[U.P. SEE]

hello all
the four wheel drive selector switch on on my SEE has three positions; 0 I II, position 0 is for rear wheel operation. position I is for 4 wheel operation, position II is for for locked differential four wheel operation. my question is this: does the selector switch stay in all three positions? mine only stays in 0 and I, it pops back out of the last position.
oh, and as a side note, i cannot get the four wheel drive to engage, but when i hold the selector switch back, i get the rear axle locked in, but no front axle.
thoughts?
upsee

ps. this is my very first unimog, ive had it 4 days.

 

[U.P. SEE]

i am a new guy to this forum. for those who may be curious, here are some pictures of my unimog. it is sitting on its primary stomping grounds my 40 acres in michigans beautiful upper peninsula

 

[tkv000]

It should stay locked in all positions

nice rig, I like it.

The SEE's have a bit different transmission than the 416's AFAIK, but the air lockers are all the same I think, your truck basically has U1300 axles, but a bit narrower from what I've read

BEFORE you tear into the axles to repair the lockers, try servicing them with some air tool oil, you'll find the info in the manual.

Here's a start if you need to repair them:

http://www.benzworld.org/forums/unimog/1479267-diff-lock-seals-worth-doing-just.html

http://www.benzworld.org/forums/unimog/1345070-leaks-lockers.html

 

[U.P. SEE]

i figured that it should. now the question becomes, why does it not stay...

 

[unimog_jason]

If you're not getting 4 wheel drive that first thing I'd check is if the air cylinder that engages the 4 wheel drive is working. It's on the top of the transmission at the back, it's hard to see, but if someone flips the switch back and forth you should see something moving down there.

If nothing is moving then the cylinder might be stuck, line could be broken or the switch is broken.

With the engine off turn the switch to I and listen for an air leak.

The switch should stay in II without holding it there, you might be able to take it apart and clean it up, but you'll likely be best to just replace it.

Jason

 

[U.P. SEE]

With the engine off I can hear an air leak when I turn the 4wd switch. This means the switch is bad? Where does air run when the 4wd switch is turned, and why?
What should I do.
Thanks
Upsee

 

[expeditionimports]

You need to find the exact source of your air leak. It could be something as simple as a ruptured plastic air line, loose banjo, etc. Find where the air is leaking from then you can determine where to go from there.

Time for a squirt bottle of soapy water and some time under the truck.

Cheers,

Scott

 

[unimog_jason]

You have two options as I see it, either lift the cab a bit so that you can get your head in there and isolate the leak or read through the manual and try to figure it out.

The switch and cylinder are in the same general area so you'll likely have a hard time trying to track down the leak from a distance and there is a lot of stuff packed under there so I don't think you'll be able to get your head close enough without a cab lift. A stethoscope might be helpful if you have one though.

The fact that your switch won't stay in the diff lock position tells me it's likely defective or at the very least in need of some TLC and will have to be pulled out and cleaned. I've never look at replacing the switch myself, but I'm going to guess a cab lift might be in order.

If it was me, I would read the manual to help figure out where the various pieces are located and then try to fix it. If that doesn't work I would start unbolting stuff to lift the cab.

Jason

 

[unimogken]

I don't know if you have these or not yet but here is a link from the FAQ's for the SEE manuals. Unimog Hiab Manuals and Brochures - Hiab 550