Jet HVM728 Horizontal/Vertical Mill Electrical Panel Issue

Grampaof4

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Thank you for the quick response! I greatly appreciate your assistance.

The spindle housing to ram interface. Although it seems that the document is referring to 051 as a crossrail and 517 appears to be a hex nut?

Anyway, in the attached photos, below the WISECO sticker are the shafts which govern the rotation. The right one is the lock, the left turns a worm gear which rotates the head (accessible from either side of the machine) When the lock is engaged, the head can still be rotated about 2-3 degrees. When forcing it to rotate these few degrees when it is locked, the worm gear shift will move in and out. I see no tbolts to tighten this in place.
The other photos show beneath the access cover on top of the ram- this seems to be the only point of interface connect between the two sections, but I am not sure how to go about disassembly, as I am not sure what I am going to discover once I start wrenching.
 

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Grampaof4

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Now that I am looking at it again, it looks like this is a spanner nut and adjustable locknut specifically to adjust the rotation backlash. Maybe just needs adjustment?
 

Ulma Doctor

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Now that I am looking at it again, it looks like this is a spanner nut and adjustable locknut specifically to adjust the rotation backlash. Maybe just needs adjustment?
can you post a picture of the other side of the milling machine, opposite of the wiseco sticker ?
 

Grampaof4

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Absolutely.
 

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Ulma Doctor

Infinitely Curious
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Now that I am looking at it again, it looks like this is a spanner nut and adjustable locknut specifically to adjust the rotation backlash. Maybe just needs adjustment?
i wonder if enough torque was applied to the spanner nut, if that would lock the head to the ram
 
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