Pajero 4WD Operation of Front Diffs

[edhall]

Hi All,

There is a good item on the Pajero 4WD operation at:
http://4wd.blogeasy.com/article.view.ru ... eID=318776

However, Would anybody be able to help with some basic questions:

Which front diff solenoid is which - blue dot and orange dot? I assume one enages the front diff and the other Disengages.

If out bush and it fails, can I just unplug the 2 vacuum hoses and the system fails to front hubs engaged? (that is, good enough to get me home....no need to carry spare solenoids)?

If I unplug the 4WD 'ECU' under the dash, will the front hubs fail to engaged and the mechanical transfer case still work? That is, I just loose the fancy dash 4WD mode indication? (again, go enough to get me home?).

I'm planning to play this weekend and try to back engineer the operation, but if anybody knows the above for sure that would be great.

[edhall]

Just replyinto to my own question.

Forgot to say - its a 1994 (Gen 2) Pajero that i want to understand the working of....

Thanks....

[Cameron]

there's a hell of a lot of info on this on pajeroclub.com.au forums too. to manually override the diff disengagement thing you just swap a couple of hoses over apparently. transfer case still functions, just your front end wont 'freewheel'
the one that tends to fail is the one that 'holds' the thing in 2wd postition.

http://www2.pajeroclub.com.au/forum/sho ... hp?t=19881 is a good place to start

[NJV6]

Unless you physically break something steel then you will always get home as the 4WD at the front diff is default mode, it taken vacuum to hold it in 2WD.

When the key is off it is in 4WD (at the front diff)

There are no front hubs to break or disengage - they are always engaged and cannot be disengages short of removing 6 bolts and the drive flange.

Don't worry about the system, it is pretty fool proof if used frequently and works well.

that link you posted is a good one to diagnose why they might be flashing if you have flashing top 4WD lights. Chances of the ECU crapping out are slim.

I ahve had to replace one vacuum solinoid (wouldn't go into 2WD at front diff - flashing lights) and one spring on the actual disconnect at the diff from spending so much time in the water & mud, the vacuum wasn't strong enough.