The 2 piece seals have an inner race, or wear surface, that is crimped into the main body.
Some of the 2 piece seals merely require that you use a flat plate to drive them in. Most drivers that I use and have seen are aluminum. There are a few that have a recessed area to avoid contact of the inner part.
Usually damage occurs when using a hammer or too soft of a driver plate.
Heat usually isn't an issue for 2 piece seals until say, the brakes are smoking heat scenarios. This is if the seal is in satisfactory condition.
I know for a fact that mixer trucks and dump trucks get more abuse than a K5. The leverage of the 40s may cause more deflection if the bearings aren't tight enough, but 14FF axles have taken other abuse from overloading quite well. I had 2 tons of rock in the bed of my '95 more than twice. Scaled out of the pit when I did it.
The disc brake conversion means that the axle has been apart from factory, but difficult to tell what seal was installed if you can't see it, or don't know what the difference looks like. Maybe someone went cheap, and didn't pull the bearings out when doing the disc brake conversion?
Some of the 2 piece seals merely require that you use a flat plate to drive them in. Most drivers that I use and have seen are aluminum. There are a few that have a recessed area to avoid contact of the inner part.
Usually damage occurs when using a hammer or too soft of a driver plate.
Heat usually isn't an issue for 2 piece seals until say, the brakes are smoking heat scenarios. This is if the seal is in satisfactory condition.
I know for a fact that mixer trucks and dump trucks get more abuse than a K5. The leverage of the 40s may cause more deflection if the bearings aren't tight enough, but 14FF axles have taken other abuse from overloading quite well. I had 2 tons of rock in the bed of my '95 more than twice. Scaled out of the pit when I did it.
The disc brake conversion means that the axle has been apart from factory, but difficult to tell what seal was installed if you can't see it, or don't know what the difference looks like. Maybe someone went cheap, and didn't pull the bearings out when doing the disc brake conversion?