Ms362cm needles bearing issues

[fastwood]

Anyone else have trouble keeping needle bearings in there mtronic 362.I cut mostly hardwood with mine an go through needle bearings every week seems like every 10 to 15 cord I'm replacing them an every 20 cord putting in a new drum seems like a lot to me

 

[Mad Professor]

Anyone else have trouble keeping needle bearings in there mtronic 362.I cut mostly hardwood with mine an go through needle bearings every week seems like every 10 to 15 cord I'm replacing them an every 20 cord putting in a new drum seems like a lot to me

Those should last many cords or years.

They only spin when the clutch is not engaged.

 

[ballisticdoughnut]

What’s happening to the bearing exactly? Cage melting or breaking? You seeing any signs of excessive heat? Discoloration on the drum?

 

[ericm979]

Are there any damaged spots on the crank where the bearing runs, or inside the clutch drum?
Are you keeping it clean and lubing it with a tiny bit of grease when you clean it?

 

[fastwood]

Those should last many cords or years.

They only spin when the clutch is not engaged.

That's what I thought to but it seems like the clutch side of the bearing wears into the clutch it's self an is constantly spinning

 

[Vintage Engine Repairs]

That's what I thought to but it seems like the clutch side of the bearing wears into the clutch it's self an is constantly spinning

Are you using genuine stihl bearings and clutch drums ?

 

[Mad Professor]

Reving it with the chain brake on?

 

[fastwood]

Are you using genuine stihl bearings and clutch drums ?

I am when I bought it from a buddy it had addefol drum an metal bearing in it that seemed to last the longest

 

[fastwood]

Reving it with the chain brake I'm not an I hope my helper isn't either its mostly a pile saw an does get hot from time to time an have seen discoloration on the drums I do use a bit of grease when cleaning an servicing the bearing

 

[Vintage Engine Repairs]

It can only really be a bent or otherwise damaged crank, inspect it closely and check if it’s out of round. Edit; or maybe a damaged clutch..

 

[singinwoodwackr]

If the drum and clutch are blueing then someone is reving it with the brake on. Or, if the chain spins at idle the clutch springs are shot.

 

[SteveSr]

Once again, lots of speculation with little real information to go on...



I'll add... Chain being tightened too tight?

 

[fastwood]

Well vintage was the winner it seems the crank has been over heated so bad it has wire a groove right in front of the clutch

 

[Mad Professor]

Well vintage was the winner it seems the crank has been over heated so bad it has wire a groove right in front of the clutch

How did the overheat happen?

I've seen 026 plastic clutch covers start to melt from debris that were never cleaned from the clutch/housing..........

 

[fastwood]

I'm guessing the oiler broke on the original owner an he just kept running it or he was reving it with the brake on either way I'd say that's why I picked it up for 350$

 

[Vintage Engine Repairs]

Well vintage was the winner it seems the crank has been over heated so bad it has wire a groove right in front of the clutch

 

[singinwoodwackr]

Well vintage was the winner it seems the crank has been over heated so bad it has wire a groove right in front of the clutch

Worn a groove? Pics? The only way to do that is metal on metal and don't see how that's possible without something broken behind the clutch of similar grade of steel as the crank.

Need pics

 

[ericm979]

If the bearing cage breaks up the rollers can jam between the crank and clutch.

 

[singinwoodwackr]

If the bearing cage breaks up the rollers can jam between the crank and clutch.

Seen that...usually destroys the clutch and oil pump

 

[SteveSr]

I'm guessing the oiler broke on the original owner an he just kept running it or he was reving it with the brake on either way I'd say that's why I picked it up for 350$

Unfortunately, that wasn't a deal. Fixing it properly is not cheap in parts and expensive in labor. You have to tear the saw completely apart and replace the crankshaft and connecting rod. For a dealer this is not an economically viable repair. THe saw becones a parts donor.

Others can fill in but there was a rash of MS260? MS261s? that had this same issue. Stihl never admitted anything but there was speculation that these crank shafts somehow escaped the heat treating / hardening part of the manufacturing process.

In any case that is ALWAYS an area to check on a used saw to make sure the crankshaft stub is good and not galled/worn. Live and learn.