Bob Deroeck
02-18-2012, 11:32 PM
Still working on recommissioning my 1974 PM 66.
I took the reset switch assembly off the motor and saw dust poured out from the motor casing. That, plus concern over whether there was any viable grease in the bearing made me decide to remove the motor and open it up for cleaning and inspection. Breaking the motor down went pretty well, except removing the drive pulley from the end of the shaft. I'll need to get a gear puller to get it off.
The drive pulley on the arbor shaft was floating freely. The set screw was tight in the screw hole in the pulley, but was not tight against the shaft. As I was removing the v-belts the pulley slide right off the shaft. The tapped set screw hole goes into the groove in the pulley that takes the Woodruff key. The Woodruff key is shorter than the groove in the arbor shaft and the set screw in the pulley is located on the outboard end of the arbor shaft. I'm trying to figure out if the inner tip of the set screw is supposed to screw up against the top of the Woodruff key or if the Woodruff key is supposed to be inboard of the set screw and that the set screw tip is supposed to screw up against the inside of the groove in the arbor shaft. I'd appreciate any advice on this subject.
I have the same question about the Woodruff key and set screw for the pulley on the motor shaft.
BTW, the TEFC Baldor motor had about 1/2 cup of saw dust inside the casing. I can't figure out how it got there, since the gaskets for the capacitor cover, the electric wire connector box cover, and the reset switch cover all appear to be sound. I suspect the motor had not been opened since it was installed in 1989. It also doesn't look like it's been greased in decades. There was about a 1/2 teaspoon of grease in the outboard bearing with just a trace of grease within the ball bearing cage. Fortunately, the bearing still seems to be good. I'll inspect the inner bearing after I get the pulley removed. The contact points on the static portion of the centrifugal switch are good and the dynamic portion is in good shape, though it was covered in sawdust. Looks like sawdust on the centrifugal switch was the cause of the starting problem I had a few days ago.
Bob
I took the reset switch assembly off the motor and saw dust poured out from the motor casing. That, plus concern over whether there was any viable grease in the bearing made me decide to remove the motor and open it up for cleaning and inspection. Breaking the motor down went pretty well, except removing the drive pulley from the end of the shaft. I'll need to get a gear puller to get it off.
The drive pulley on the arbor shaft was floating freely. The set screw was tight in the screw hole in the pulley, but was not tight against the shaft. As I was removing the v-belts the pulley slide right off the shaft. The tapped set screw hole goes into the groove in the pulley that takes the Woodruff key. The Woodruff key is shorter than the groove in the arbor shaft and the set screw in the pulley is located on the outboard end of the arbor shaft. I'm trying to figure out if the inner tip of the set screw is supposed to screw up against the top of the Woodruff key or if the Woodruff key is supposed to be inboard of the set screw and that the set screw tip is supposed to screw up against the inside of the groove in the arbor shaft. I'd appreciate any advice on this subject.
I have the same question about the Woodruff key and set screw for the pulley on the motor shaft.
BTW, the TEFC Baldor motor had about 1/2 cup of saw dust inside the casing. I can't figure out how it got there, since the gaskets for the capacitor cover, the electric wire connector box cover, and the reset switch cover all appear to be sound. I suspect the motor had not been opened since it was installed in 1989. It also doesn't look like it's been greased in decades. There was about a 1/2 teaspoon of grease in the outboard bearing with just a trace of grease within the ball bearing cage. Fortunately, the bearing still seems to be good. I'll inspect the inner bearing after I get the pulley removed. The contact points on the static portion of the centrifugal switch are good and the dynamic portion is in good shape, though it was covered in sawdust. Looks like sawdust on the centrifugal switch was the cause of the starting problem I had a few days ago.
Bob