876 won't move

[cafoose 3,355]

I was pulling my big trailer with my 876 and it stopped moving it. It was doing great and all of a sudden it started jerking like sometimes it moved and sometimes not. I drew a line on the hubs and axles and the line moved about 1/8 of a turn. I took the wheels off and the axle keys both look worn but not sheared. When I pulled the wheels the hubs both wiggled and were loose. The hubs both look worn on the inside key-way. I was able to push the tractor by hand easily about 75 feet to the garage without opening the tow valve. If I just replace the keys and hubs will that correct the problem or do I need to open up the trans-axle? The pictures I took are from both sides

 

 

[squonk 41,155]

Replace the keys and try it. Nothing to lose. I check all my hubs for loosness twice a year

[stevasaurus 22,764]

You should not be able to push it that far without opening the tow valve.  Like Mike said...change out those keys...need to do that anyway, but in the meantime do a couple of tests.  

1. turn one axle and see if the other turns in the opposite direction.  Do this from both sides.  If the axle turns opposite, differential is OK.

2. with the tow valve closed, grab both axles at once and try to turn.

3. with tow valve open, grab both axles and try to turn.

It should be mush easier with the valve open.  Probably the key ways and keys then.

 

[pfrederi 17,741]

No sign inside the hub that the axle key was dragged all the way around.  Only moved an 1/8 inch I doubt that this was yu r real problem (But you need to rebroach your hubs and get new keys> 

 

Pushing 75 ft with Tow valve closed is not a good thing and probably more of you issue...  I know you have a wheelamatic and the manual for that is pretty skimpy (WH wanted to repair by replacement)  Down load the sunstrand manual and look at diagnostics for can push with tow valve closed.  Could have sheared a key in the transaxle also...

[squonk 41,155]

If the shiny part on this axle is from the hub before you took it off, it turned more than 1/8"! 

 

[pfrederi 17,741]

32 minutes ago, squonk said:

If the shiny part on this axle is from the hub before you took it off, it turned more than 1/8"! 

 

 

 

If the hub had gone more than 1/8" you would see score marks on the hub bore   bore still looks rusty to me.

Edited April 12, 2021 by pfrederi

[cafoose 3,355]

28 minutes ago, stevasaurus said:

You should not be able to push it that far without opening the tow valve.  Like Mike said...change out those keys...need to do that anyway, but in the meantime do a couple of tests.  

1. turn one axle and see if the other turns in the opposite direction.  Do this from both sides.  If the axle turns opposite, differential is OK.

2. with the tow valve closed, grab both axles at once and try to turn.

3. with tow valve open, grab both axles and try to turn.

It should be mush easier with the valve open.  Probably the key ways and keys then.

 

@stevasaurus I had a feeling it was inside the case now I believe it is I turned both sides individually and the opposite side did not turn. When I turned the right side it locked up. Then I turned it backwards then forwards and it was free but still not turning the opposite side like something is broken and jamming up the gears and when I go backwards it moves out of the way then I can turn it forward again.

 

 

[pfrederi 17,741]

I think #30 could be your problem.  How big/heavy was your  trailer.

[squonk 41,155]

3 minutes ago, pfrederi said:

 

 

If the hub had gone more than 1/8" you would see score marks on the hub bore   bore still looks rusty to me.

Kinda why I wondered if the hub is so rusty, why is the axle so shiny ? Unless he filed or sanded it.

[squonk 41,155]

[squonk 41,155]

Watched the vids. I say she's broke! 

[cafoose 3,355]

1 minute ago, squonk said:

@pfrederi That's it! @squonk I was just about to post that!

[squonk 41,155]

When you posted:"I was pulling my big trailer "              I thought "oh boy"! 

[cafoose 3,355]

9 minutes ago, squonk said:

Unless he filed or sanded it.

Nope I did replace an axle key a few years ago maybe it's from that. The key was completely broken at that time.

[stevasaurus 22,764]

I don't think it is #30.  It's in your differential...either an axle gear or pinions or both.  The keys in #30 have nothing to do with the axles not turning in opposite directions.  Either way, you have to open it.  

[cafoose 3,355]

1 minute ago, squonk said:

When you posted:"I was pulling my big trailer "              I thought "oh boy"! 

I did pop a couple wheelies when it started moving

[cafoose 3,355]

Just now, stevasaurus said:

I don't think it is #30.  It's in your differential...either and axle gear or pinions or both.  The keys in #30 have nothing to do with the axles not turning in opposite directions.  Either way, you have to open it.  

How difficult is that? Would it be easier to replace it?

[squonk 41,155]

Lots of Hydrogears at the show usually.

[stevasaurus 22,764]

No, it is easier to fix...just don't cause anymore damage.  Paul and I love to guess what is wrong, but I got him this time.  Axle gear and/or pinions...the videos show that.  Paul      .  Once you drop the trans and open it...shallow side down.  You can just pull out the differential and the axle gears and pinions are inside.  A-Z Tractor parts should have what you need.

 

[pfrederi 17,741]

Steve is right I didn't see the video.  Anyway if your hydro was sound other wise  don't try to replace it with an unknown quantity.  These are garden tractors not for hauling things that big doing wheelies with loose hubs when they are 55 years old

[cafoose 3,355]

7 minutes ago, pfrederi said:

Steve is right I didn't see the video.  Anyway if your hydro was sound other wise  don't try to replace it with an unknown quantity.  These are garden tractors not for hauling things that big doing wheelies with loose hubs when they are 55 years old

When you said loose hubs I started thinking I bet what happened was the hubs were doing a hammer action on the gears and that's what broke them. I did have the hydro professionally rebuilt about 27 years ago by Bob's Outdoor Power in Lewisberry, PA who was an old dealer and in business since the late 1940's before they sold out a few years back. They had an excellent reputation for repairing anything related.

[Gregor 4,846]

They are pretty simple once you get inside.

There really isn't much there.

If you pull off the hydro pump, which I did, and would do again, be careful of getting dirt and debris in these holes. They are oil ports. Check you parking brake lever for wear, and repair if needed. May as well order a gasket and seals now. You are going to need them, if you open it up. I made it through, with a lot of help from this forum.

[Horse Newbie 7,075]

20 hours ago, squonk said:

Head 'em up. Move 'em out !

[WHX?? 48,828]

17 hours ago, Gregor said:

They are pretty simple once you get inside.

Says who?!?!?

 

Kidding aside Foose I can fix those hubs. Pm me if interested. 

Edited April 13, 2021 by WHX24

[cafoose 3,355]

1 hour ago, WHX24 said:

Kidding aside Foose I can fix those hubs. Pm me if interested.

I'm getting all the parts I need from @Ed Kennell  That will give me experience opening up a transmission I can drive to his ranch and be home in an hour