Rear Axle Seal Replacement
The brake drum is wet with oil
Brake lining is also wet with oil
Brake fluid has no indication of leaking anywhere
There are two oil seals in the rear axle, the inner oil seal and the outer rubber seal.
The video will show you the axle hub and outside and the inside or back of the brake disk.
I. Replacing the inner Oil Seal
The First Time
I noticed that the brake drum has been wet with oil. I have to see what’s really making this little thing. I detached the wheel and detached the brake drum. I was wondering why the inner part of the brake drum and the brake lining were totally wet with something like grease. But I don’t see leaks from the motor vehicle wheel cylinder and no dissipation from the brake master assembly. So what I did is wash everything and assembled it back and continued to use the vehicle.
The Second Time
They say, history repeats itself and it is true. I saw again that the brake drum was wet. This time I have in mind what is possible since I disregarded the possibility that it’s from the brake system.
Now, to test this and prove that what I did is the right thing, I will be fetching the young people from the Summer Camp in San Pablo City. That is around 60 kilometers away from my place. So I will be running at 120 kilometers to and from.
To see this I will be giving an update tomorrow afternoon when I come back with eleven young people from the camp.
II. Replacing the Outer Rubber Seal
I promised to give you an update on what it took when I test the vehicle and see if what I did is the solution to the problem.
When I got home I did not bother to examine the thing until the following week. It seems the issue is lurking and I have to check it.
For the third time, I want to be sure if the issue has been resolved or is still lurking. Again, I removed one by one the parts and I saw that the brake linings and brake drum were wet with oil again.
In the rear axle hub, there are two oil seals and these are the images:
1. This first seal is placed here:
That oil seal is placed in the axle casing so it will fit in between that axle casing and the axle main bearing.
When the seal is replaced and the axle shaft is put back to its place it will look like the image below. You can see the nuts and bolts tightened together to hold the axle casing and the axle hub.
2. And this outer rubber seal is placed here:
Now, as you can see above the first oil seal, in other words, the inner axle oil seal is replaced already and when you assemble it, that’s how it looks.
For this time let’s replace the outer rubber seal which is the second seal in the axle assembly. But don’t be confused this must be done first before the whole axle assembly is placed back to the axle casing. We have just illustrated how and where the inner seal is to be.
The outer rubber seal is placed in between the axle hub and the brake disc. This will seal oil that may come out or slip out of the axle main bearing.
If this outer rubber seal is installed it’s now time to assemble back the axle together with the brake disc where the axle main bearing is attached.
After it has been assembled it will look like the image below. It’s just a small part of the outer rubber seal is being exposed fitly in between the axle hub and the brake disc.
What we’re trying to solve are the facts below:
- The brake drum is wet with oil
- Brake lining is also wet with oil
- Brake fluid has no indication of leaking anywhere
We have tried our best to solve for the first time by replacing the inner axle oil seal but we did not succeed. Nevertheless, I am happy that it was replaced because I know its time has come and we have to shoot two birds in one stone.
We have come to our sense that oil leakage is on the brake disc, the brake lining, brake drum but it does not come from the motor vehicle wheel cylinder. However, the oil leakage is on the outer side of the brake disc not in the inner side.
If it’s in the inner side and the problem is the inner oil seal it should show some signs in the image below. Don’t worry what you can see now is not a leakage but a spill when I adjusted the brake.
We have discovered the fact that the outer rubber seal has been the culprit why the problem has been lurking after we have done all other things.
After we have replaced that outer rubber seal, now, we have the peace of mind and safer and better driving with the dry brake drum, dry brake lining.
Thank you for reading and please give your comments on the comment box below and I’ll be happy to get back to you and respond to the discussion.