B95 axle fluid level

[BVFD84]

Hi all, new forum user with first posting. We have a ‘57 B95 and am looking for the rear axle fill level. We just went through the rear wheel cylinders and axle/pinion seals and will be changing the lube. I wanted to see if it’s right to the fill plug or a certain distance below it. I’ll attach some pictures of the axle for reference. 
thanks!

 

 

[BVFD84]

Axle info

[Vladislav]

Hi and welcome to the group!

Answering your question. I honestly don't have the particular point. The most vehicles I have ever dealt with (probably same to you) the oil gets up to the filling hole. But service manual for my 1945 Mack truck (tandem bogie though) prescribes to fill up to a level of one inch lower than the filling hole. There's a nuance that truck has wheel bearings separated from the banjo and they're greased don't get any oil from the differential. Your bearings get oil from the banjo I guess so I'd keep the level up to the edge of the hole. There could be an option to check if you remove one wheel hub and see the level in the banjo the oil starts leaking from the jack shaft tube to where the bearings are expected to be. That would be a required minimum to my understanding but seems easier to just fill up to the plug.

Hope this may help.

Vlad

[mowerman]

hey welcome aboard and good luck,,,,i dont know either ,,,im sure someone will,,bob

[Joey Mack]

So.... even though this truck is decades older than what I worked on.... All service books from my era says , you put your pointer finger in the hole and bend the first knuckle.  If you touch oil, its right... Approx.. 5 MM down from the hole 1/5" American.... 🍻

[fjh]

Key here being it should be about drive axle height! Any diff Mack or otherwise!

[BVFD84]

Ok I went slightly below the fill hole. When I had it apart for brake work the outer bearing was oil lubed and the inner is greased. There’s a seal in the hub that keeps the oil away from the inner bearing. 

[terry]

alot of guys eliminate that inner seal and oil lube both wheel bearings. all what you want to do.   terry

[mechohaulic]

there are a couple of things to consider : 1= did you keep it original with center seal in wheel hub?? 2- inner bearings repacked with grease ?? 3- if inner seals was eliminated and upgraded outer wheel seal installed did you fill hub before outer bearing/ axle installed?? 4- going with idea updated seal change-over ;; recommended filling rear housing would  be ; over fill bango jack up the right wheel allowing gear oil to travel to left side. reason left done first due to filler plug on right side.  then check level when unit on "all fours". Level down slightly add ;; then jack up left side to fill right side wheel. full confidence both wheels have sufficient oil; back on all fours recheck level using the bent knuckle  method. oil running out as plug pulled level way over when expansion considered. don't rely on oil to flow by its self to wheel bearings .had customer doing his own brake job(before out board drums) didn't tip or fill hubs;;; cost him a new banjo .