Birf to inner axle...got it done

[tyama]

I'm doing a rebuild of the 1970 forty series, and I've torn the axle apart to do a minitruck disk swap. Anyways, I've been dreading pulling the axles apart to do the swap out. I got the axles apart pretty quick with the pipe method. No real problems there.

After cleaning out the Birfs and removing the axle snap ring parts, I fooled around with getting the 40 inner with the minitruck birf. I read Guppy's post about using screw drivers and a helper with a BFH. I wanted to try to get 'em back together on my own so I tried a few things-- none worked. I went in & ate, then thunk for awhile.

I decided to try squeezing the outer ring with a piece of plastic tube & a hose clamp. It worked like a charm. The hardest part was to align the birf ontop of the axle correctly.

What I did was find a piece of plastic 1.5" pipe, cut it to a width of about 2cm, took a piece out so it'd squeeze the snap ring & stuck a hose clamp over it. I lined it up & also moved the inner snap ring down so it have room to move when I pushed the birf down on it.

I put the birf on the axle and whacked it with my trusty oak 2x4. I had to readjust the plastic clamp the first time I tried it as the snap ring didn't seat right. Anyways, the only problem I had is that sometimes you'll move the birf down too far and you have to seat the second, larger snap ring back up & check it so the inner axle and the birf are solidly connected.

The toyota part numbers for the two are 90520-28036 for the larger snap ring and 90520-27091 for the birf's snap ring.

Hope this helps someone out.

Here's the axles test installed after grinding the axle housing.
ty

 

[gwalt584]

great suggestion

Great idea. I was actually doing a search for the part numbers for the snap rings and BINGO, I got a great idea and the part numbers. This should be in frequently ask questions group of posts under the axle section.
Good job. Thanks
Gary

 

[MTDewX8]

I am stilll searching for a good "how to thread" wiht pics on taking mine apart.

how dificult was the over all job? I am going to do the Knuckle rebuild, but since I am half way there I thought of doing the bearings and such. just seems daunting with my time frame and everything else on my plate. oh and the fact i am loosing my garage soon due to House sale. hmmm dotn want to pay some one to do it though. gotta love timing

 

[gwalt584]

knuckle rebuild

Guppies mini-truck disk brake conversion in the frenquently asked question section does a good job of pictures and writeup. A FSM is a valuable source of information.
If I can do it anybody can.
It is a messy job. There are several sources for rebuild kits, SOR, Cruiser outfitters (my vote, Kurt is a great help), and others. Like NIKE's slogan, "Just Do It". Doing it yourself gives a great feeling of accomplishment.
Good Luck!
Gary

I am stilll searching for a good "how to thread" wiht pics on taking mine apart.

how dificult was the over all job? I am going to do the Knuckle rebuild, but since I am half way there I thought of doing the bearings and such. just seems daunting with my time frame and everything else on my plate. oh and the fact i am loosing my garage soon due to House sale. hmmm dotn want to pay some one to do it though. gotta love timing

 

[tyama]

Rebuild time

Hi,

You can do it in a weekend if you have all the parts there and there's no odd thing wrong with the parts you will reuse. Sometimes the parts on the spindle & the hubs have scoring on them and should be replaced. The biggest time drain is cleaning off all the old grease (the spatulas and other plastic scrapping doodads are great for this--I even cut up old yogurt container tops) and cleaning off the parts you'll put back. You should make sure you label all the parts so you know where they came from. The shims on top and bottom of the knuckle are critically important to know where they came from. Some folks use the centering tool, and others have gotten away by replacing the inner axle seals with the good ones from marlin crawlers. It takes more time if you're going to paint your knuckles but a straight rebuild is not too bad.

IIRC, the cruiser outfitter's kit didn't come with the spindle nuts and washers.
best regards,
ty