Haleysdream
has rocks in the head
K-9 unit Rock Hounds
Member since January 2010
Posts: 654
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Post by Haleysdream on Mar 24, 2010 7:37:39 GMT -5
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Post by johnjsgems on Mar 24, 2010 8:51:29 GMT -5
Looks like you will have to start from left side. Get some "Liquid Wrench"or other penetrating oil from hardware/auto parts. The black ring on bearing is a lock collar that holds bearing in place on shaft. There are generally two types. One is attached to bearing and has one or two allen head set screws. Remove the set screws and pour the penetrating oil in the holes. Clean any exposed shaft surface with sandpaper and file any dings until shaft is smooth. Unbolt bearing assy. and drive off or pry off. The other type of lock collar is a "concentric collar. It locks on the bearing race to center bearing. It will usually have one set screw and one empty hole. Remove the set screw, oil as before. Take a punch or large screw driver and place it on edge of empty hole on collar. Tap in opposite direction of rotation. Collar should come off fairly easily. The bearing is removed as described below. It sometimes helps to heat it with a torch but this can get dangerous. I've also cut the whole bearing off with a Sawzall. Make sure you can find replacement bearings before. Good luck.
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Haleysdream
has rocks in the head
K-9 unit Rock Hounds
Member since January 2010
Posts: 654
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Post by Haleysdream on Mar 24, 2010 9:31:37 GMT -5
Thanks John ok I'll try that but once I get the shaft off how do the grinding wheels come off ? & then reattach the new ones.??
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Post by Hard Rock Cafe on Mar 24, 2010 12:26:41 GMT -5
Hi Nancy,
Your pics are a little small for me to tell for sure, but if your grinder is like mine, there are spacers on the shaft between the wheel flanges. taking the collars off of the ends will allow the spacers, flanges, and wheels to "slide" off. I put "slide" in quotes because mine needed some encouragement after being on there for years and getting cemented on with rock snot.
I put a large crescent wrench against the wheels (with the jaws on either side of the shaft) and hit the wrench, rather than the wheels. As John said, a penetrating oil will help and you may need to let is soak a while.
If the sockets on the set screws are stripped, you can sometimes use an allen head wrench that is just slightly larger and tap it in with a hammer. As a last resort, you can drill them out, but you'll likely have to re-tap the threads when you're done..
Hope this helps, Chuck
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Post by johnjsgems on Mar 24, 2010 12:45:59 GMT -5
The split drum likely has a set screw. The shaft should have a nut on each end (left side will be left hand thread). Once you get the bearings off the wheels will slide as Chuck said.
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drjo
fully equipped rock polisher
Honduran Opal & DIY Nut
Member since May 2008
Posts: 1,581
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Post by drjo on Mar 24, 2010 16:05:57 GMT -5
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WarrenA
fully equipped rock polisher
Member since November 2003
Posts: 1,530
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Post by WarrenA on Mar 24, 2010 23:26:52 GMT -5
also take a small punch that fits into the set screw and give it a couple of "love taps" and the screws might loosen up. spray the penetrating oil and tap the parts to vibrate and let set for awhile. you might have to spray and tap for a couple of days before the oil gets the job done.
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Post by Rockoonz on Mar 25, 2010 1:52:55 GMT -5
For penetrating oils Aero Kroil or PB Blaster are best. Forget WD40, WD stands for water displacing, which it does quite well. As a penetrating oil it's worthless.
Lee
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Haleysdream
has rocks in the head
K-9 unit Rock Hounds
Member since January 2010
Posts: 654
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Post by Haleysdream on Mar 25, 2010 9:45:16 GMT -5
All this will help alot , I plan on tackling it again this weekend. Any more suggestions are welcome. Thanks, Nancy
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Post by catmandewe on Mar 25, 2010 9:56:44 GMT -5
Put some PB blaster on it now so it will have time to soak in by this weekend. I have had some take several weeks before they will break free.
Good luck with it..................Tony
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Haleysdream
has rocks in the head
K-9 unit Rock Hounds
Member since January 2010
Posts: 654
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Post by Haleysdream on Mar 28, 2010 10:28:20 GMT -5
Got some PB Blaster, sprayed it on , left for a day & on Saturday got every thing apart ! It was still a struggle but at least things moved. Now I am waiting for the new wheels & belt sanders , hopefully I will remember how to put it all back together . Thank you all !~Nancy
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
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Post by quartz on Apr 2, 2010 13:17:00 GMT -5
Anti-sieze compound applied to shaft areas that are sleeved and to all screw threads will make the next teardown a lot easier, a little of it goes a long way. Available at good hardware stores and industrial supply places.
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Post by rocklicker on Apr 2, 2010 15:31:39 GMT -5
Glad things are moving...literally! Hope you get the new wheels on a lot easier than it was o get the old ones off! Steve
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