Powerfeed Repair for BP

K

Kroll

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Guys I'm kinda at a stopping point on some repairs so I thought I would start another which is cleaning and checking out my powerfeed.It does work but only ran it for min or two.Anyway was just going to do a together cleaning but I just had to look inside found some old caulking I guess due to it leaking some.All I found was caulking and no gaskets,so either there should been gaskets or the caulking is correct sealer.Anyway there was very little oil and lots of junk so I just had to start taking it apart for piece by piece cleaning.So in doing so I checking the cord on the motor and I see it is split and dried out.But I just little nervous about taking the motor apart to get to the bottom and replace the cord.Has anyone taken the motor apart to replace the cord,any advice to give a first time repairer person?IMG_0683.jpg
 
That's just a standard 3 phase motor so rather simple. Just pull off the end bells and replace the cord. Might look at the bearings at the same time.
 
i take motors apart almost daily
the best place to start is to mark the relative position of the end caps in relation to the field winding.
i use a punch and hammer and make dimples or i'll scratch lines into the interface of the field winding and end cap
at the base of the cord is a plastic clamp that holds the cord into the end cap, squeeze the clamp and it will pull out if you squeeze it tightly
the end cap will come off after the fasteners are removed.
assembly is the reverse
 
I need post pics of the ends,na its just 110v motor forward/reverse.There are no screws on the end where I need take it apart,on other end is worm gear.There is two screws on shaft end that I guess goes all the way through.I may try the pliers trick and see if I can pop out that plastic piece see if enough wire that I can make joints on.
 
the 2 screws most likely go all the way through the motor and clamp the wired end to the end cap and field winding :)
 
The blue caulking is standard for a 6F and 8F feed. The lube window goes just below the caulk. If you mean a lot of metal for the junk you found in the bottom, either the gear on the motor, or the spiral gear that it meshes with are gone and it will work until you put some pressure on the feed and then slip at the point it's bad. Any way you look at it if they are bad, you got problems because the motor and the gear (if you can find one) are BIG bucks. For that reason alone I wouldn't mess with anything on the motor.
 
Sorry, that’s not a 3 phase motor. More like a DC brush type that is found on the 6F and 8F. Very simple and straight forward to repair. Maybe take some care when trying to clean out the carbon dust! I have work on many, like them very much! Good Luck…Dave
 
As an aside, I took my add-on power x-axis feed apart to “fix” it. Wow, what a nightmare of stuff inside there. Ended by buying a new unit.
Hope the Bridgeport is more reasonable. Having a separate motor is problem a good sign. The aftermarket models are compact and highly optimized inside.
 
That plastic cord retainer thing is called a "Heyco" (it's a brand) everyone uses them. Theres a special tool for it, but you can use pliers- it's actually easier from the inside IIRC- warm it up first to soften the cord
And yes the early ones were DC brush motors, pretty reliable
mark
 
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