LumberJocks

Replaced arbor bearings something still wrong.

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by skatefriday posted 06-03-2015 04:12 AM 1356 views 0 times favorited 31 replies Add to Favorites Watch
View skatefriday's profile

skatefriday

380 posts in 948 days


06-03-2015 04:12 AM

So I replaced the arbor bearings on my one year old Grizzly G1023 and
fired it up and there’s still a rather loud knocking. Put brand new Nachi
bearings in.

https://www.youtube.com/watch?v=MSF6CUHGKRE&feature=youtu.be

The lower pulley is knocking.

https://www.youtube.com/watch?v=Lv0aT868nPc&feature=youtu.be

Put a hex wrench in there and the set screw was loose. I spent the next
HOUR trying to get it out. It’s all the way loose but I can’t get it to emerge
far from the hole to get a handle on it. I thought about turning the motor
on to eject but common sense then took hold.

I know there’s a second screw in that hold and I’d like to see if that’s loose
also. Am I going to have to take the motor off?

FWIW, the bearings that came off were C&U. $1.00 each in quantities of 100
from a seller on Alibaba.

What those bearings were doing yesterday before I pulled them off the arbor.

https://www.youtube.com/watch?v=beaWM-fVeII

Any tips on getting those set screws out?

Thanks.


31 replies so far

View skatefriday's profile

skatefriday

380 posts in 948 days


#1 posted 06-03-2015 04:17 AM

And/or any tips on what is still wrong with the machine?

View MrUnix's profile (online now)

MrUnix

4234 posts in 1665 days


#2 posted 06-03-2015 05:19 AM

Typically, the set screw should hold pretty tight on the hex wrench and you can just pull it out once loose. Maybe there is some gunk in the hole hanging it up that can be cleaned out with a small bottle brush or compressed air. You could also try turning the pulley so the set screw is facing downward and trying it that way… or maybe a small magnetic tipped screwdriver can extract it. Are you sure there are two set screws in the hole? I know there should be two set screws on the pulley, but each one in a different hole.

Once you get it sorted out and re-install the set screws… put a dab of blue locktite on them to keep them from backing out in the future.

I’m curious though as to why the loose pulley shows up now when it apparently wasn’t loose when you first started messing with the machine… didn’t you have a video where you just ran the motor and it sounded fine?

Cheers,
Brad

PS: with the set screws loose (but still in the pulley), you should be able to pull the pulley off the motor shaft… no need to remove the motor (but you do need to remove the belts). Keep in mind though, the pulley should be installed in a set position on the motor shaft, so you will most likely need to readjust it’s position. Make sure it lines up with the arbor pulley.

-- Brad in FL - To be old and wise, you must first be young and stupid

View Slemi's profile

Slemi

103 posts in 1007 days


#3 posted 06-03-2015 09:09 AM

I wrote on the youtube earlier. The back noise is probably the fan scratching on the fan cover.

View KellyB's profile

KellyB

77 posts in 648 days


#4 posted 06-03-2015 01:45 PM

If your saw has the serpentine belt, there are four set screws holding the motor pulley on the shaft.
If you go to Grizzly and look at the parts diagrams there for the new one, you will see that there are indeed two
holes in the pulley, and two screws in each, one behind the other, as a “lock nut” sort of.
https://d27ewrs9ow50op.cloudfront.net/partslists/g1023rl_pl.pdf

So be sure you deal with all four to get the pulley tight.

I have had my 1023RL for about a month and used it but little, so I will be watching for this.
So far, so good, and I’m really pleased with the saw.

View skatefriday's profile

skatefriday

380 posts in 948 days


#5 posted 06-03-2015 02:45 PM

MrUnix, yes I know there are, or should be, two in each hole because
I put them there after Grizzly shipped me a machine without them. The
factory had “forgotten” to install them.

Slemi, earlier I had the fan cover off and it was making the same noise.

I suppose I will be going out and trying to find a magnetic screwdriver
that will pull those set screws out.

View WhyMe's profile

WhyMe

615 posts in 1027 days


#6 posted 06-03-2015 02:55 PM

There are only a few moving parts. Have you checked the motor shaft for excessive run out or slop in the motor bearings? This is painful not seeing you find the problem. Hope it’s just the loose pulley.

View skatefriday's profile

skatefriday

380 posts in 948 days


#7 posted 06-03-2015 05:31 PM

Still trying to get that first set screw out and it just refuses. And I need to get it
out to check whether the bottom one is tight. I think I’m going to have no
choice but to remove the motor. Sigh…

View Shadowrider's profile

Shadowrider

183 posts in 675 days


#8 posted 06-03-2015 06:30 PM

When you get it all fixed up, make sure the threads for the set screws are clean and dry. Use BLUE loctite on all the set screws when you get the pulley reset. Let it dry before running it.

View Yonak's profile

Yonak

979 posts in 987 days


#9 posted 06-03-2015 08:28 PM

Use BLUE loctite on all the set screws when you get the pulley reset.

I would discourage this. It could be why you’re having such a hard time getting it out now .. because Loctite was used when it was tightened. I believe the best way to lock the set screw in place is another one on top.

View JoeinGa's profile

JoeinGa

7483 posts in 1473 days


#10 posted 06-03-2015 08:36 PM

try unscrewing it some more. I’ve had setscrews in pulleys that even though you couldn’t SEE it, the threads were all the way out to the outer edge of the pulley. Keep unscrewing it and it SHOULD finally come out.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View gfadvm's profile

gfadvm

14940 posts in 2156 days


#11 posted 06-04-2015 01:08 AM

I’m with Joe: it SHOULD screw out (unless the threads don’t go all the way to the surface, which would be weird).

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View MrUnix's profile (online now)

MrUnix

4234 posts in 1665 days


#12 posted 06-04-2015 01:21 AM

I m with Joe: it SHOULD screw out (unless the threads don t go all the way to the surface, which would be weird).

If it’s anything like the pulley on the Unisaw, they don’t… the first 1/4” or so is over-bored and the threads don’t start until well down into the hole.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View skatefriday's profile

skatefriday

380 posts in 948 days


#13 posted 06-04-2015 01:32 AM

Finally got that setscrew out but I did need to take the
motor off. That thing is HEAVY.

Even with the motor off, I could only get the setscrew to
come to the edge of the pulley and then it would catch on
something. Eventually, after a lot of cursing I got some
surgical needle nose pliers to grab it and was able to pry it
past the obstruction.

And sure enough, the bottom setscrews in both sides of
the pulley were loose.

Tightened them up, put the thing back together and it
appears to work. There’s a slight resonance but I can’t
really tell until I get it all buttoned up and put a blade on
it as that’s what normal sounds like to me. e.g. I can’t
really tell what abnormal is with the top off and no blade
on it (well I could tell what that racket was in the videos I
posted).

View gfadvm's profile

gfadvm

14940 posts in 2156 days


#14 posted 06-04-2015 01:35 AM


I m with Joe: it SHOULD screw out (unless the threads don t go all the way to the surface, which would be weird).

If it s anything like the pulley on the Unisaw, they don t… the first 1/4” or so is over-bored and the threads don t start until well down into the hole.

I have encountered those and they can be exasperating when they have some sawdust/grease/grunge in them!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View skatefriday's profile

skatefriday

380 posts in 948 days


#15 posted 06-04-2015 05:06 AM


I m with Joe: it SHOULD screw out (unless the threads don t go all the way to the surface, which would be weird).

If it s anything like the pulley on the Unisaw, they don t… the first 1/4” or so is over-bored and the threads don t start until well down into the hole.

I have encountered those and they can be exasperating when they have some sawdust/grease/grunge in them!

- gfadvm

Yes.

And thanks for pointing that out. Why don’t the threads extend at least
far enough out so that a portion of the body of the screw will extend past
the edge of the pulley? For the screw to be fully recessed at the end
of the threads caused me a day of exasperation and the help of a neighbor
to reinstall the motor as that piece of crap wasn’t coming out without
making the pulley horizontal.

And there was no way to seat the inner screw without removing fully
the outer screw.

This is a really poor design choice.

But I get a vet commenting in a thread where I used a hemostat to
extract the screw. I like the symmetry there. :-)

showing 1 through 15 of 31 replies

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com