If that was a problem they wouldn't work when they were new.

 

I think I am answering this for myself: Vacuum does not pass through the inner-hub area and large bearings we are greasing through the ABS hole.

Vacuum passes through the hub via a passage into the lockers.

I cannot visualize 10hg of vacuum sucking through packed-grease.

 

That's true, I couldn't remember where the air went.

 

So my 99 super duty does not have front abs , is there a way to grease these bearings without disassembly ?

 

I don't think you can unless you replace them with abs bearings and do not connect the sensor.

 

"If that was a problem they wouldn't work when they were new." EXv10 quote

It would appear (though we can't see it) that the sealed unit-bearing assembly is not heavily greased, from the factory. I can understand how vacuum could suck through a lightly-greased assembly. Yet, we are PACKING grease in this hub. Vacuum cannot suck through packed grease without sucking the grease up into the vacuum port, I believe.

Like the other guys said it would, the ABS-sensor came right out, and grease went right down that access-hole. A LOT of grease. I used some old oil-gauge tubing and the brass hardware that went with it (scrap-stuff) to down-size the grease gun hose. Then you gotta hold your finger over the ABS-hole while pumping the grease to really get it to pack down in there. It was about 60 pumps and then the grease was forcing back-out. I cleaned the ABS-hole out with a Q-tip and closed it up.

After reassembly, we road-tripped the 2005 F250 several hundred miles. It worked very well. :-)

Thank you, fellow Ford men for the advice. The hub-greasing gives a bit more peace-of-mind.

RTFLDGR