Update-PTO/Clutch Engagement: Kubota Review  -- Kubota Tractors Discussion Forum and Review Update-PTO/Clutch Engagement: Kubota Review -- Kubota Tractors Discussion Forum

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 05-17-2005, 21:10 Post: 111204
beagle

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 Update-PTO/Clutch Engagement

Thanks Murf for your help yesterday. Tried your suggestions, but the problem doesn't seem that straightforward - to me. With the clutch pedal depressed (disengaged) and press the hydro pedal slightly, the tractor will creep. If I depress the clutch and fully depress the hydro pedal, the tractor does NOT move, and the slight rotation at the PTO shaft will stop, allowing me to engage the pto without grinding. The load of the fully depressed hydro is enough to break the clutch hold. It would seem that if the clutch was frozen, depressing the hydro pedal fully would have the tractor moving. It feels like there is some slight engagement of the clutch with the pedal depressed, enough for slight tractor creep and pto rotation. I have taken all the free play I can out of the clutch pedal, as it is set now, when the pedal is fully depressed, the control rod touches the engine block, even shows signs of rubbing against it.

Anyone had this problem before. As I said yesterday, the tractor was used all winter for snow plowing. It didn't sit for more than two weeks without being used. I never noticed the problem until I rigged up the RFM last week to mow lawn and had trouble engaing the PTO. Murf, is this different than what you understood from my last post? This has me baffled. Looking for any ideas before I crack the tractor in half to have a peek at the pressure plate. I have too much worked lined up for this to shut me down now.

Thanks for any help.






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 05-18-2005, 07:56 Post: 111216
Murf

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 Update-PTO/Clutch Engagement

Beagle, no in fact it's sounding more & more like what I thought it might be.

The rust is causing enough friction to cause everything to drag just slightly.

Winter use is actually harder on a machine than parking it. When you run the machine it warms up, then you run it around and git covered in snow & slush, then you park it and allow everything to get covered in condensation. The result is a lot of rust on bare metal, like the clutch faces.

Now that you have it freeing up, if only slightly, do just what you did before, put the machine in forward range, push the clutch all the way down and push the hydro pedal full forward. After a few moments of this start to slowly let the clutch out to completely clean the plate and both mating surfaces. It shouldn't take long to clean it up.

As you said, the alternative is to split it and clean it manually.

Best of luck.






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 05-18-2005, 08:03 Post: 111217
beagle

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 Update-PTO/Clutch Engagement

Thanks Murf, I'll give it a try today. I did check the clutch housing drain, bone dry.

If what you descibed is what happened, it doesn't seem like blocking the clutch would have made any difference for this problem. The faces would have rusted faster disengaged since air and condensation would have been more available than engaged.

I'll let you know. Thanks again.






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 05-18-2005, 08:07 Post: 111219
Murf

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 Update-PTO/Clutch Engagement

You are right, they will, and do, rust faster when blocked open. However, they do not rust TOGETHER into one piece.

As soon as you move the machine and actuate the clutch a few times the rust quickly disappears, just the same thing happens with vehicle brakes also.

Best of luck.






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 05-19-2005, 06:59 Post: 111255
beagle

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 Update-PTO/Clutch Engagement

Played with it yesterday Murf. I don't think it was ever completely siezed together, but don't know for sure either. I have messed around with it some, but there still seems to be some engagement with the clutch pedal full down. Any harm in using it this way a while and see if it loosens up? Any damage to the pressure plate by continuing to use it, or anything else?






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 05-19-2005, 07:57 Post: 111258
Murf

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 Update-PTO/Clutch Engagement

The only real risk is that of clashing gears on engagement/disengagement.

The input shaft may have some surface rust on it, and/or accumulated rust that came off the plate stuck in the grease causing the plate to not slide freely anymore. Continued usage should help free things up. Try to use the clutch itself as much as possible for a while and see if it continues to improve.

Try letting the engine slow to an absolute idle without touching the clutch, then engage the clutch, wait a moment, then try to engage the PTO very slowly. This will limit the speed of the TX shafts spinning to the absolute slowest speed possible.

Best of luck.






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 05-19-2005, 08:08 Post: 111259
beagle

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 Update-PTO/Clutch Engagement

Thanks, I've developed a good procedure for smooth pto engagement. As long as I press the hydro pedal and the clutch at the same time, there is enough drag to diengage the clutch and I can change everthing smoothly. The coordination of foot movement takes a little thought.

I'm hoping a couple more hours of use will loosen things up. Is there anything I can fog the clutch housing with from the drain that would help, or am I asking for more trouble?

Thanks






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 05-19-2005, 08:22 Post: 111261
Murf

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 Update-PTO/Clutch Engagement

Other than compressed air there's nothing you can put in there that won't cause real problems.

The last thing you want on frction linings is anything that could act as a lubricant.

I take there is no access port, just a drain plug ?

Best of luck.






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 05-19-2005, 08:31 Post: 111264
beagle

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 Update-PTO/Clutch Engagement

Yes, there is an access port. I will need to do some searching to find out what kind of digging is necessary to get at it. It's on the side of the housing. Might be just a matter of the floor pan. I'll take a look at it.

Thanks






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 05-20-2005, 08:05 Post: 111283
beagle

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 Update-PTO/Clutch Engagement

Well, it's going to the dealer next week for a scheduled tear down. The CFO got involved yesterday and she's concerned about the safety issue of fully depressisng the clutch and the hydrostat pedal at the same time. Makes too much sense.

There are a lot of 7800 owners on this board, so I'll be sure to let everyone know what comes out of this. I've had garden tractors I that worked harder than I worked this 7800 with no problems. This machine has 115 hours of "babying" on it, so finding out exactly what is going on should be interesting. Stay tuned.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

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AnnBrush 1 | Art White 2 | beagle 11 | jarndt 2 | mc2crazy 1 | Murf 4 |




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