Bearing removal and replacement on hover 450

[steveb]

New member trying to refurbish the bearings on a Hover 450 form the late 30s. Found an on line manual from 1957 that covers pretty much all models up to then, but does not get into disassembly details on the motors with bearings. Trying to remove the drive pulley from the shaft, it appears in the manual to be left hand threaded, but there is no good way I can see to lock the shaft while trying to unscrew it. I can't hold the impeller while turning the pulley since the impeller is not apparently locked to the shaft in any way, it is just friction fit with everything tightened down.

There is a small hole in the bottom that appears to have some slotted screw at the bottom when I put a small screwdriver down there. It does not move after using penetrating oil on it. was hoping this might be holding the pulley on though it does not appear in the parts diagrams.

Next step seem to be a heating up the pulley with a torch and seeing if that frees it up.

Thoughts?

Steve

 

[lesinutah]

Help

I have three different colors on the pic. Blue is the fan shaft belt pulley. Green is the fan. Red is the bearing rivets.
The blue section I believe is seperate from the fan. It would be like a royal, Kirby and eureka. Spin the pulley counter clockwise. The fan should not spin. You may be able to spin the pulley off by holding the fan still. If it doesn't the rear opening hold armature still and the pulley should thread off.
The fan will come off after the bet shaft is removed.
Here is the issue it's the rivets. There is a plate riveted where I marked red.
Ideally you access the bearing clean it out and repack the bearings. You will be hard pressed to find a bearing plate with bearings in it.
If you clean and pack the bearings do so.
I found a bearing plate with bearings. You have to drill out the rivets. The plate would be installed with small screws where the rivets were.
Les

 

[bikerray]

When you look at the top of the fan pulley you will see a slot in the armature shaft. Put a screwdriver in the slot to hold the armature then unscrew the pulley while holding the armature with the screwdriver.

 

[steveb]

Thanks, got it apart, now what grease to use?

The slot was the trick to get the pulley off the bottom and I removed the rivets to access the bearing guts. The clearances are just fine and the parts are OK, but I have never seen such a mess of clogged up grease that did not trash some parts.

I assume regular wheel bearing grease will do, or is there something better? The manual advocates their "soft" grease to keep it from migrating down on to the motor parts. Nothing seems to translate soft into some standard...

Steve

 

[lesinutah]

Dang

Very well done with the safe removal.
I use Lucas oil grease but as long as you lube it with new grease the type isn't much difference.
You even took apart the bearing. I think your more mechanically inclined than you give yourself credit for. I used a grinder to take my rivets off. It ignited the grease and I burnt the bearings. I was smart enough to smother the fire as water wouldn't do anything.
Les

 

[bikerray]

I use Lubriko M6 grease, it's made by Acrotech Industries, Inc. In Milwaukee, WI.

I got 1 lb. container at the place where I buy my replacement bearings, generally companies that sell bearings can recommend a grease.

Most of the time I will flush out the old grease and then put new grease in unless the bearing is at the point it's damaged, then I'll replace the bearing.

 

[lesinutah]

I

Use Lucas oil white lithium grease. Its sold at auto parts store and Walmart.
I prefer Lucas oil and have used it 20plus years.

 

[steveb]

Done.

Used the lithium grease and replaced the brushes while it was apart. Runs great, no bearing noise at all. Thanks to all for the help!