I was trying to clean and lubricate the speed control of my (new to me) Mark V 500 and as I was cranking the speed up it popped and rattled quite a bit.
I’m pretty sure the circled part in this photo should be pushed toward the right and into the shaft there. Did I break it? Do I need to replace it? If so, what is the part called so I can order it? If I can fix it, what do you recommend as to how to get it back in there?
IMG_7604.jpeg (209.19 KiB) Viewed 5484 times
Also, when do you know if you need to replace the belts? I’m not sure how old these are. They seem in good shape but very stiff. I’m in AZ so rubber belts (and windshield wipers) dry out quickly.
You might be able to get it back in place if the bearing is still good. There is a seller on eBay that sells a replacement bearing if your bearing is dry. Please note that replacing this bearing often cracks the sheave housing.
More important is the cause. I suspect inadequate lubrication(oil) on the floating sheave(motor shaft). That loop should not be 'pulling' on the bearing.(assuming only changing speed control while pulleys rotating)
Belt dressing/conditioner will help dried, stiff rubber belts.
Is it possible you were cranking up the speed with the pulleys NOT rotating?
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
I recently ran across this problem when giving a later Model A-34 Jig Saw a thorough overhaul. The Upper Chuck Assembly was previously trapped within the Spring Cylinder Assembly, but it is now free to spin.
These are two different problems. The OP has a problem inside the Headstock of a Mark V whereas you are describing a problem with the Upper Chuck of an A 34 Jig Saw for a Model 10E and 10ER being stuck. Something I have had the displeasure of having to deal with in one of my restorations.
Russ
Mark V completely upgraded to Mark 7
Mark V 520
All SPT's & 2 Power Stations
Model 10ER S/N R64000 first one I restored on bench w/ metal ends & retractable casters.
Has Speed Changer, 4E Jointer, Jig Saw with lamp, a complete set of original accessories & much more.
Model 10E's S/N's 1076 & 1077 oldest ones I have restored. Mark 2 S/N 85959 restored. Others to be restored.
