Borg Warner 4472 : tach wheel

rasbrad said:

I am trying to replace all the bearings in my transfer case, but one of them is behind the tach wheel. (1370-110-002) I can't find a new tach wheel and the existing one has "do not reuse" stamped on it. It seems I have to remove the tach wheel to replace the bearing and am wanting to know why I can't reuse the existing tach wheel. Before removing it I am wondering if anyone here knows the reason the tach wheel can't be reused.

Does anyone have an idea what the problem may be to reuse the tach wheel?

rasbrad said:

I am trying to replace all the bearings in my transfer case, but one of them is behind the tach wheel. (1370-110-002) I can't find a new tach wheel and the existing one has "do not reuse" stamped on it. It seems I have to remove the tach wheel to replace the bearing and am wanting to know why I can't reuse the existing tach wheel. Before removing it I am wondering if anyone here knows the reason the tach wheel can't be reused.

Does anyone have an idea what the problem may be to reuse the tach wheel? View attachment 282494 View attachment 282495

Click to expand...

rasbrad said:

I am trying to replace all the bearings in my transfer case, but one of them is behind the tach wheel. (1370-110-002) I can't find a new tach wheel and the existing one has "do not reuse" stamped on it. It seems I have to remove the tach wheel to replace the bearing and am wanting to know why I can't reuse the existing tach wheel. Before removing it I am wondering if anyone here knows the reason the tach wheel can't be reused.

Does anyone have an idea what the problem may be to reuse the tach wheel? View attachment 282494 View attachment 282495

Click to expand...

I am not familiar with that, but my guess is:
because it is apparently pressed on the shaft, maybe they suspect it might come loose if re-used.
That is strictly a guess, but with an industrial machinery background, I think it is a possibility.
I would be very interested in seeing other theories...
Rod J

View attachment 282494 View attachment 282495

Click to expand...

rasbrad said:

Thanks Rod...

I am leaning toward leaving the tach wheel and that bearing alone, since I can't find a replacement tach wheel.

Click to expand...

MI_Ghost said:

To shed some light on why it is a Do Not Reuse part.
It looks to be an aluminum alloy part pressed fit onto the shaft. Just the act of pulling it off would be enough to cause it to distort and unable to maintain proper fit when reinstalled.

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