How to remove Norton 6x18 surface grinder spindle for repair?

I'm trying to remove the spindle on my Norton 6x18 surface grinder to replace the bearings. Its the ball bearing spindle with the integral motor. I started to take it apart and found out I was actually taking the whole cartridge apart. I want to slide the whole cartridge out and disassemble it on a workbench. I've been playing around with it, and aside from the two setscrews I cant see anything else holding it in, and I cannot for the life of me figure out how the damn thing comes out. It wont budge when I try to remove it, and there seems to be nothing holding the motor or anything else on, except for the set screws mentioned previously. Has anyone ever pulled one of these before, or know how its done? I will try to get more pictures tonight.

I was looking to see if there were any images and ran across this.
NORTON 6x18 Older Surface Grinder Parts Manual | Ozark Tool Manuals & Books

From the index it looks like the manual may be of some help as it mentions replacing the spindle.

I do not know if a manual is posted online.

Edit it is on line - but does not actually talk about taking spindle apart, only removing it.
http://chasgallen.com/wp-content/uploads/2010/07/6X18-Hydraulic-Parts-and-Operators-Manual1.pdf

Hi,

This machine is older than mine, but on mine I did the following:

Raise the drive motor to loosen the drive belt.

On the underside of the spindle there is a set screw - loosen it all the way.

Pull the spindle out the back (drive pulley side), and you're done.

On my machine the motor ran the cartridge through a flat belt.

On mine the place where the set screw hit the spindle cartridge there was a flat.
If there is no flat on yours, the set screw may have raised a burr, so it may
require some gentle persuasion. You could use a modified wheel puller to get it
out. I had no trouble getting mine out. I just pulled mine out by hand.

I would inspect to see if there were other retainers, other than the set screws,
before I get physical. I would not remove the cartridge if the bearings don't
need replacement.

If the bearings need replacement - the best way is to use hot and cold to expand
and shrink the opposing parts into place. When you get the bearings in place
correctly, run them in for an hour or two, and re-tighten all the nuts. But on
your machine this may be hard to do if the motor and cartridge are on the same
shaft. If they are on the same shaft, I would have the bearings replaced by
a professional who had all the proper equipment to do the job.

You need to know which way the bearings go in relative to each other in
order to obtain the proper pre-load. If you do it wrong you will ruin
your $700 worth of bearings. You also have to know which pre-load to
order the bearings with. The bearing are made as matched sets with the
spacing between the bearings determining the amount of pre-load. You
tighten the retaining nuts to the point where the two bearing races
touch, thus giving the proper pre-load.

You will need a special grease to pack your bearings with. You will
need to know how to pack the bearings. I would find out what grease
and what method of packing the bearing manufacturer recommends, for
your grinder application. Packing is not a no-brainer, like packing
a car's wheel bearing. To much grease and the bearing will overheat,
and to little and the bearing will run dry, and gall the race.

Good Luck,

Paul Hoffman

I have what appears to be an original proper manual for your machine for sale.

The manual says merely to remove the spindle intact and send it to the manufacturer for repair, and not to disassemble the spindle. A later model grinder manual specifically states the spindle is retained by two set screws that bear on flats on the spindle housing and to remove the spindle from the rear.

The spindle has flats for the set screws, the motor is integral to the cartridge/spindle, something is making a bad bearing noise. I started to take apart the cartridge by accident and the bearings look fine, I'm pretty sure its the bearings in the motor. I have checked everything and see nothing else holding it in, I can get the spindle to move, but not the whole cartridge.