Birfield rebuild (1 Viewer)

[Shooter1972]

Thoughts an these die grinder marks? Just a poor casting or a PO mod?

 

[too tall]

Those marks look like they are from a birfield. what does the birf look like?

 

[Shooter1972]

Those marks look like they are from a birfield. what does the birf look like?

Spotless and in pristine condition

 

[rkymtnflyfisher]

PO opened up the mouth of the knuckle to allow a later model birf to be installed, probably happened during a disc brake upgrade.


That would be my thoughts without knowing if you have disc brakes or what year your rig is.

 

[pb4ugo]

When you removed the lockout, did it have a snap ring on the end of the birfield? I dont think they're grinder marks. They appear deep in the ball, the marks are the same depth or deeper in the ball. The scoring looks like the birf was rubbing the inside of the ball. My guess it was run without the snap ring and the birf slid in towards the diff. It probably wobbled slightly too. It could be a compromised birf, but doubt it.

 

[Steamer]

Another guess, if it's just one side, damage from a blown birefield that's since been replaced.

 

[Shooter1972]

When you removed the lockout, did it have a snap ring on the end of the birfield? I dont think they're grinder marks. They appear deep in the ball, the marks are the same depth or deeper in the ball. The scoring looks like the birf was rubbing the inside of the ball. My guess it was run without the snap ring and the birf slid in towards the diff. It probably wobbled slightly too. It could be a compromised birf, but doubt it.

Snap rings where in place, one thing that is hard to see in pics is that the cuts are not centric, as in they where cut in on axis. They can be as much as 15 degrees offset from themselves. Definitely man made.

 

[Shooter1972]

Another guess, if it's just one side, damage from a blown birefield that's since been replaced.

Yes only one side, unfortunately zero ability as the previous owner is long dead

 

[Shooter1972]

PO opened up the mouth of the knuckle to allow a later model birf to be installed, probably happened during a disc brake upgrade.


That would be my thoughts without knowing if you have disc brakes or what year your rig is.

Still original drums

 

[pb4ugo]

Snap rings where in place, one thing that is hard to see in pics is that the cuts are not centric, as in they where cut in on axis. They can be as much as 15 degrees offset from themselves. Definitely man made.

OK.

Steamer could be right. Maybe from a broken birf, then a po tried to clean up the ball with a small grinder or burr. I dont think it s a factory thing. Either way it doesn't really matter.

 

[Shooter1972]

OK.

Steamer could be right. Maybe from a broken birf, then a po tried to clean up the ball with a small grinder or burr. I dont think it s a factory thing. Either way it doesn't really matter.

Didn't think so but wanted to check.

 

[Shooter1972]

All parts blasted and now for 2 good coats of POR15. May just go ahead and replace the locking hubs as after blasting with walnut shell realized the original chrome plating on the rotator knob was mostly peeled off.

 

[Shooter1972]

View attachment 2509181View attachment 2509182View attachment 2509183View attachment 2509184View attachment 2509185All parts blasted and now for 2 good coats of POR15. May just go ahead and replace the locking hubs as after blasting with walnut shell realized the original chrome plating on the rotator knob was mostly peeled off.

Big improvement