Timberwolf bearings

[John Shutler]

THe firs time time I replaced the bearings on my old Timberwolf 150 they lasted about 50 hours,I hadn’t balanced the fly wheel correctly. The second time I did it I had more of an idea what I was doing (thanks to dean) and it’s probably still going well now 

[aspenarb]

What kills most bearing replacements on the small timberwolfs is the unwitting  axial loading of the bearings, the small bearing at the rollerbox end with the shims/nut gets mullered when running if the big bearing in the engine compartment was pulled up the shaft using the bolts, the rotor housing acts like a huge spring applying a constant axial load.That big bearing/housing in the engine bay needs gently tapping towards the rotor box so it just touches and then bolt it up, I use threaded bar as studs as a locator and then swap over to the bolts.Also worth remembering if you are going non timberwolf on the bearings that you need deep groove bearings, bearing shops will sell you the cheapest alternative that fits and they wont last.

 

Bob 

Edited December 27, 2021 by aspenarb
because Bob has a hangover

[Dean Lofthouse]

1 hour ago, aspenarb said:

What kills most bearing replacements on the small timberwolfs is the unwitting  axial loading of the bearings, ..............., the rotor housing acts like a huge spring applying a constant axial load.

 

Bob 

Spot on 👍