Fiat/Hesston 605C Steering Clutch freed up, now no go

Paul007 · Jul 31, 2015

Today I was pushing dirt uphill and my right steering clutch, which has been stuck (engaged) since I got my dozer a year ago, finally freed up (had the lever tied back)! The bad news is now it won't engage. I took the inspection cover off and I what I can see of the clutch is spinning, but no drive to the track. Hmm...any ideas?

TomA in CA · Jul 31, 2015

Do you have free travel. Often when a steering clutch is
stuck all adjustment is taken up in an attempt to get it to
release.It would need to be re adjusted after it frees up.

Paul007 · Jul 31, 2015

Hi Tom,

The lever (that I had tied back), has an adjustable ramp that bears upon the lever shown in the diagram. Today I loosened that adjuster so there is a large gap. Then I tried to move the lever shown in the diagram with a pry bar, didn't seem to move much.

The inspection cover hole shows me roughly where the green arrow goes below. I can seen the pressure plate (blue) and I think the clutch drum (red). I didn't get a great look but if both of those are turning it seems to me the clutch is holding and something else must be wrong. I will get a better look on Sunday.

I'm hoping maybe just the pressure plate is not moving in enough or something. One other possibility is the soaking in diesel fuel I gave it. There is still some I can see puddled in there and the brake is barely doing anything. Maybe that needs to dry up but I would think I would still feel some pull, I'm getting nothing.

Thanks for replying.

Paul

AJ. · Aug 1, 2015

What can you see spinning,the pressure plate or the drum,if the drum is spinning and the track not moving the drive between the drum and sprocket has an issue and its probably in the final drive.
AJ

Paul007 · Aug 1, 2015

I know the pressure plate is turning, might take a light and mirror but pretty sure I'll be able to see the drum. Just thought of something, if the brake works (and it seems to, albeit weak), that means the drum is connected to the track, right?

AJ. · Aug 1, 2015

Yes the drum is connected to the track through the final drive,the drive comes out from the bevel gear and into a hub that carries the clutch discs,there are two sets of discs in each clutch pack,one set has internal teeth in mesh with the hub while the other has external teeth to mesh with the drum,the discs are spring loaded to be engaged till the lever is pulled,if the brake is holding on that side it suggests that drive is going through to the track,disengage the other clutch and put it in drive while you watch the drum,if the drum turns and the machine does not move something is broke between the drum and the sprocket,you say that you had the clutch tied disengaged for it to break free,check and make sure that the release yoke is returning to the same place as the other one.
AJ

Paul007 · Aug 5, 2015

YIPPY YAHOO AND HOT DIGGITY DOG!!! I'm driving and steering, both directions! So after the right clutch finally broke loose, I untied the lever only to find it now would not drive. Upon close inspection (almost impossible to see) through the inspection cover I discerned that, though the throwout fork moved with the hand lever, the throwout bearing was not moving back and forth (I looked at the other side and could see the movement). So with an hours worth of heat, oil, banging and levering it suddenly snapped loose. Another hour of working it back and forth with levers and it became loose enough to work on it's own. Adjusted the hand lever, fired it up and all good!

A lesson perhaps: I had been thinking all along that the clutch plates were frozen, not until I was able to see the throw out bearing not moving did I realize the problem. Sure glad I didn't start pulling it apart.

Thanks for all the advice.

Fiat/Hesston 605C Steering Clutch freed up, now no go

Paul007

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AJ.

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AJ.

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