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Thread: case 580b overhaul and transmission

  1. #1
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    case 580b overhaul and transmission

    i been having problems with transmission. i have pulled the motor out is there anything i need to do before putting engine back in.

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    Super Moderator willie59's Avatar
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    Hello blee62, try to avoid starting duplicate threads of the same problem. It will get disorganised for you. The person on the forum that is familiar with the 580B is Phil in Canada. You need to describe what problems your having with your tranny, give as much detail as you can and maybe Phil can help you out. He's usually here early in the morning and signs off before 9 at night. Try to give as much info as you can for him to noodle through.
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    under load transmission pops out of high or low gear. did not know while engine was out if there was any thing i should do?

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    Super Moderator willie59's Avatar
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    Well, I'm not a B expert, but I think I can safely say the best time to do tranny repairs on one is while the engine is out. Try to think of anything else the tranny is doing. Is yours a power shuttle tranny? Or, is it a gearbox tranny with a fwd and rev gear and uses a clutch. Give all details you can think of for Phil to look over. He'll probably pop up here tomorrow.
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    it is a power shuttle.

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    when i am under load like going a hill i have to put foot on hi low lever to keep in gear.

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    should i put rebuilt engine in with the problems with transmission or look for another backhoe?

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    Super Moderator willie59's Avatar
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    Quote Originally Posted by blee62 View Post
    should i put rebuilt engine in with the problems with transmission or look for another backhoe?
    That would be a question best answered by Phil. Be patient...he'll show up. With you having "580B" in your thread title will catch his eye...trust me.
    A good mechanic isn't expensive, he's priceless!

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  9. #9
    Senior Member Phil's Avatar
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    I have to agree with ATCOEQUIP, best to fix it now by taking the torque tube out. With a high/low lever you must have a direct drive machine with a dual range gearbox housed in the torque tube. That's my best guess. I don't think you are referring to the 4-speed transmission. I've never seen a B model with a high/low range. The lever probably comes out of the side of the torque tube.

    I will look at my CK manual to see if it shows the dual range and mechanical shuttle assembly, and get back to you tonight. Not usually an expensive repair, sometimes a fork, shifter rod, or endplay issue. I've had very little experience on mechanical gearboxes jumping out of gear so please jump in anyone. This type of problem would be similar on farm tractors like the older Case 530 and 430. Phil

  10. #10
    Senior Member Tinkerer's Avatar
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    My Case 680 has a four speed mechanical gearbox. It jumps out of gear also when under a load. If you can feel and see that the shift lever is putting the gearbox all the way into gear and it jumps out under load here is what I found . The gears are worn out. That is what my owners manual said to look for and I verified it by taking off the sheet metal inspection cover on the side of the transmission. The input shaft gear is worn so badly that the teeth look like knife blades. It is on the verge of stripping the teeth right off. I have a full set of new gears and all the bearings but have not been able to park the machine long enough to install them. It does not matter on my 680 weather the engine is in or out of the tractor. The transmission is behind the shuttle assembly and it will be a fairly simple job to remove and reinstall it. I saved about $800.00 by purchasing aftermarket gears and not genuine Case gears.

  11. #11
    Senior Member Phil's Avatar
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    I checked my 580CK manual and yes it does show the dual range option. It is located in the torque tube just behind the mechanical shuttle. I believe if you take the shuttle cover off, you could inspect the shifter forks, detent springs, and shifter rods for problems, as well as the shifting collar and gear teeth. In the book it says the chamfer on the gear teeth and shift collar should not exceed a 1/4"radius. Any excessive end-play or wobbly gears from worn bearings could cause your problem also.

    As Tinkerer said, it could be gears worn out and require many new parts. Phil
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    Best way to split?

    I'm a newbie, so I hope you don't mind me jumping in here - the question is related. I just bought a 74 580B that has a leak similar to the one described in this thread. According to the previous owner, the tractor moved just fine prior to the leak, but while I've got it apart, I'm going to do a complete disassembly of the torque tube, cleaning and checking everything.

    My question is this - as far as replacing the gasket goes, it looks like it's much easier to split at the engine/bellhousing, pulling the engine forward and leaving the hoe and loader frame attached to the rear axle. However, does this make it harder to remove the torque tube after the engine is out of the way? The book says to remove the hoe and go at it from the rear, but that hoe is heavy and I'm not sure I want to do that if I don't have to.

    I'm new to Case - we had JD and MF on the farm I grew up on, but I've split them, so I think I know what I'm getting into. Dry place to work with concrete floor, decent tools, helping hands available - what more could you ask for??

    OK - answering the obvious question - I'm going to use this baby to build an airstrip (lifelong dream), and my wife and kids have called me Papa Goose since I started flying 10 years ago.

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    OK, I goofed - I thought this thread was talking about a leak at the bellhousing - anyway, that's where my machine is leaking and that's why I'm taking it apart.

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    case 580b overhaul and transmission

    Same here.............But my cousin has this tractor. It"s been sitting under
    a pecan tree for years. He"s trying to get it
    started. It has a new battery and fuilds. It turns
    over but just won"t crank. Fuel seems to be getting
    thru..... Does this thing use a glow plug? How does
    it fire? Where is it? All I see is a SENDER UNIT?
    Can anyone help???

  15. #15
    Senior Member Phil's Avatar
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    Papa Goose,
    It's easier to get the torque tube out with the engine already out. Just make sure you put the fuel tank back, if taken out, before you put the engine back in.

    Keep in mind that there are other places that can leak in that area, the starter gasket and the steering valve.

    The leak of course won't affect shuttle operation, as long as oil level is high enough. If you have any shuttle problems, it is a good idea to do some pressure checks before you tear the machine down.

    If you want some advice on what should be replaced in the torque tube, as preventative maintenance, let us know. Phil

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