Are my front bearings grease lubricated?

Hey guys and gals. I know this might be a stupid question, but here it goes anyways.

I have a '99 FLD120 which I'm doing a lot of repairs to and I'm used to seeing oil covers for the front wheel bearings, but This truck doesn't have the oil cap on lt. The picture is the beginning of the repairs I've been doing. She does have almost 1.3 million on her and she has obviously been neglected for a long time. That is the front leaf spring mount that is worn out.

Instead, it has a 3.5" six sided cover where the oil cover should be. Sounds like a metal cover when you tap on it. I would image it spins off with the right size socket. I have a set of service manuals for the truck and can't find this cap anywhere in those service manuals. The books only address oil filled hubs.

2 questions I guess.
1. Would this mean my front spindles are grease lubricated?
2. Could this possibly mean they can be greased by a grease zert on the end of the spindle like a Dexter trailer spindle?

I have a socket coming, but this is bugging me.
If anyone has experience with these types of front bearing covers, please let me know.
Thanks!

 

So, not supposed to be opened then?
With this many miles on the truck, makes me wonder how long they will last.

Should I just let them be if there is no sign of leakage?

 

Once I get the other parts in and installed, I have a short run for it. Only 66 miles.
Maybe I'll put a heat gun on it after the short drive and see what the hub temps are.
If they read normal, maybe I should just let them be.

 

This is the only info I can find on this type of hub and it really doesn't even address the hub itself...


Maybe that will be in the plans the next time I have $2000 to spend on the old girl. I would much more prefer the oil hubs but this repair session is getting pricey already. lol
She's no longer used commercially so she doesn't get run real hard.

 

The grease you are describing sounds like the same stuff for the Vulcan style wheel hubs on boat trailers. Much thicker than gear oil but thinner than regular wheel bearing grease. I actually have 2 tubes of that stuff in my refrigerator.

I do know, from my many years in mining, there is a grease (a.k.a. L.S.T.O. grease) which is thick when not in use but when in use and gets warmed up, it turns into a close gear oil consistency and flows like gear oil. Works great for high impact situations but not sure how well it would do for wheel bearings..

But there is another thing I am also questioning (info not shared yet), and I may never get the answer to this. The truck has almost 1.3 million miles on it, BUT my kingpins are within specs regarding free play. Would it be a safe assumption that the kingpins have been replaced and the hubs were properly serviced when they were done? I can' imaging the kingpins are still within specs with this many miles on the truck. Especially with how worn the leaf spring hanger was worn (Picture earlier in the thread). This is why I'm thinking I'll see what the temps reach on this 66 mile trip.