4WD syst - no "CLACK CLACK" from my HUBS

Hi all

I have a problem too with my 4WD system :sick:
I change all my caoutchouc vacuum hoses by silicon hoses.

One of pipe was blocked. I freed it (is it correct :whistle: ).
All my servo-valve are ok and I have no flashing light
My vacuum intake operates (jimny 2001)

But I have no "clack clack" from my hub :dry: :dry: :blush: :blush: .

Do you think that I have leak in my vacuum pipes or my vacuum Hubs???

Perhaps , I have a leak on the lip-seal track from my hubs :sick:



lip-seal track from my hubs

I make a better picture later

What do you think about some ideas ???

• increase the vacuum to compensate the leak
• invert the system and using pressure to close my hubs
• repair the track

Heeeeeelp

Its funny because my 4WD system works but I have never heard the hubs engage.

Make shore you have the pipes the right way round ie is it sucking them off instead of sucking them on

markyp2000 wrote: Make shore you have the pipes the right way round ie is it sucking them off instead of sucking them on

Getting sucked off :blush:

Far too many of these on this site.

I use a vacuum pump tool to test my pipes to suck. But it is getting sucked off :blush: :blush:

But, when I use a pressure my hubs operate. The pressure is higher than the vacuum pressure and then make operate my hub :blink: . It is for that I think I have a leak to my hubs :blush: