RE: (ET) Mower motor bearings

["Steven Naugler" <snaugler earthlink net>]

Kevin and others,

 

You should not need to cut off the motor flange.  Bill Gunn several years ago gave me the following method of removing stubborn flanges.  (This method is in the archives.)

 

You'll need a 3 inch long grade 5 bolt with the same size and thread as the blade retention bolt, a split bearing puller, and a press.  Your motor shop should have all of these.  If you use a grade bolt lower than 5, it may bend during the flange removal.

 

1.  Soak the flange with some type of penetrating oil, preferably overnight.  (This step helps, but is not absolutely needed.)

2.  Cut off the head of the bolt.

3.  Screw the 3 inch bolt all the way in to the end of the shaft.  It must be fully engaged or damage to the threads in the shaft could result.

4.  Install the split bearing puller around the shaft just under flange.

5.  Place the motor in the press supported by the split bearing puller.

6.  Press on the end of the bolt.  This is where you will damage the threads in the motor shaft if the bolt with the cut off head is not fully threaded.

7.  Be prepared to catch the motor.  When the flange comes loose from the shaft the motor will drop without warning.

 

If you try this techniques, let us know how it worked.  I used it so far on 6 stubborn motors and it worked every time.

 

 

--- Steven Naugler

--- snaugler earthlink net

----- Original Message -----

From:

To: elec-trak cosmos phy tufts edu

Sent: 4/1/01 4:34:26 AM

Subject: (ET) Mower motor bearings

Hey guys,

 

My local motor shop has been incapable of removing the blade mounting flange

from the motor shaft so that the bottom bearing can be changed.  He does

industrial motor work, so you'd think that he would be able to pull these

off.  Any suggestions?