Hello to all it`s Terry t yosemite tractor 306 dozer grinding feal |

This topic has 13 replies, 2 voices, and was last updated 9 years, 10 months ago by Bob Rooks.

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- January 15, 2015 at 1:09 pm #30983
  Yosemitetractor
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  I just got in a 306 dozer 2007 year with about 200hrs on it. When you put any load on it there`s a grinding sound and a shutter forward movement stops. You use the forward reverse leaver it hooks up for a little bit then back to grinding and shuttering. It was really fun to get it on the trailer to get it here. I have the engine out and the all the hyd clutch out and don`t see any stripped shaves or burned clutch disks. If the hyd pressure was low does the clutch slip smooth or a shutting? Now I`m thinking ring and pinion. What do you guys think?
- January 16, 2015 at 12:25 am #37439
  Bob Rooks
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  What was the clutch hydraulic pressure before you disassembled it?
  
  What does the clutch input shaft spline look like?
  
  Do you know the operating principles of the hydraulic shuttle clutch? Like what causes it to engage and disengage?
  
  There is a remote possibility that the issue lies within the bevel gear.
  
  What type of oil has been used in the bevel gear compartment and in the shuttle clutch?
  
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- January 16, 2015 at 2:37 pm #37440
  Yosemitetractor
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  I didn`t check the hyd pressure before I pulled it a part.
  
  The input spline look fine no sigh of and distorison.
  
  The piston gets pushed by hyd pressure in to the clutch pack either forward or backwards and those parts look fine.
  
  The oil that came out kinda looks like AW46 but the customer has put other kinds of oil in there as he had leaks.
  
  I`m going to mark all the hoses today so I can look in to the rear end and see what I can find back there.
- January 17, 2015 at 10:34 pm #37444
  Bob Rooks
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  The hydraulic pressure RELEASES the clutch discs and plates, the springs are what ENGAGE the clutch pack. Just like a Cat.
  
  AW46 is the wrong oil to use in the shuttle clutch, but can get by for a short while. Do not use UTF, ATF, or THF oils. Recommended oil is ISO AW 220 MACHINE OIL, or Caterpillar TO-4. These oils have an AGMA rating of 5.
  
  The transmission and bevel gear case should be using 75W-90 or 85W-90 gear oil. Anything less and you're asking for trouble. Final drives should have 90W-140 gear oil.
  
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- January 19, 2015 at 3:32 pm #37450
  Yosemitetractor
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  I do see wear on the 6 spline main shaft all ready where it slides in to the adaptor on the flywheel. Any idea if the new parts are a harder shaft? This dozer only has 200 hres on it.
  
  Thanks
  
  Terry
- January 19, 2015 at 5:11 pm #37451
  Bob Rooks
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  Can you post a picture of it please? Don't know if a new shaft would be case hardened or not, but that could be done.
  
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- January 19, 2015 at 5:57 pm #37452
  Yosemitetractor
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  Pic
- January 19, 2015 at 9:31 pm #37453
  Bob Rooks
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  It's pretty difficult for first time users to post a pic, but easy as pie once you've done it. Click on the little tree in the formatting bar directly above your text, then click on the image to the right of the “Image URL” text box. Then search your computer for the picture file.
  
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- January 19, 2015 at 9:33 pm #37454
  Bob Rooks
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  If my suggestions don't work, these will:
  
  http://www.ctoa.net/category/u…..-our-site/
  
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- January 21, 2015 at 11:00 am #37457
  Yosemitetractor
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  Still cant post a pic but I did put a pick in the photo album called dozer
- January 21, 2015 at 12:32 pm #37459
  Bob Rooks
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  Sorry, I didn't see it. But even if I did, I couldn't open it anyway. Something is wrong with this site again.
  
  Try posting the pic here:
  
  https://www.facebook.com/yuchaidozer?ref=bookmarks
  
  Account deleted.
- January 25, 2015 at 2:34 am #37466
  Bob Rooks
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  Hi Terry, did you read my response on the FB page?
  
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- February 14, 2015 at 9:53 am #37498
  Yosemitetractor
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  Where do I get the splined bushing to fit the drive plate
  
  on the flywheel?
- February 15, 2015 at 12:32 am #37499
  Bob Rooks
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  Did you try Circle-G or Yuchai directly? Might be able to have a machine shop make a few.
  
  Do you have a part number?
  
  Not sure what splined bushing you are referring to.
  
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