606 International

I m working on a 606 IH, that the gear shift moves freely and goes into all the gears, but as soon as you try and let the clutch out it bogs down and dies. Acts like there s a bearing or something bound in the transmission.
Any advice would be appreciated.

check to make sure you are not stuck in 2 gears at the same time. remove the shifter and have a look. the 3 shifting rails should all be
lined , if not line them up with a bar and put shifter back. the end of shifter gets worn and care must be taken to shift slower.

(quoted from post at 09:09:36 10/18/22) check to make sure you are not stuck in 2 gears at the same time. remove the shifter and have a look. the 3 shifting rails should all be
lined , if not line them up with a bar and put shifter back. the end of shifter gets worn and care must be taken to shift slower.

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I pulled the shifter, and it s a little worn but everything is lined up.

whats the story? was this a working tractor?

Yes it was.
My customer brought it to me thinking it got stuck in between two gears. I m positive that s not the issue.
You can put it in neutral and roll it. Then put it in gear and it won t roll.
You can start the tractor in neutral with the clutch in, as soon as you start to let out on the clutch the rpm s drop and it kills the engine.

If it rolls in neutral, but still stalls the engine in neutral, it is NOT in the transmission. Whatever the problem is, is between the transmission and the engine. That would be the main clutch or the TA.

There are inspection covers above the TA clutch and planetary housings but you may have to pull the steering box to get at them.

I am thinking input shaft (front) bearing has seized. Was/is the tranny low on oil? Mark.

(quoted from post at 12:23:08 10/18/22) I am thinking input shaft (front) bearing has seized. Was/is the tranny low on oil? Mark.

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I m thinking bearing also. Transmission oil is pretty milky.
Clutch also has a lot of up and down, side to side play in it.

Hello BKS welcome to YT! Are you at all familiar with
these older IH tractors? Does this tractor have the
shuttle shift forward and reverse option? Not real
common, that could add to the possibilities of what
may be causing the issue. Otherwise does it have a
Torque Amplifier? If it is a regular gear drive machine
with the TA it may have some problem with bearings on
the input shaft or on the transmission lower counter
shaft. Or something is jammed in the gears of the
lower shaft. I believe that something could also be
wrong in the TA. I cannot pinpoint what exactly that
might be, it is not a real common occurrence to have
this type of a symptom from a TA. A while back there
was a poster on here who was reporting a similar issue.
I will have to look back and see what the resolution
may have been. If I remember the member posting
about it stopped replying to the thread. As an addition
I will add a link to the CNHI online parts page for that
tractor. Go to the Clutch section and subsection 098.
Under the cover number 7 is where the small direct dry
clutch for the TA. Might pull that off just for the heck of
it to look down in there. The thing about it is that
clutch stops when you are operating in low TA so it
really cannot cause this problem in my way of thinking.
Which does lead to the question of if the tractor dies
the same thing in low TA. Another I might suggest it to
see if having it on a hard surface and in 4th gear low
range if two men one on each rear tire can still move
the tractor forward. This is because the low range is
driven by a one-way clutch that overruns in a scenario
where the engine is supposed to hold back the tractor
through the drivetrain. If it can be pushed this would
tell you the transmission lower shaft is not locked up.
May even give this a second try with the clutch
blocked down. Lastly, in the diagram above remove the
next plate down, number 5. This will uncover the PTO
drive gear compartment in the front and the TA gear
section in the back. I have no idea what you will see
but look around anyway. The gears of the speed
transmission on that model are right below the
gearshift and slightly behind it. The whole rear cover
has to come off to look in there.
CNHI IH 606 online parts diagrams

Thank you for all the help.
I ll look at the diagram and go from there.