Stihl 044 Crankcase bearings.

[scallywag]

Here we have two NOS 10mm OEM Stihl 044 crankcases with factory fitted case bearings, one is a very early version with the angled impulse fitting, the other case has the straight impulse fitting, apart from that they're the same case.....My question is in regard to the shielded bearings used in the later crankcase, surely a non shielded bearing would be more suitable in a two stroke engine?

 

[pioneerguy600]

Stihl did that for a period in time but they did not work out well , the idea was to keep fines that was getting through the airfilters out of the bearings. I run them in two of my own saws with no problems to date but others found the bearings did not last. They do get oil past the shield so they should last but for some reason they had lots of failures and stopped using them.

 

[scallywag]

Stihl did that for a period in time but they did not work out well , the idea was to keep fines that was getting through the airfilters out of the bearings. I run them in two of my own saws with no problems to date but others found the bearings did not last. They do get oil past the shield so they should last but for some reason they had lots of failures and stopped using them.

Thanks for the info!.....Think I'll be replacing them before they become a problem.

 

[pioneerguy600]

Thanks for the info!.....Think I'll be replacing them before they become a problem.

Pull the shields off, there is nothing wrong with the bearing itself.

 

[gary courtney]

I have 2 -10mm's that I am restoring 100% oem including complete powder coating and both had bottom end failures and both were running shielded bearings. The top end was in excellent shape.

 

[huskihl]

My experience with Stihl shielded bearings has been the opposite of most.

I picked up 9 044 carcasses a couple years ago all in various states of disrepair. Came from a logging outfit. All were missing the top handles, most were missing recoils and clutch covers, some were driven over or had a log roll on them. Some had scoring inside for whatever reason. But they all had the shielded bearings and all were good still. I’ve seen 066’s with thousands of hours on them with those bearings in them that were still good. Not sure if it’s the quality of parts back then or if the shields actually kept the debris out.

 

[scallywag]

Shields removed to reveal factory grease.....Would make for plenty of smoke on initial start up!

 

[scallywag]

Anyone know if the 044 pto side bearing (9523 003 4270) has been superseded?

 

[DND 9000]

9523 003 4275 is the current no.

 

[scallywag]

9523 003 4275 is the current no.

Thanks, I'll give that number a try.

 

[scallywag]

9523 003 4275 is the current no.

Stihl dealer now saying 9523 003 4275 has been superseded to 9523 003 4278 ?