Hi, Take down the cover... they usually snap in by a set of spring wires...then looh ofr a screw or a couple of screws that hold the motor assembly up in the box. If there are no screws then the plate that holds the motor just snaps into the outside box....if that is the case just take a screw driver and pry out slightly on the outside box and snap the plate out and drop it down... The motor will then just be a couple of nuts to release it from the plate...the fan cage often just pulls off of the shaft.
The best I can give is to turn the shaft up so that you can run WD-40 down the shaft between the blower wheel and the shaft...let it soak for an hour and keep repeating...then carefully pull the wheel from the shaft...or carefully wedge a flat bar behind the blower wheel to force it off...
The whole process can be very tedious and time consuming...
Then getting the wheel to grip the new motor can be tough also...The best I can give is to turn the shaft up so that you can run WD-40 down the shaft between the blower wheel and the shaft...let it soak for an hour and keep repeating...then carefully pull the wheel from the shaft...or carefully wedge a flat bar behind the blower wheel to force it off... The whole process can be very tedious and time consuming... Then getting the wheel to grip the new motor can be tough also...
Its too late now, but the instructions above are for the vast majority of Nutone bathroom ventilators that use plastic blower wheels. Nutone 8830 has a metal wheel with a set screw. The wheel is easily removed after loosening the set screw with a 1/8" Allen wrench. There are specialized blower wheel pullers that use plate collars that don't distort metal wheels if the shaft is corroded, but I don't know of any pullers that work on the motor-in-wheel style of the 8832. The best pulling strategy is to drill and tap two small holes through a bar, the wheel, into the hub, avoiding the set screw. I use a cheap flat plate pipe hanger wall flange, they come with a 5/16" tapped center hole. Grind a slight taper onto a 5/16" hex cap screw (hardened type preferred). Attach the plate to the wheel hub and use the hex cap screw to drive the shaft from the blower wheel hub. Without a puller, the wheel distorts if it is is pryed from the shaft and an out of balance wheel will slowly ruin the motor bearings and then vibrate noisily. If a metal wheel must be pryed from the shaft, replace it to avoid ruining the motor it is attached to.Its too late now, but the instructions above are for the vast majority of Nutone bathroom ventilators that use plastic blower wheels. Nutone 8830 has a metal wheel with a set screw. The wheel is easily removed after loosening the set screw with a 1/8" Allen wrench. There are specialized blower wheel pullers that use plate collars that don't distort metal wheels if the shaft is corroded, but I don't know of any pullers that work on the motor-in-wheel style of the 8832. The best pulling strategy is to drill and tap two small holes through a bar, the wheel, into the hub, avoiding the set screw. I use a cheap flat plate pipe hanger wall flange, they come with a 5/16" tapped center hole. Grind a slight taper onto a 5/16" hex cap screw (hardened type preferred). Attach the plate to the wheel hub and use the hex cap screw to drive the shaft from the blower wheel hub. Without a puller, the wheel distorts if it is is pryed from the shaft and an out of balance wheel will slowly ruin the motor bearings and then vibrate noisily. If a metal wheel must be pryed from the shaft, replace it to avoid ruining the motor it is attached to.
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Hi,
Take down the cover... they usually snap in by a set of spring wires...then looh ofr a screw or a couple of screws that hold the motor assembly up in the box. If there are no screws then the plate that holds the motor just snaps into the outside box....if that is the case just take a screw driver and pry out slightly on the outside box and snap the plate out and drop it down...
The motor will then just be a couple of nuts to release it from the plate...the fan cage often just pulls off of the shaft.
heatman101
The best I can give is to turn the shaft up so that you can run WD-40 down the shaft between the blower wheel and the shaft...let it soak for an hour and keep repeating...then carefully pull the wheel from the shaft...or carefully wedge a flat bar behind the blower wheel to force it off...
The whole process can be very tedious and time consuming...
Then getting the wheel to grip the new motor can be tough also...
Its too late now, but the instructions above are for the vast majority of Nutone bathroom ventilators that use plastic blower wheels. Nutone 8830 has a metal wheel with a set screw. The wheel is easily removed after loosening the set screw with a 1/8" Allen wrench. There are specialized blower wheel pullers that use plate collars that don't distort metal wheels if the shaft is corroded, but I don't know of any pullers that work on the motor-in-wheel style of the 8832. The best pulling strategy is to drill and tap two small holes through a bar, the wheel, into the hub, avoiding the set screw. I use a cheap flat plate pipe hanger wall flange, they come with a 5/16" tapped center hole. Grind a slight taper onto a 5/16" hex cap screw (hardened type preferred). Attach the plate to the wheel hub and use the hex cap screw to drive the shaft from the blower wheel hub. Without a puller, the wheel distorts if it is is pryed from the shaft and an out of balance wheel will slowly ruin the motor bearings and then vibrate noisily. If a metal wheel must be pryed from the shaft, replace it to avoid ruining the motor it is attached to.