Joined: Jun 09, 2011 Posts: 776 Location: Bellmore, NY
Posted: Tue Jan 31, 2012 8:27 pm Post subject: I pulled off the rear brakes today
to swap out to 11" drums. There are some shims and seals involved, I cleaned them up a little bit, put a thin layer of silicone on the shims, and put them back in. I'm wondering if maybe I should replace them? I looked them up online, and they are fairly cheap. The old oil seal looks like a leather seal inside a metal ring, and I'm thinking that might be pretty close to wearing out!
_________________ 1952 M38A1
Marine core reinforced rear bumper, military transistorized turn signal upgrade, arctic heater, 11" drum brakes, 200L PTO winch, Huffy overdrive, deep water fording kit, RT 68 vehicle mounted radio, Trac Locs front and rear.
www.danhenk.com
I don't like your "thin layer of silicone" approach. Any "thin" layer of silicone is going to be more than the proper tolerances you should be working with on this assembly, and silicone is flexible whereas the steel on steel shims are solid. You probably just increased your axle end play. If you are set on using a sealant, a better solution is copper Spray-A-Gasket, Permatex 80697, which goes on a lot thinner than silicone. But bear in mind that this area is filled with grease, not oil, so not likely to leak.
The old oil seal I think you are referring to ("J") is actually a grease retainer, and is there to keep wheel bearing grease from coming out and getting into the brakes. That's pretty important! The inner seal ("B") is to keep both the differential oil and the wheel bearing grease where they belong. If you've pulled the axles, I suggest replacing this seal and cleaning, inspecting, replacing if necessary, and repacking the wheel bearings if you don't have any personal knowledge of the history of maintenance of this assembly. Who knows what you might find, like bad wheel bearings. _________________ Jim McKim
1952 M38 son-father project
Slowly turning rusty parts into OD parts
Joined: Jun 09, 2011 Posts: 776 Location: Bellmore, NY
Posted: Tue Jan 31, 2012 11:33 pm Post subject:
Well, at this point, the shims have silicone on them. Until i sanded them, they had some rust. Maybe I should just replace all the bearings and seals from the wheel bearings out _________________ 1952 M38A1
Marine core reinforced rear bumper, military transistorized turn signal upgrade, arctic heater, 11" drum brakes, 200L PTO winch, Huffy overdrive, deep water fording kit, RT 68 vehicle mounted radio, Trac Locs front and rear.
www.danhenk.com
Well, at this point, the shims have silicone on them. Until i sanded them, they had some rust. Maybe I should just replace all the bearings and seals from the wheel bearings out
Joined: Feb 16, 2007 Posts: 206 Location: Gold Coast Australia
Posted: Wed Feb 01, 2012 1:49 am Post subject:
Let me be the devil's advocate here....what are you doing with the front brakes? _________________ John GIBBINS
ASE Master Medium/Heavy Truck & Auto Technician 2002 USA
Licensed Motor Mechanic NSW # MVIC 49593 Current
YOU CAN'T TROUBLESHOOT WHAT YOU DON'T UNDERSTAND
Joined: Jun 09, 2011 Posts: 776 Location: Bellmore, NY
Posted: Wed Feb 01, 2012 10:04 am Post subject:
Fronts already done, I did that weeks ago. It has a different setup, and I had to drill out and helicoil two spots, and get new locking hubs. _________________ 1952 M38A1
Marine core reinforced rear bumper, military transistorized turn signal upgrade, arctic heater, 11" drum brakes, 200L PTO winch, Huffy overdrive, deep water fording kit, RT 68 vehicle mounted radio, Trac Locs front and rear.
www.danhenk.com
Joined: Nov 24, 2010 Posts: 1390 Location: Orem, UT
Posted: Wed Feb 01, 2012 10:26 am Post subject:
11's fit behind stock wheels? I thought I had heard about issues there. Maybe it was with civy 15" wheels though. I can't remember. _________________ Brett
'51 M38
PHOTO DIARY OF MY BUILD
Joined: Nov 01, 2011 Posts: 201 Location: Escondido, CA
Posted: Wed Feb 01, 2012 11:57 am Post subject:
Bretto wrote:
11's fit behind stock wheels? I thought I had heard about issues there. Maybe it was with civy 15" wheels though. I can't remember.
Yes, they do. That's what combo is on my M38. There is maybe a 1/2" to spare all around, so I could see why they wouldn't work with 15" wheels. _________________ Jim McKim
1952 M38 son-father project
Slowly turning rusty parts into OD parts
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