Air operated front hubs

The vaccum puts them on it dont hold them on then the vaccum pulls them off
So if you put them on in 4wd then just take the pipe off the inlet manifold and thay should stay on then bung both holes up

markyp2000 wrote: The vaccum puts them on it dont hold them on then the vaccum pulls them off
So if you put them on in 4wd then just take the pipe off the inlet manifold and thay should stay on then bung both holes up

It's what I inferred after VAXXi's comment

Rear always on, front remains in the way it was when the vacuum system broke (if they were on, they stay on, if not, not).

but it is a matter of a novice to Jimny's like me locating the pipe's inlet into the manifold. I guess I only really need to seal off the inlet manifold pipe like with a bit of tube and a ball bearing or screw in it. The tube end from the hubs just needs protecting against dirt ingress!!

anyone got an exploded diagram as I am sure it could be done easily if its a sliding sleeve by either adding an additional sleeve to stop the slider returning or if maybe a simple spring to hold it in place?
I know with my jeep wranglers they have an vacuum operated system for the front axle and the reason jeep don't connect if to run all the time is both mpg and you can get vibration problems when the vehicle is travelling at more than 25mph-30mph as the need to turn the outer part of the drive shafts(steering) make them unbalanced at speed.

In the past whenever I have had (selectable) freewheeling hubs fitted I always left them in the locked position, rightly or wrongly, but never really noticed any adverse effects, in fact never really noticed.
I like the idea of removing the vac pipe as it is soooo simple (I need simple) - if I could find it. It's worse than spaghetti under there. Don't forget my last version of this was my 1985 SJ413 and even that had pipes everywhere.

Vacuum doesn't keep them engaged, just flips them from one state to the other. I think there are magnets that hold the position.

No doubt you could take them apart and put something solid inside to keep the moving part stuck in the lock position.

Edit: there is a magnet to hold the sliding collar inside the hub (free position the collar is away from the wheel) the out position (drive is maintained by spring pressure.