M416: How to determain if I need to replace my bearings

Quarter-ton trailer series, Wanted, USED PARTS FOR SALE NO EBAY or COMMERCIAL SALES., and Knowledge Base
Post Reply
User avatar
1stSgtUSMC
G-Staff Sergeant
G-Staff Sergeant
Posts: 59
Joined: Fri Apr 03, 2020 4:20 am
Location: Maine then South Carolina

M416: How to determain if I need to replace my bearings

Post by 1stSgtUSMC » Fri Apr 10, 2020 11:03 am

Fellas,
I just bought my trailer and need to know how do i determain if I should replace the bearings on my M416? It tows great, replacing the grease is a no brainer, it is the bearings im concerned about. They are so cheap, I dont see why I wouldnt. Thoughts?

S/F

Kevin
Semper Fi
1stSgt USMC Active Duty
1952 M38
1966 614M Trailer


Ron D
G-Major
G-Major
Posts: 923
Joined: Thu Aug 07, 2014 9:19 am
Location: Dorchester County SC

Re: M416: How to determain if I need to replace my bearings

Post by Ron D » Fri Apr 10, 2020 12:15 pm

Hi Kevin,
Suggest jacking it up. Assume lug-nuts are tight. Grab the wheel and tire at 3 and 9 o'clock and give it a shake. Feel any movement? Grab the wheel and tire at 12 and 6 o'clock and shake. Any movement? If no movement and the wheel spins free and smooth with no noise, you're probably ok.

But nothing beats a visual inspection to be sure. Get yourself a hub nut socket wrench and a Tech Manual (available for free download at willysmjeeps). Easy to take down. You're right, the bearings and races (cones and cups) and the seal are cheap insurance.

Are you moving to P.I. ?

Good luck!
Ron D
1951 M38
1951 M100

User avatar
1stSgtUSMC
G-Staff Sergeant
G-Staff Sergeant
Posts: 59
Joined: Fri Apr 03, 2020 4:20 am
Location: Maine then South Carolina

Re: M416: How to determain if I need to replace my bearings

Post by 1stSgtUSMC » Fri Apr 10, 2020 12:46 pm

No Belton SC. I was a Hat at PI. Where can I buy the oil seal? What size hub nut socket wrench?
Semper Fi
1stSgt USMC Active Duty
1952 M38
1966 614M Trailer

Ron D
G-Major
G-Major
Posts: 923
Joined: Thu Aug 07, 2014 9:19 am
Location: Dorchester County SC

Re: M416: How to determain if I need to replace my bearings

Post by Ron D » Fri Apr 10, 2020 1:12 pm

Our most gracious host of this forum, gentleman, scholar, and venerable vendor of MV parts :D (Mr. Ron Fitzpatrick) :D has the hub nut socket wrench at https://www.rfjp.com/p-1249-tool-wheel-socket-a692.aspx

I didn't look, but he probably has the seal as well. I'm not sure if the M416 uses the same seal as the M38 and M100 use and I'm pretty sure the M416/M416B1 trailers use different parts, but not positive of that. Measure twice and cut once before ordering. If not, the other venerable MV parts vendors usually have them: Matt @ QTM, George @ AJP, Brent @ BMJP, and John @ MWM, among others....

I have a sister in Moore SC and I'm in the Low Country outside Charleston (Scott Schiller's stomping ground :D ). There's other jeep nuts up around York and Richburg I'm aware of. You won't be lonely!
Ron D
1951 M38
1951 M100

Ron D
G-Major
G-Major
Posts: 923
Joined: Thu Aug 07, 2014 9:19 am
Location: Dorchester County SC

Re: M416: How to determain if I need to replace my bearings

Post by Ron D » Fri Apr 10, 2020 1:34 pm

Kevin,
On second thought....I own a M100 trailer not the M416, so I'm not positive the hub nut socket wrench is the same size as the one I pointed you at.

That $10 socket wrench for the M38 and M100 hubs is 2-1/16th inch. The M416 might be the same size or not. Sorry for the confusion.

The M416 tech manual is here > http://willysmjeeps.com/downloads/TM_9-2330-251-14.pdf
Ron D
1951 M38
1951 M100

rjbeamer
G-Colonel
G-Colonel
Posts: 1406
Joined: Mon Jul 06, 2009 4:55 pm
Location: Oakdale Ca

Re: M416: How to determain if I need to replace my bearings

Post by rjbeamer » Fri Apr 10, 2020 1:56 pm

Yes the M416 Socket wrench is the same as the M100. The bearings and seal are NOT the same however.

The seal is a National #472018
Any O Reilly auto parts store can have them in 24 hours or less.


Roger

User avatar
1stSgtUSMC
G-Staff Sergeant
G-Staff Sergeant
Posts: 59
Joined: Fri Apr 03, 2020 4:20 am
Location: Maine then South Carolina

Re: M416: How to determain if I need to replace my bearings

Post by 1stSgtUSMC » Fri Apr 10, 2020 2:29 pm

You gentlemen are great Americans! Thank you for your help.

Semper Fi,

Kevin
Semper Fi
1stSgt USMC Active Duty
1952 M38
1966 614M Trailer


Post Reply

Return to “Trailers 1/4 ton”

Who is online

Users browsing this forum: No registered users and 52 guests