to the left and to the right sharply and it worked for awhile that way. so we thought if it was air we may have forced it out but now with it acting up again we ruled that out . Are you saying to over fill it 5 gallons? I am not on rough or uneven terrain but will be when I move to the next tract ground. would a weak TA cause any of this and if so can you lock it out anyway. hen you refer to the front pump are do you mean the one on the left side behind the lower fuel tank.

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Allan in NE

05-01-2005 16:41:13




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 Re: steering/clutch in reply to 1486, 05-01-2005 15:37:23  
No,

Nothing wrong with your T/A. You just don't have oil enough to run it.

After you purged the air, did you check the oil level again? The level would have dropped. IH said to run 5 gallons extra if you were gonna be on hillsides.

Yes, the pump is behind this plate/valve arrangement (picture is of my 9, but the two should be similiar), however if the problem comes and goes, I don't think it is the pump. When was the last time you changed that hydraulic filter?

Allan

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David A. Hodson

05-01-2005 19:06:19




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 Re: steering/clutch in reply to Allan in NE, 05-01-2005 16:41:13  
Allan I'm surprised at you theres no grease on them there zerks and none on them pivots. Just thought I'd tease you a little David.



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Harley

05-01-2005 19:23:55




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 Re: steering/clutch in reply to David A. Hodson , 05-01-2005 19:06:19  
Silly David. Allan belongs to that new High Plains Church of the Immaculate Machinery. He now has to use that new wasteproof grease gun that don't leave a last little smear on the zerk. Life in the fast lane, Harley



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David A. Hodson

05-01-2005 19:48:10




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 Re: steering/clutch in reply to Harley, 05-01-2005 19:23:55  
Harley, I didn't even think of that but you know I think you might just be onto something David



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Allan in NE

05-01-2005 20:07:42




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 Re: steering/clutch in reply to David A. Hodson, 05-01-2005 19:48:10  
Fast Lane?

At my age, I can't even remember where the derned highway is! :>(

Allan



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David A. Hodson

05-01-2005 20:24:43




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 Re: steering/clutch in reply to Allan in NE, 05-01-2005 20:07:42  
Allan my grandfather was 94 going on 95 when he paston on and he didn't slow down until maby the last 6 months of his life (funny thing he could out do dad and he's only now 73) he only new how to work hard all his life and didn't want to slow down so hang inthere old (and I use that term lightly) buddy. LOL David



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