702 Roller Stuck In Gear ??

[Moparfanforever 867]

I brought a 702 roller home probably five or six years ago and tore it down and painted most of it and drained the oil out of the transmission , fortunately there was no water in the trans. The tractor would be in neutral and roll around just fine , but the shifter flopped around like a dashboard hula girl on a bumpy road.

 

It has sat all this time in my garage unmolested until today , and i went to move it and the pass. side wheel/tire will not roll ?? The left side tire will roll just fine with no sound from the trans. and the shifter sounded like it went into all gears , but it must be in gear ?? The input pulley turns with no resistance. i took a couple of pics. of the shifter and the roll pin is intact and i see no wear on the ball. Tried to get a pic into the trans. but my camera wouldn't get a good pic , but the trans looks like it is in neutral, the square blocks are not off center , if that makes sense.

 

Anyone have an idea what might have happened just sitting all these years ??

 

Thanks !!

 

Darrell

 

 

[WHX?? 49,462]

Guessing you are seeing the H pattern down the shifter hole. Doesn't sound like stuck in two gears tho. 

[Moparfanforever 867]

I don't think it is stuck in gear either , but i am at a loss at what could have happened just sitting. 

 

Never had one of the trans apart , but I may be getting my chance.

[AMC RULES 37,141]

With the shifter back in place, try to gently roll the tractor back and forth while simultaneously shifting through the gears.

[WHX?? 49,462]

Maybe just a stuck bearing Craig? What's odd that one wheel rolls free but the other locked up? Points to a differental problem. 

Every once in awhile my 702 locks up similar to what you are reporting. Was hopeful that I solved the problem when I went thru the tranny but still does it. Very perplexing. Only way to cure it is as AMC suggestioned.

[Moparfanforever 867]

40 minutes ago, AMC RULES said:

With the shifter back in place, try to gently roll the tractor back and forth while simultaneously shifting through the gears.

I will give that a try and see what happens.

[8ntruck 7,174]

The expected motion would be for the right tire to rotate in the opposite direction as the left tire, or for the tractor to roll.

 

But, the left tire rolls, but the right does not.  If your diff is OK, this means that left axle is not connected to the diff, or the trans is still in neutral and the diff is back driving the trans gears.  Might be that something has given way in the diff, locking the right side, but leaving the left free to turn?  Frozen bearing somewhere in the right side?

 

Just guesses here.

 

Good luck and have fun.  Please let us know what you find.

[Moparfanforever 867]

When the shifter is in neutral , the input pulley and left tire turns free , right tire locked up.

 

The last time I fooled with it four years ago , the shifter was sloppy but nothing was locked up. Guess I shouldn't have drained the oil out of the trans and let it sit ??!!

 

I am going to work on it tomorrow and see if I can figure something out.

[gwest_ca-(File Mod) 11,133]

12 hours ago, Moparfanforever said:

the shifter flopped around like a dashboard hula girl on a bumpy road.

 

She may be dancing because the spiral pin that locks the donut to the shifter is sheared allowing the donut to turn on the shifter.

Have you tried shifting the rails with a long screwdriver?

 

[Moparfanforever 867]

42 minutes ago, gwest_ca said:

 

She may be dancing because the spiral pin that locks the donut to the shifter is sheared allowing the donut to turn on the shifter.

Have you tried shifting the rails with a long screwdriver?

 

 

I don't think the roll pin is sheared , pics above it is still there , but I will check.

 

Never messed with one of these trans before , how do you shift the rails with a long screwdriver ??

 

I am going to go out and cuss at it some more and see if I find anything out.

 

Thanks for all the help !!

[squonk 41,623]

Right side bearing frozen. Differential action will allow the opposite side to turn. Same as making a hard right turn.

[gwest_ca-(File Mod) 11,133]

If the blocks on the rails are centered in the hole that is neutral. Using a screw driver shift the front rail (R & 1) left-(1) and right-(R) to select a gear.

Bring front rail back to neutral and try the rear rail (2 & 3). Sliding rail to left-(2) and right-(3).

One of the rails must always be centered-(N position)

If both rails are centered the transmission is in neutral-(N)

[pfrederi 17,965]

Use a big screw driver and move the U shaped forks till  they line up like this...

 

 

[gwest_ca-(File Mod) 11,133]

[stevasaurus 22,904]

Jack up the rear end.  With the trans in neutral, turn the left wheel in any direction.  The other wheel should turn in the opposite direction.

   Then, put the horse in any gear.  Turn the input shaft in a counter-clock wise direction and see if the brake drum turns...also see if both tires will turn.  (you can hold one of the tires while doing this...the other tire should turn.  Let us know what you see.  

[Moparfanforever 867]

Tried everything everyone suggested and still the axle will not turn. 

 

Steve , trans in neutral and turned the left axle and right axle will not move.

 

Put in gear , turned drive pulley CC and brake drum and left axle moves , not the right axle.

 

I think Squonk may be right about the frozen bearing. Whatever may be wrong , looks like I will be taking it apart. Better start watching your videos Steve. Never been inside one before.

[Moparfanforever 867]

Steve , which YouTube video covers this transmission??  A manual may be handy ,one here on the site ??

 

Thanks Everyone !!

Edited October 7, 2021 by Moparfanforever
Added context

[WHX?? 49,462]

Yep manual here and real easy to open up & we can help every step of the way One of the guys can get you the manual... too stupid here to get it on a dumb phone. 

Fellas ....think maybe he should try a flush first?

[Moparfanforever 867]

I guess I could do a flush , but when I drained the trans years ago there was no evidence of water.

 

The shifter hole had a little condensation evidence , but it looked clean just shining a light in the shifter hole.

 

I think I will run some diesel fuel thru it , you never know what may be in there.

[WHX?? 49,462]

18 minutes ago, Moparfanforever said:

I guess I could do a flush , but when I drained the trans years ago there was no evidence of water.

 

The shifter hole had a little condensation evidence , but it looked clean just shining a light in the shifter hole.

 

I think I will run some diesel fuel thru it , you never know what may be in there.

See what the pros think but thinking a little diesel or kerosene wouldn't hurt. Steve says things are bit less messy if you have to split it. Guessing it was kept inside or under cover? 

[Moparfanforever 867]

It has been in my garage the last five years , who knows before that. Fingers crossed !!

[953 nut 56,125]

Could be one of the bolts in your differential has dropped its nut and managed to slide out to hit the side of the gearbox. Had this happen a few months ago, returned from a show and went to unload  the  and it wouldn't roll. If that is the case on yours get some new nuts for the bolts.

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[stevasaurus 22,904]

OK, trying to figure out what you said: (1) in neutral, turn left and right does not move.  You could turn the left tire though??  (2) in gear, turned input shaft...brake drum and left tire turned, but not right.  

   My thoughts...your differential turns, all gears leading to differential are OK.  At least the pinions working the left tire are OK.  

   Possibilities...no pinions in differential for right axle...no teeth on right axle gear...broken right axle...and a froze bearing.  Teeth on right tire pinions are stripped and jamming the right axle gear.  This picture shows all the parts of a differential like yours.

 

 

 

 

Use this thread for the videos.  This trans is basically the same, just brake drum is on cluster gear shaft instead of mushroom gear. 

 

 

[stevasaurus 22,904]

Here is the trans manual.  You want Section II for your #5025 transmission.  Shallow side down when you open.

 

 

[Moparfanforever 867]

Thanks for all that Steve , big help !! Doesn't look like there is much to them.

 

Sorry I Didn't explain better , but you got it right. Funny thing is , when I bought the tractor it rolled just fine. I drained the oil to check for water ( no evidence ) and it has been sitting about the last four years and when i moved it two days ago the right tire wouldn't roll.