Trickla for separating transmission case halves

[XLT 13]

1961 model 701 I took the transmission out to replace the shifter and unbolted the whole thing but I cannot separate the haves. Any hints or tricks?

[ebinmaine 68,355]

The ones I've done I very gently take a wood chisel that is maybe 1.5 in wide and tap it against the gasket all the way around the case. on the second revolution you can start to see things separating a bit.

 

Be gentle. Be gentle. Be gentle. You'll get the feel for it.

 

[oliver2-44 9,865]

[McGrew 460]

I started mine with a sharp, stiff putty knife.  Danny

[XLT 13]

Got it separated about 3/4".

 

Doesn't seem to want to separate any further.

 

Of course, it's dry as a bone in their looks like it hasn't seen or oil since the 70s.

 

The remnant of a broken shift Rod is sticking down in there rusted stiff. And one of the shifter rails that seems to be stuck down nothing moving

 

Any further ideas?

[ebinmaine 68,355]

4 hours ago, XLT said:

further ideas?

This is where you will want penetrating oil and lots of patience.

 

Look and see wherever it's still attached. Oil that.

Tap it back together a little.

Oil again.

Separate a little.

 

Repeat as needed.....

[Racinbob 11,230]

I've used the wood chisel as mentioned. Works well but you've got yours past that point. It sounds to me like it's hanging up on one of the shafts. Push the case halves back together and clean all the shafts well. Use emery paper to get rid of the burrs, rust etc. 

[953 nut 55,776]

7 hours ago, XLT said:

Any further ideas?

After cleaning up the shafts and lubricating everything you may want to cut four hardwood wedges and tap one into each corner. Go around the transmission case from corner to corner tapping the wedges in to gently pry them apart.

[WHX?? 49,164]

Sounds like the guys have got you covered ... Here's a transmission manual in case you don't have one.

 

492-4004.pdf

[XLT 13]

Thanks for the

help, guys. I tried the hardwood wedges and they did get it a little further separated. I'll keep at it. 

Part of the issue, and I'm not sure is that the shifter was broken off and what remains is frozen pretty badly... does this transmission need to be in neutral to separate the halves? Because it's not... and nothing in that region seems to be moving right now to get it into neutral. 

Edited August 23, 2019 by XLT

[XLT 13]

I ask because that's a step in the manual, but that's for complete disassembly, which may not be necessary for this.

[953 nut 55,776]

11 hours ago, XLT said:

it's dry as a bone in their looks like it hasn't seen or oil since the 70s.

You may want to lay it on one side and squirt a lot of penetrating oil on each shaft, then roll it over the next day and do the same thing. parts that have been dry that long could be rusted in place.

[953 nut 55,776]

48 minutes ago, XLT said:

Part of the issue, and I'm not sure is that the shifter was broken off and what remains is frozen pretty badly... does this transmission need to be in neutral to separate the halves? Because it's not... and nothing in that region seems to be moving right now to get it into neutral.

The portion of the shift lever that is in the shift forks will hold tight to the fork it is in. If need be you may want to drill down through what is left of the lever to free it from the ball. Start small and work your way out to 3/8" That should let the internal part of the shift lever to fall out of the fork.

[XLT 13]

I may have it far enough apart to get a reciprocating saw on that piece... but that might be the 100lb. hammer approach...

[ebinmaine 68,355]

as long as you're careful not to nick anything else I don't see an issue using a reciprocating saw to get that shaft piece out of there

[The Tuul Crib 7,337]

[XLT 13]

Would that chunk of shifter, stuck in one gear or another, keep the case from fully separating?

[WHNJ701 4,165]

if it's that dry, bolt it back together and fill it with kerosene and let it sit for a week or 2

[WHX?? 49,164]

5 minutes ago, XLT said:

Would that chunk of shifter, stuck in one gear or another, keep the case from fully separating?

It shouldn't ....my guess is one of the shift rails is binding or the 1533 bearings don't know if they want to stay in the case half or on the axle shaft.

Jabelman has  a good idea. I have used the acetone and ATF mixture  like that with good results. Actually made parts easier to clean once apart as well.

[XLT 13]

One rail is def. engaged is definitely stuck in its position. I'll take some pics later... unfortunately, have to work in between tractor sessions and bee removals.

[stevasaurus 22,866]

There is nothing in the case that will keep you from separating it.  Make sure you are taking off the larger case half and leaving the shallow side.  Like Bob said, you probably have some varnish or burrs that are holding you up.  Emory cloth or a file for burrs will do the trick.  The key ways could have burrs also. 

[953 nut 55,776]

53 minutes ago, XLT said:

unfortunately, have to work in between tractor sessions

I remember how a job could interfere with fun, no rush, we will be here!        

[Pullstart 63,096]

What if you rotate input shaft and axles while you tap on the case?  It shouldn’t matter if it’s in gear or not when you pull it apart, the shafts just drop in to the bushings/bearings of the case once it’s all clean.