Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 12, 2025 ...

Rockwell None Drive Front Axle Lubrication.

December 18, 2013, 12:41:21 am

I am in a time crunch I need help figuring this out by tomorrow morning. I hope few of you will see and can help.
Our 94 U225 is on blocks at friends shop & I need to get it out of there by tomorrow afternoon. We noticed a small leak behind the front wheels and took it a part. It needs new seals. I called FT today they gave me a Seal part number A1205U1711 we cross referenced it and that number is 3090973 (Guardian seal by StemCo). I was able to get the seals (wrong one) right before the truck parts store closed (Fleet Pride in Ft Worth). It turned out to be wrong seals. Now I have the seal that we removed in hand and it shows StemCo 2133. I think it is for 9K Ford front end axle seal, not sure. I am hoping that they have it and i can exchange it first thing in the morning. I will go there with the seal that came out in hand. Now my question is for lubrication what kind of lubrication (oil) do i need to put in there ... is it ordinary gear oil? I believe it is oil bath type of set up, perhaps it is also called "Planetary Drive Axle" I don't know. I have this booklet that came with the Coach ( Maintenance Manual No.1 Revised 1-93 Lubrication Rockwell) I am not understanding what kind of oil it requires from the Manual, there is too much information in there for many different models and set ups) in there.
Best i can come up with is for axle model number is FD-931.  When we took it a part it looked to me like a differential oil & it smelled like it too. This is the oil you see through when you take the hub cap out & there is a easy access by removing a red plug to add oil.  What kind of oil do i need to put in there? Please see attached picture.
Thank you for your help,
AL

Quote Selected

Re: Rockwell None Drive Front Axle Lubrication.

Reply #1 – December 18, 2013, 12:57:27 am

Al, gear oil will work. 90/120 w.
  Good luck, Richard B

Quote Selected

Re: Rockwell None Drive Front Axle Lubrication.

Reply #2 – December 18, 2013, 01:06:42 am

Thank you Richard.

Quote Selected

Re: Rockwell None Drive Front Axle Lubrication.

Reply #3 – December 18, 2013, 08:15:03 am

Correct.  Gear lube 85-90 or 90-120/140.  I use synthetic.

BTW, there should be a tag on the front of that axle with exact make and model information.  Don't know if it is exactly the same, but this info from the tag on our 1993 U240 had: Rockwell Front Axle:  model: FD931RSAX 18.  Serial #:  KKA92033939.  Date:  19592-14/02

Rockwell has since been sold to Meritor.



Manuals can be found at: http://www.meritorhvs.com/MeritorHVS_Documents/MM23.PDF

Quote Selected

Re: Rockwell None Drive Front Axle Lubrication.

Reply #4 – December 18, 2013, 06:20:49 pm

Thank you. I was able to find all the parts locally.

Quote Selected

Re: Rockwell None Drive Front Axle Lubrication.

Reply #5 – December 19, 2013, 11:59:29 am

Ditto' on synthetic hub oil. 
I'm partial to Royal Purple, Redline, Amsoil or NEO.
A motorcycle shop will most likely have Redline.
Also, it hurts nothing to pack the bearings with synthetic grease (Exxon) and add a little hub oil.  Do not overfill your hubs (which is common).  The hydraulic pressure of excess oil in the hub is what will get you back for repair (and new seals) faster than I care to think about.  If you can see hub oil on the sight glass, it's full enough. 
I've owned class 8 big trucks with the hub oil looking like it's too low for many years with no issues and a MH is no different.. pc

Quote Selected

Re: Rockwell None Drive Front Axle Lubrication.

Reply #6 – December 20, 2013, 12:52:55 am

Thank you.

Quote Selected