Mog-9 Build Thread.... !!! PICS !!!

[Greg72]

A few new progress pics of the RF knuckle...... mostly cleaning and painting of the original parts, and a few reference photos for items that I'll need to purchase (small seals, o-rings, paper gaskets, etc)

[Greg72]

Interesting data point:


I called Scott over at Expedition Imports to get some of the small replacement parts and asked him a little bit about those bronze guides for the inner C's. He mentioned that the correct installation requires the bushing to be soaked in hot oil (as mentioned previously) for something like 8 hours and that there is a special Mercedes tool (of course! ) that you need to use to press it in place and set it correctly.

I don't know if I understood him correctly but it sounded like he was describing it as a sort of eccentric bushing which needed to be aligned properly. It sounded like if this bushing was simply pressed into place without also getting the alignment perfect, this could lead to the "backing out" issues that people have described. He also suggested the use of the Loctite Green (Bearing retainer type) to hold things in place.

Anyway, it's more food for thought. It really is annoying how many specialty tools are required (and either don't exist anymore, or are insane $$$) to "properly" service one of these axles.

[FrankenRover]

I would also suggest that once it is together and lubed you cap the lower ball joint zerk fitting. It pretty vulnerable.

[Greg72]

Not much progress when the temperature is -10 F....

Got a few more parts cleaned and painted before giving up and going back in the house. It was hard keeping the shop warm, and painting with the doors closed isn't all that brilliant of an idea.





-G

[dietercas]

this is the real shit , i did it my self and i am not happy the way it is assembled, to losen them i needed 50 ton also to re assemble 50 ton an loking whit the eye if its good , the joints ? half and half good
realy shit now it runs well but i do not overspeed 60 km /u often

[unimogken]

Originally Posted by Greg72

It really is annoying how many specialty tools are required (and either don't exist anymore, or are insane $$$) to "properly" service one of these axles.

I know that Scott has mentioned before that they had a tool rental program for some of their tools so you might want to check with him to see if they rent that one out.

[uninformed]

how hard would some of these speacialty tools be to reproduce..

[Agrover]

Originally Posted by Greg72

Not much progress when the temperature is -10 F....





-G

Those CV joints are insanely complicated and expensive looking.Do they have an equalising ball and socket device like a Spicer double cardan joint?I would think not, and If not would there be enough space in the Cs to just siamese 2 spicer universal joints with bolt or weld together flanged yokes for the middle section? and reworking Dana style yoked axle shafts if doing a custom width housing?
agrover

[Aaronius]

Originally Posted by Agrover

Those CV joints are insanely complicated and expensive looking.Do they have an equalising ball and socket device like a Spicer double cardan joint?I would think not, and If not would there be enough space in the Cs to just siamese 2 spicer universal joints with bolt or weld together flanged yokes for the middle section? and reworking Dana style yoked axle shafts if doing a custom width housing?
agrover

You mean something like this? http://www.pirate4x4.com/forum/showt...ight=cv&page=2

The CV's aren't that complicated, just odd. They function quite well, so if it ain't broke...

[Agrover]

Originally Posted by Aaronius

You mean something like this? http://www.pirate4x4.com/forum/showt...ight=cv&page=2

The CV's aren't that complicated, just odd. They function quite well, so if it ain't broke...

No I was thinking of a CV joint made from 2 standard spicer joints back to back, not a single D60 joint.I would think 2 d44 joints operating at 25 degrees each would still be stronger than a single D60 joint operating at 50 degrees.
The Mog Cvs may function well an all, but they appear to be unique to mogs and probably pricey .

[xtremexj94]

Any updates Greg? Also wondering if you could post up a pic of a front upper outer stub shaft without the bearing on. I need to have a quick look at something and I haven't been able to find anything online that show's just the stub. Thanks.

[Greg72]

I've got some custom CNC bling on the way (Shipped last night).... that will be the next real update.


As for the stubs, I have them set aside but never pulled the gear/bearing off so I don't think a pic is going to do you much good. I don't like disassembling things more than I have to for fear of losing parts, or forgetting how to re-assemble after weeks away from the workbench!!

[xtremexj94]

Originally Posted by Greg72

As for the stubs, I have them set aside but never pulled the gear/bearing off so I don't think a pic is going to do you much good. I don't like disassembling things more than I have to for fear of losing parts, or forgetting how to re-assemble after weeks away from the workbench!!

Yeah, I know that feeling all too well. A pic of the CV side is really what I'm looking for.

[tjmark]

Hey Greg been enjoying your build and the pics. What is being CNCed?

Will this work for ya?

[xtremexj94]

Originally Posted by tjmark

Hey Greg been enjoying your build and the pics. What is being CNCed?

Will this work for ya?

That's exactly what I was looking for Mark. Sorry to clutter your thread Greg.

[Greg72]

Originally Posted by tjmark

Hey Greg been enjoying your build and the pics. What is being CNCed?

Will this work for ya?

Front and Rear Spidertrax 3.5" axletube -> to -> Mog 404 portal box adapters...


So far only the fronts are done (these weld to the axletube and bolt to the inner "C")...










The rears are a little more involved because I'm having them made to adapt directly from the axletube to the large perimeter bolt pattern on the back of the portal (I'm elminating the 404 intermediate housing adapter).

Hopefully the rears will be done in a few more weeks. I want to get the rear set up with the complete Exaxt disc brakes, wheels, tires, etc and set the track width with everything in place. Once I have the rear figured out, I'll know what my front track width has to be to match and I can cut down the axletubes (measure twice, cut once!!! ).

I really want to push the front pumpkin as hard to the PS as I can to miss the oilpan, but then I end up with some crazy framerail modifications to allow for some uptravel on that side. There are going to be problems to solve no matter what....


-G

[camomog]

So are any of these pieces going to be available to buy for those of us wanting to build Mog-9's?

[Greg72]

You'll have to ask weps..... Maybe he can convince Branik to offer something.

Personally, I'm having a hard enough time getting my own build finished so I don't have any time left over to make "extra" parts to sell...

These axles are really tedious and expensive to build. Even if ALL of the custom parts were available off-the-shelf it is still a huge financial commitment. I just keep spending and spending and telling myself that it will be worth it when they are finally finished.


-G

[weps]

Originally Posted by Greg72

You'll have to ask weps..... Maybe he can convince Branik to offer something.

These axles are really tedious and expensive to build. Even if ALL of the custom parts were available off-the-shelf it is still a huge financial commitment. I just keep spending and spending and telling myself that it will be worth it when they are finally finished.

Thanks for the kind words.
Branik does currently make the flanges, but they are not as intricate as the ones pictured. 125$ a pair (yeah, they have a yellow star)
You have the 'tedious' part down pat. Cool when they are done, but a lot of work, and it seems 'everything' needs some mod or another.
I regeared my rig for the TREC race, and LOVE the new speeds that I can reach even with my doggy motor. swapping the center 9's was about 1.5 hrs per axle. I like that alot.
I will probably never go back to the 3.5 center section gears though.

[Greg72]

Andy,

What are you running for gears now in the chunk? 2.47? 2.50? 2.75?

I'd love to run a set of 2.47s but still can't find any sources where I can buy them "new" or NOS. Plenty of sources have them used, but running used gears really seems like a crapshoot....


-G

[weps]

I am running 2.75 gears. I have had good luck running used gears. One set I got off of craigslist for 5$
shipping was 15......

[Hvy_Chevy]

you see this one?
http://pirate4x4.com/forum/showthread.php?t=901958

[Greg72]

After a long delay....... I finally have the rear portal box-to-Spidertrax housing adapter photos:








These are fairly self-explanatory...instead of using the 12" intermediate bolt-on factory adapter, I had a machinist go straight from the bolt pattern on the rear of the portal box to the 3.5" opening on the Spidertrax housing. I'm never going to do rear-steer so I didn't see the value of doing it any other way. Also, this gives me a lot more weldable metal in the area just behind the portal box to add bracketry, shock mounts, and bracing. Everything I've read about the Mog adapter indicates that it's nearly impossible to weld to.

I'm hoping to get out into the shop next week to install these. I'll finally be able to set my rear track width and from there I can set up the front axle to match.......then it's time to figure out a front 4-link and steering with whatever room is left over!

[xj9140]

WOW. What were those built from? One and quarter inch plate? CNC end Mill? BADASS

[YELLOWHOBO]

Looking pretty sweeet!

You'll definately be strong enough with those because I have never broke a backing plate. Sure would like to them! What are you going to do for boxes? WEPS, Stock or machine your own?