Delta 34-670 motor pulley removal
DL34_670
| Posted in Power Tools and Machinery on
Anyone ever remove the pulley from an old Delta 34-670 table saw motor. I have not figured it out yet. Need to pull to refurb & clean bearings (get into housing). The pulley has no set screw. Looking down into the gap (~1/16 inch) between pulley and housing, it appears the shaft is threaded…..if that’s any clue. pictures attached. If no clues, any suggestions on who may know?
Replies
Perhaps there is some info here.
http://vintagemachinery.org/pubs/detail.aspx?id=18303
Thanks, dated 1986, and still shows the retaining ring used on shaft end. I'm thinking the retaining ring rusted and fell off decades ago, and the pulley is simply fused (rusted) to the shaft.
I'm not familiar with it specifically, but with a big flat on the shaft, I don't see how it can be threaded. Could there be a set screw access hole somewhere among/between the cogs?
Typically, one would use a puller for that, but there doesn't appear to be much room between the cog and housing for one to grab onto. You might take it to a motor shop and ask if they can take it off.
The flat section of the shaft suggests there is a set screw some place. Clean off the gear and pully well so you may see how it is held together. Try some penetrating fluid where the gear and shaft meet and let it sit for a couple of days in a position that allows the penetrating fluid to seep down the shaft. After that use a propane torch on the gear, not the shaft, to expand it to see if you can get it off. Propane will get hot but not hot enough to melt anything.
First take off the belt. Next spray the shaft with a penetrating oil. Do not try to pull the pulley without oil, it cracks easily and then you will be stuck. After the oil has been on for a couple hours get a bearing puller and gently pull the pulley straight out toward you. I cannot stress enough this point. You need to apply pressure on the back of that pulley equally so the back doesn’t crack. There is nothing holding it on per se, it is just that tight. And here is the fun part, after you get that off you need to remove a threaded nut. But it is incredibly hard to get to. It has 4 small rectangular cut outs on it at North South East and West positions(and it is under the pulley). You need to remove that threaded nut by twisting it left. Once you have the pulley and the threaded nut off, then remove the 4 screws that are clearly seen in the middle section of the motor. Once you do that, the motor will come apart and you can get to the armature and the bearings. It’s a real PITA as far as table saw motors go. The 34-670 36-600 and TS300 all have this motor and it’s the worst table saw motor I have ever worked on hands down.