What the heck? Lost loader hyds

old · Aug 8, 2017

So I have been repairing my driveway form the Saturday flood we had. My Ford 841S has a heavy duty loader on it brand unknown. So I had a full bucket of grave and has set the loader down to push the gravel forward before I dumped that bucket full. So I pull on the lift control handle and nothing. I then tried the bucket control and nothing. No broken hoses or anything. So checked Crank shaft dive which I have had go bad and it is working just fine. Pop the top off the tank so make sure I had fluid and also look for movement and saw no movement. So I shut it off and go get chain and com-a-long to lift the loader so I can back it away and trouble shoot it. Come back and figure I better fire it back up since I had not shut the gas off. Fired it up and figured I'll pull one of the controls and the loader worked just fine again. It was new time so I parked it for the night. So what the heck happened that I lost hyds and then they came back
THANKS

marloweg · Aug 8, 2017

bet your pump drive shaft spline is gone. when you lift a heavy load bet it will stop

Janicholson · Aug 8, 2017

Shaft could be it, or the relief valve got stuck open with a tiny piece of crud. Good to go. Jim

old · Aug 8, 2017

I replaced the drive shaft not all that long ago. Plus i tied the one control back and look to make sure the pump was spinning just in case

old · Aug 8, 2017

Drive shaft and hub where replaced less then a year ago. Plus i tired one of the controls back and step off to look and the pump was spinning just like normal. I know about the drive shaft problems all to well and have replace them many times over the year of owning this For and the 8N with back hoe both have the same pump set ups

JD Seller · Aug 8, 2017

I will second a stuck relief valve. I have had that happen before.

NCWayne · Aug 8, 2017

Like others have said, I'd go with a stuck relief.

Had a customer with an excavator doing something similar a few years back. If he 'shocked' the system, the port relief (for the lift cylinders only) would pop, and stay open until all the load came off it. Once unloaded, it would reset and it would lift the world. You could even bottom the cylinders and make the main relief open, but until you were lifting something, and the port relief sensed another shock load, everything would work just fine.

sms · Aug 9, 2017

Years ago I had a bulldozer that would do that. It had a nylon check ball to protect the system if it was shocked. That check ball was oval from years of use/abuse and would jamb in the seat. I had to remove to tap the ball out of the seat. Got a new ball ASAP.

Butch(OH) · Aug 9, 2017

Old, my Case W11B did that there times. First time I checked pump drive, found nothing and when I got done it began working. Second time I got into the relief valve (which was a major pain to get at) found nothing and it again started working on its own. Third time I heard a slight hissing noise and found there was a vacuum in the oil tank, found that the breather was plugged with ? years of dirt, cleaned it and hasn't done it since. Only thing I can figure is it pulled a vacuum on the pump, then air locked??

dahlin · Aug 9, 2017

Old just a wild guess but could the suction hose lining come loose and folded over and plugged the suction side of your pump. Randy

Dblair · Aug 9, 2017

I'll go with you

old · Aug 9, 2017

Well when I pulled the cap off the tank which is also the breather if it was that it should have started working again but it did not till I shut it off and let ti sit 5 minutes or so

old · Aug 9, 2017

As I said shaft and hub less then a year old and I tied the control handle back and the pump was still spinning so cannot be that

Butch(OH) · Aug 9, 2017

Ooops, guess I missed that part.

Cory Schmidt · Aug 9, 2017

is there a screen on the pump intake...just there this last weekend

Our 2440 deere hydraulics quit like that, got it to the shop....shut it down to clean an area in the shop, started it again... hydraulics work. Ok this thing drinks fluid like a booze hound, lets actually check the level(instead of just dump a few more gallons in). Couldn't recall if the rock shaft had to be up or down, get the manual....whats this intake suction screen thingy it mentions. Pulled the plugs for the screen, no oil flowing out(its way at the bottom of the not drained trans, why no oil), screen packed tight, doesn't move. Since it goes right through the place it is in we got one end with a punch and hammered it out. The screen had a 1/4 of "hair" on it after we got it out. New screen back to work, but still acts like its starved for fluid....like it was before it all of sudden died. It will work this way, till find more time to tear more apart.

tomstractorsandtoys · Aug 9, 2017

That hair you found is more than likely your brakes and maybe your hi low clutches as well if equipped. Get ready to spend major money and time fixing and cleaning your hyd system.

Tom

Cory Schmidt · Aug 9, 2017

I used Hair as a general term to describe what it was like, it was a mix of everything dirt, grass, fuzz, possible actual hair...The Hi-lo shifter is loose(just pull a little its in your hand), and as much oil as we dump in, anything and everything might be in there.

I expect it to be costly, with that and the host of other problems we have with that green pile(PTO, diff lock, don't charge.....). We only bought it because we needed a loader NOW after a rod busted the block out of the previous loader tractor.

What the heck? Lost loader hyds

old

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marloweg

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Janicholson

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old

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old

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JD Seller

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NCWayne

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sms

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Butch(OH)

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dahlin

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Dblair

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old

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old

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Butch(OH)

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Cory Schmidt

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tomstractorsandtoys

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Cory Schmidt

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