Reply by toolie

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Posted on Delta Unisaw Operating Noise

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2121 posts in 2626 days

#1 posted 06-08-2013 01:18 PM

as good as unisaws are, getting to the belts and motor can be challenging. isolate the cause as motor or arbor generated. i’d remove the top, which will greatly simplify diagnosing what’s going on. remove the wings and note the location of any spacers between the table (two man job to execute carefully and safely) and the cabinet. it’s IMPERATIVE that any spacers be replaced exactly as initially installed otherwise future alignment operations may be compromised. if there aren’t any shims, then just proceed cautiously. the ‘70s vintage unisaw i refurbished didn’t have any shims, and it presented a bit of a challenge getting things realigned when reinstalling the top. then remove the belts. this video covers how to put them on sequentially. just reverse the process:

the intermittent rattling noise sounds a bit like the noise made by the defective arbor bearings in my 70s unisaw. replacement of the bearings is the only remedy. if the noise is coming from the motor, it’s usually the bearings.

one of the (what appears to be) capacitors seems to be a bit close to the opening in the cabinet for the motor. those motors have quite a bit of torque, so it may be moving at start up. start the saw and see if the motor is jumping, causing that capacitor housing to hit the cabinet.

the link above is part of a series of videos dealing with older uisaws, but a lot of the techniques may be helpful to you. some things changed slightly over the years , so proceed cautiously. you may want to contact these guys, who seemed to know unisaws quite thoroughly:

-- there's a solution to every just have to be willing to find it.

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