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480B Posting for a user

YTSupport

YTSupport

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Staff member
I have a person trying to post who can't and I'm unable to figure out his problem. He attempted to post the following. If anyone can specifically answer his question for the 480B, I'd appreciate you responding to this post. He will monitor the post himself. In advance I will say I told him gear oil for manual transmission and either tractor/tranmission hydraulic oil for shuttles or ATF in some cases if the manufactures specifically states it (I had a backhoe that used ATF in the shuttle). I think he'd be better with an answer from someone who has a clue about the 480B. Here is his question:

I have a Case 480B 1977 model. It has the manual shuttle shift. I can not get it to go into Forward or Reverse with the motor running. It grinds when trying to put it in Forward or Reverse. It works fine when the motor is not running. I took the inspection plate off of the side of the transmission and it is dry as a bone inside there. It seems like it should have some gear oil, hydraulic fluid or some other kind of lubricant? If it should have a lubricant in it, what type of lubricant and where do I put it in?
 
a 480B has a mechanical clutch, atf will work in the shuttle/torque tube, TCH was the original recommended fluid, cih Hy-Tran is a bit cheaper to buy today and will also work fine,, it sounds like he has some shuttle gears ground off from being ground into gear,, but again with out being there I cant say 100%,, if the linkage is badly worn it may not be shifting far enough, he could also have other issues deeper inside causing the noise, where he does not know how to diagnose it at this point, I would get under it and remove the drain plugs on the torque tube/shuttle housing and see if you have a large amount of metal coming out,, and do the same at the transmission and rear axle plugs,, you do not have to drain it all out if the fluid looks good just check for metal at all drain plugs this will help to know where the main issues are,, this will get you started on things
cnt
 
He saw the response and asked that I post this reply for him:


Thanks for the reply. I am the one having the problem with the 480B. Should there be a puddle of lubricant in the bottom of the area inside the Inspection Plate? Also, let me share a little more information about the situation of putting it in gear. As you know, there are 3 gear shifts that have to be activated for the backhoe to move:

A. High/Low
B. 1-4 gears
C. Forward/Reverse

I can get any combination of 2 out of 3 above to go into gear. The 3rd one will not go into gear. It grinds. For this reason, I dont feel like there are any broken gears. Could it be low on fluid cause this?
 
I am not sure what you are calling a inspection plate,, there will be oil in all compartments except the clutch bell housing as it has a dry clutch,, if there is oil in the bell housing you have a seal leaking and or possible a bearing has failed, this could cause it to not shift fully into to gear in the FWD/REV shuttle, all oil does is to lube the mechanical gears, as far as not letting it shift no need for oil,, I have seen the shuttle gears ground off from people not letting the gears stop and forcing them in,, there is also syncro's on the shuttle that do wear out and will cause it to grind, if these are ran bad and its shifted in gear by grinding it will do major damage and that may be what you have,, that is why I asked you to pull drain plugs and tell me which plug if any has a large amount of metal pieces, again being low on fluid will not cause it not to go in gear on this model
 
Since he says it will grind in any gear I'm wondering if his clutch is stuck or bad and hanging up. Can he put it in gear and stop with the clutch down? Could be a warped or stuck clutch plate. That is on top of what you said.
 
You can go to the link, below the 480B title click on the hyperlink "No Description" scroll down and view exploded parts view of the dry clutch, 8 speed shuttle gear train and direct/low gear.
Shuttle cover clearly shows a dipstick and if you can't find a fill plug pull the breather and fill there, I don't see what the problem is in the oil questions.

I think Tom & Jon covered the subject about as well as can be for long distant troubleshooting. Personally I would jump on the dry clutch because I know next to nothing about shuttle LOL.

Joe
https://avspare.com/catalog/case/59143/
 
One thing would be to know if the clutch releases at all or not
at all. Can he get it in gear, but just grinds the gears. Or is
there no way to put it in gear at all. Can he start it in gear with
the clutch down?
 
One of the 3 gearshifts grind when trying to put it in gear. It can not be started at all with the 1-4 shifter in gear, regardless of whether the clutch is in or not. I assume because of some safety function. I have tried to attach pictures of the inspection door someone was asking about earlier. I dont know if they will come thru or not. When the tractor is running, you can look in this door with the cover off and it appears that the clutch(?) never stops turning when the clutch is depressed
 
mvphoto62103.jpg


mvphoto62104.jpg


mvphoto62105.jpg


mvphoto62106.jpg
 
sounds like you are looking at the flywheel which always turns with engine running,, only the clutch plate and trans input shaft will stop,, can you shift the shuttle in gear with engine off and then start it and does the 4 speed shifter just grind or can you shift it? we are trying to understand what is wrong,,
 
that looks good as far as I do not see any rust to make me think the clutch is stuck, but it is still possible if the clutch plate wadded in it,, to add to my comment below can you shift the 4 speed in "N" and then shift the shuttle in and then try to put in gear on the 4 speed shifter, if the four speed shifter grinds when trying to shift you may well have a stuck clutch,,
 

I can put the shuttle shift in gear as long as the either the 1-4 gears are in neutral or the high/low is in neutral. If the shuttle shift is in gear, the 1-4 will grind when trying to put it in gear.

Likewise, if the shuttle shift and the 1-4 are in gear, the high/low will grind and not go into gear.

In summary, 2 of the 3 gearshifts will go into gear fine. It is the 3rd gearshift that grinds and will not go into gear.
 
Good Grief--------------The clutch is NOT DISENGAGING!!! Check linkage from clutch to
bellhousing and if all intact, the tractor needs the engine pulled and split at
bellhousing and clutch/throw-out bearing assys. repaired.----------------Loren
 

Is there anything I can do to make it temporarily work so I can move it into my shop to work on it? Is it possible to bypass the safety system and start it while it is in gear. It currently has to be out of gear (1-4) for it to start.
 
use the Lowest gear you can and make sure everyone is out of the way and you can hook the two wires on the safety start on the 4 speed cover together just start it but I Highly advise to put it back so it works like it should afterwards, again SAFETY is the key work here and be ready to shut off the engine at any second to stop it,,
 
You may be able to free the clutch if it's just stuck. Jack up
one rear wheel, put it in high gear and block or have someone
hold the clutch so it's in the released position. Then rock the
wheel that's up back and forth. Sometimes that will break a
clutch free that's just stuck from sitting.
 
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