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D3B Steering Clutch Question


 
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Hopeless
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PostPosted: Tue May 01, 2007 1:52 pm    Post subject: D3B Steering Clutch Question Reply to specific post Reply with quote

I have a D3B CAT dozer (27y...)Right steering clutch stopped working. Took the clutch out and found disks need replacing..width of clutch pack was OUT of spec according to manual. So took it apart, put in new steel and fiber disks and put it back together.

While I was there took the LEFT clutch pack out and measured the depth. Right in the middle of the spec. Fiber disks had all there teeth so DID NOT touch.

However found both brake band worn badly. So replaced.

After putting clutches back in I only put enough "stuff" together to do a dry run. Make sure the sprockets move, check for hydraulic leaks etc.

Well, what I found is the RIGHT side clutch works great. This is the one that I totally redid. When you activate the hydraulic steering valve, the piston pushes on the yoke and with only the very slightest pull on the brake the sprocket stops dead.

HOWEVER, what happens on the LEFT side is when you activate the hydraulic steering valve the piston pushes the yoke HOWEVER no matter how hard I could apply the brake the sprocket kept turning.

Any IDEAS?????

All help is appreciated

 

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Bob/Ont
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PostPosted: Tue May 01, 2007 4:00 pm    Post subject: Re: D3B Steering Clutch Question Reply to specific post Reply with quote

Is it pushing the yoke untill it hits the stop bolt? You may have a bearing on the end of the steering valve that is worn out. This will limit the release pressure you get and also the yoke movement. If one valve has a bad bearing do both valves now.
Later Bob

 
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Hopeless
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PostPosted: Tue May 01, 2007 4:07 pm    Post subject: Re: D3B Steering Clutch Question Reply to specific post Reply with quote

Bob:

Thanks for the reply. Both yokes are being pushed righ up to the stop points (hitting the clutch case). Also, just redid both valves with new bearings, gaskets, springs etc.

My "fear" is that I'm going to have to remove the LEFT clutch again and take that one apart. Was just wondering if there was something that can be done before going thru that again!

Seems like LEFT clutch just won't disengage.

Thanks

 

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Hopeless
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PostPosted: Tue May 01, 2007 4:09 pm    Post subject: Re: D3B Steering Clutch Question Reply to specific post Reply with quote

Sorry put response in wrong place. See above.

 
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Bob/Ont
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PostPosted: Wed May 02, 2007 5:41 am    Post subject: Re: D3B Steering Clutch Question Reply to specific post Reply with quote

Dry clutches do stick together some times, usually after sitting for a time. If your valves are good and the yokes move fully that must be the problem. May aswell pull it and have things good on both sides.
Later Bob

 
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Hopeless
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PostPosted: Wed May 02, 2007 6:50 am    Post subject: Re: D3B Steering Clutch Question Reply to specific post Reply with quote

Bob:

THANKS!!! You are right. Do it right or don't do it at all.

Will pull it and undo pack and hopefully that will "unstick" it.

Thanks again!

 

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