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Need front wheel vacuum line diagram for locking hubs

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Hi,


Please find it in the link bellow:


http://ww2.justanswer.com/uploads/heavychevy396/2010-01-18_143954_warn_selective_lock_o_matic.pdf



Please accept the solution if it's helpful. Do get back to us for any further query.


Thanks for contacting fixya.com

Posted on Oct 02, 2010

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My 2004 f150 does not always work in 4 wheel drive but I replaced a vacuum line that goes to the front acuator on the front axel, then i replaced the right front hub assembly with a used one and the 4...


The IWE is operated by a common vacuum system. When you say does not work, not sure what you are getting at ( only 1 wheel locks into place, or neither ).

Could be you had the vent and vacuum lines reversed, and this did not keep the IWE gear pulled out and it rounded off on the one you did not replace.

Is the issue the front axle does not lock in, or does the drive shaft not lock in at the transfer case ?

Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

When you get to this point, post back a comment to this problem with the info.

Nov 10, 2010 | 2004 Ford F150

1 Answer

I have a 2006 Ford F-150 5.4 litre the 4x4 will not engage. I can **** into 4x4 and I can't turn the front shaft, in two wheel I can spin the shaft and I can see both sides of the axles turning up to the...


The hubs on this vehicle are vacuum operated and controlled by a module and a solenoid valve. When there is no vacuum applied to the hubs they should be locked in. The hubs will unlock with vacuum applied. Disconnect the vacuum lines at the hubs and see if the axles freewheel. If they do you likely have a hub issue. If the hubs are locked in with the lines disconnected you probably have a faulty solenoid valve.

Aug 08, 2010 | 2006 Ford F-150

2 Answers

Vacume hubs i am looking for the air leak need vacume diagram for a 05 f150 supercrew


IF this is a case that the IWEs will not disengage, it could be the IWE solenoid or the vacuum lines to the IWEs. Could also be a problem with the vent lines from the IWE ( the other vacuum line that runs up into the engine compartment, and just hangs there ).

This is the block diagram of the vacuum lines for the IWE ( not actual routing ). You can use a vacuum pump / gauge to see if the lines will hold vacuum. Don't be surprised if the vacuum lines test OK, there is a TSB on the IWE solenoid where it could ingest water, and allow water in the lines, which will not keep the IWE gears disengaged.

Block diagram of the IWE system
b893440.jpg

TSB on the IWE solenoid ( right click save as )
http://my.voyager.net/~sscully/file_tsb06_08_15.pdf


May 30, 2010 | 2005 Ford F-150

1 Answer

Need to know where the vacume line is for the 4 wheel drive


This is the block diagram, so you can trace them out, it is not an actual picture of the vacuum lines. Once you find the vacuum box, and the IWE ( Integrated Wheel Ends ) solenoid, the remainder should be easy to find.
2d3ebaf.jpg

Quick test is to pull the vacuum lines ( not the vent lines ) at the IWE, and plug the end of them. While you are there, check that the vent lines are not blocked. When you pull the vacuum lines off the IWE, the front hubs will lock into place ( in 2WD, pushing a dead axle ), so you should be able to turn the switch ( ESOF ) or move the lever to 2H ( MSOF ) and the 4WD should work, if it is not a transfer case issue.

Feb 15, 2010 | 2005 Ford F-150

2 Answers

I have the same problem and when i took it to the dealership they replaceed the 4wd actuator. the noise returned the next day and when i took it back they told me that my grill was loose(do i look stupid...


as mrfixit5543 posted, if you have the front hubs locked in, does the noise go away ?
You can lock the front hubs ( without being in 4WD ) by pulling and plugging the vacuum lines on the IWE ( integrated Wheel End ). There are 2 lines, the other is the vent ( routes into the engine compartment, and does not go anywhere, just open end ).
The IWE spring will push the gear together.
There is a TSB for the IWE Solenoid ( what shuts vacuum off to the IWE when you shift into 4WD ) that could have introduced water into the IWE vacuum system. This obstructs the vacuum from holding the IWE fully out, and the IWE gears grind off ( they will round flat if it has gone on long enough ).
Here is a link to the TSB for the IWE solenoid :
http://my.voyager.net/~sscully/file_tsb06_08_15.pdf

If the noise goes away with the vacuum line off the IWEs, order the new IWE solenoid to install it ( vacuum line and a connector, easy to do. When you have The vacuum line off the IWE solenoid off, use a compressor to blow out the IWE vacuum lines ( with them off the IWE ) to clear any water in the lines.
Here is a block diagram of the Vacuum operation of the IWE system, just so you have a reference to work from :
00c6d74.jpg

If you confirm the symptom is cured by having the IWEs locked in, you can leave them this way until you get the new IWE solenoid installed. Jsut keep in mind you are pushing a dead axle ( wheels are turning, locked to the front axle ), so don't try to drag race anyone, and your MPG will suffer a bit.

Jan 05, 2010 | 2005 Ford F-150

2 Answers

I have a 2004 ford f-150 off road 5.4 liter. My


If this is a 2004 Heritage ( old body style ) and the transfer case is known to lock in ( check with truck jacked up, shift into 4WD and try to turn front drive shaft ), the next item to look at is the vacuum disconnect motor for the front axle. This is on the front axle, and will move when shifted into 4WD
3b8c336.jpg


It is item #10, on this parts diagram
b48b167.gif
If you do not have movement in this, check the vacuum lines with a vacuum pressure gauge, to see if vacuum is being applied ( Pink line is 2WD w/ vacuum is operation, Blue line is 4WD w/ vacuum operation ). If no vacuum at the lines, check them back to the vacuum shift solenoids
b684463.jpg
4ef54b0.jpg

Jan 04, 2010 | 2000 Ford F150 Flareside SuperCab

1 Answer

Four wheel drive lights come on but no four wheel drive


The light comes on indicating that the transfer case is engaged in 4wd, but that doesn't mean the hubs are locked. If you have automatic locking hubs, you should check to make sure they are working correctly. This GM vehicle may be equipped with vacuum locking hubs... meaning there is a vacuum line running from the transfer case selector to the hubs on each side. The vacuum makes the hubs lock into place. If those vacuum lines are damaged or missing, they wont lock. If you have electronic locking hubs, they may need to be replaced. Good luck.

Dec 09, 2009 | 1997 Chevrolet Blazer

1 Answer

So how do u fix the rattaling in front hub


You replace the hub lock that's causing the problem. Also replace the vacuum control valve located next to the battery. What happens is water gets into the vacuum lines through the valve and ends up in the hub locks. They get rusted up and stop working. You might need a wheel bearing also, depending on the amount of water in the hub lock.

Aug 28, 2009 | 2004 Ford F150

2 Answers

When I shift to 4 wheel drive the indicator light comes on but the front wheels do not lock. If you manually lock the front hubs the 4 wheels lock and work fine. what is the fix for this problem.


The autolocking hubs are vacuum actuated. If they don't lock then you most likely have a vacuum leak somewhere. This usually occurs where the vacuum line (black rubber hose) attaches to the knuckle on the inside of each front wheel. These hoses get dry and crack. Another simptom of this leak is the AC changing from front vents to defrost vents when you switch to 4x4 so check for this. You could also have a vacuum leak in the hub diaphragm or one of the orings in the hub could be cracked or broken. If you cannot find a vacuum leak then the vacuum solonoid valve may be bad.

Aug 07, 2009 | 2003 Ford F250 Super Duty Crew Cab

4 Answers

My 4 wheel drive won't engage


Sportages uses a vacuum system to lock front hubs - turn the wheels all the way to one side, then look from behind the wheel on the side you are turning 'from" There should be a rubber hose from the vacuum fitting near the wheel opening from the engine compartment to the wheel itself. If these are damages or disconnected, the front axles will engage into 4wd but the hubs will not lock and the front wheels will not be driven by the axles.

Dec 20, 2008 | 2000 Kia Sportage

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