On the tube style rear axles (Foreman, Rubicon, 350 Rancher etc) we all end up with water in our axle tube on the left side, and a brake drum full of water on the right side. Sometimes we even replace the bearings and seals, and STILL get water in there.
Here's why.
This is on my 2006 Foreman FM. I replaced the left axle bearing and seal, but STILL had water getting in there.
Note the hub surface on the old hub, vs the hub surface on the new hub. That grooved area is what seals against the new seal. When you get grooves in the hub, it cannot seal up against the new seal you install, so water still gets in.
In the bikes i've worked on, a lot of them have grass or other debris wrapped around the hub which not only destoys the seal, but also eventually will groove the hub.
Sooo, if you're going to do a rear end rebuild, it might not be enough to replace your bearings and seals. Inspect your hubs and if the sealing surface is worn or grooved, you need to replace the hub(s) as well.
Here's why.
This is on my 2006 Foreman FM. I replaced the left axle bearing and seal, but STILL had water getting in there.
Note the hub surface on the old hub, vs the hub surface on the new hub. That grooved area is what seals against the new seal. When you get grooves in the hub, it cannot seal up against the new seal you install, so water still gets in.
In the bikes i've worked on, a lot of them have grass or other debris wrapped around the hub which not only destoys the seal, but also eventually will groove the hub.
Sooo, if you're going to do a rear end rebuild, it might not be enough to replace your bearings and seals. Inspect your hubs and if the sealing surface is worn or grooved, you need to replace the hub(s) as well.
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