what are the four holes for in the bottom of the TO-30 differential case?

shona13 · Jan 13, 2014

G'day Coyote machine.
The drawing is to give an idea as to how everything goes together ,Although it does show a nice flat surface Under the bearing hub , it is fairly uneven plus the casting where the retaining studs go through are a bit uneven also there is not a lot of space between the hub and flange again the illustration is just to show how the Flange should be used.
the Flange is one piece and would be drilled to accomodate the hub retaining Studs/Bolts!
Happy Days.
Hutch.

Coyote machine · Jan 13, 2014

shona13 said:
G'day Coyote machine.
The drawing is to give an idea as to how everything goes together ,Although it does show a nice flat surface Under the bearing hub , it is fairly uneven plus the casting where the retaining studs go through are a bit uneven also there is not a lot of space between the hub and flange again the illustration is just to show how the Flange should be used.
the Flange is one piece and would be drilled to accomodate the hub retaining Studs/Bolts!
Happy Days.
Hutch.

Ayy mate! Got it. Will be good when the OP gets her apart so we can see it go back together. Lot a freakin' work for one bogus seal!

dbotos · Jan 13, 2014

Here's a drawing that's actually to scale. Not all details are correct (the outer end of the bearing retainer casting is tapered, etc), but the important dimensions are correct. Brown blocks are a box made of 2x6 lumber (7.75" square inside) with a 3/4" plywood bottom (probably won't even attach that, just make it slightly larger than the sides). Blue piece is the flange shona was talking about. I've got it drawn as a 10 x 10 x 3/4" plate with a 4.375" center bore and 6 clearance holes for 7/16" studs on a 5.188" bolt circle.

Now I just need to scrounge up some 3/4" plate and wait for our friends from Omax to come help us get this beast set up:

That's my truck behind the machine (normal 6-foot bed on the truck). The pallet below the waterjet is 20.5 x 8.5 feet. And that doesn't include the pump or the abrasive hopper (they each came in their own crates).

dbotos · Jan 16, 2014

Got all the brake stuff apart, including getting the anchor pins and felt seal off the backing plate. They used some good cement to hold that felt seal in there - practically had to chisel it out. Anyone got a source or part number for the felt seal? Worst case, I could probably figure out the dimensions and either find something off-the-shelf or make my own.

dbotos · Jan 23, 2014

After 2.5 days, the Omax tech and I (with a little help from co-workers moving the tank and setting the bridge) got the machine set up and running. Had some 5/8" plate (measured 0.660") sitting around that was previously covering a 2'x 2' hole in the floor (hole got filled in since it was in the area where the waterjet is now). So a corner of that plate became this:

Gonna put it to good use this weekend. Will report back...

Coyote machine · Jan 23, 2014

dbotos said:
After 2.5 days, the Omax tech and I (with a little help from co-workers moving the tank and setting the bridge) got the machine set up and running. Had some 5/8" plate (measured 0.660") sitting around that was previously covering a 2'x 2' hole in the floor (hole got filled in since it was in the area where the waterjet is now). So a corner of that plate became this:

View attachment 356550

Gonna put it to good use this weekend. Will report back...

You're gonna press it apart! Yeah man! Bust that thing wide open!:thumbsup:

dbotos · Jan 24, 2014

Hopefully I won't bust more than what needs to be busted. :hammer:

I put the studs back in the casting and put the plate on last night. Had to drop some 1/2-20 nuts onto the studs to act as really fat washers since the studs aren't fully threaded and there was still some solid portion sticking up out of the plate. The shaft was already decently heavy. Now it's got an extra 15 pounds attached to it.

So, I take some measurements of the shaft assembly and some of my 20-ton shop press. Crap - doesn't look like it's going to fit. Then I started looking at the press and realized I could gain about 3 inches by removing the guide bar that the jack sits on (it's about 1.5" thick and the nub on the bottom is about as long). Also, the jack that I've got in there currently is an air/hydraulic one and is slightly taller than the original one it came with, which is just hydraulic (it's the orange one in post #48, page 5). So, with the table dropped to the lowest set of support pin holes and the guide bar removed, I should be able to sit the axle assembly in there with the plate resting on blocks and hold the jack in there to press the shaft out of the casting...

Coyote machine · Jan 24, 2014

Press that puppy! No turning back now! You're within reach of the finish line.:thumbsup:

dbotos · Jan 25, 2014

This morning, I combed through part of the hoard and found a suitable length of 2x6 to make the support box from. Fabbed that with a little help from the miter saw and framing nailer. After that it was time to stick everything in the press. Which turned out to be just big enough - I couldn't even fit the 3/4" plywood below the box. Ended up sticking some thin pegboard scrap in there. Pressing went well, but I ran out of room before the bearing was all the way off the shaft (wheel studs touched top of pegboard). For the second half, I put some 2x4s under the left and right side of the box, but couldn't fit the pegboard in there, so I had to forgo having anything for the shaft to drop onto. Fortunately, it didn't have far to drop and made a satisfying sound when it did. I had put a tether on the top of the shaft just in case since I was holding the jack with my left hand and pumping the handle with the right (probably should have used two tethers, but the shaft stayed upright when it came out of the casting/bearing).