burl1984
ArboristSite Lurker
I did a ton of searching for a new clutch drum bearing for the saw that I'm building. After hours of searching threads I came up with this idea not sure if someone has already posted this somewhere but i couldn't find it so here it is.
HVP 503 13 29 01.
Basically I toasted the bearing on the clutch hub because the crank that I was sold was a right hand thread crank p/n 69346. All my other saws have had a left hand crank thread feature and I wasnt aware that there was a left hand thread 101b crank option at the time that I first put the crank in the engine I found. Needless to say on the first start up I spun off the clutch at a rather high rpm. The chain did however remain in the 9 pin rim drive but it was riding on the bearing itself and basically ruined it. I have recently replaced the crank with a p/n 90872 "left hand thread 101b crank".
I couldn't find a listing that showed direct application replacements from oregon for the SP 125 C drum bearings so I searched for 9/16" chainsaw drum bearings and a 2100/3120 husqvarna came up on the google list. I just happen to have 1989 vintage 3120 that is in good running condition so I took the clutch drum bearing out of the 3120 and slid it nicely onto the 101b crankshaft and put the SP 125 C drum over it. It fits nicely!
HVP is 19.00 from baileys. This may be a cheaper option http://www.baileysonline.com/Chains...Bearings/Drive-Sprocket-Bearing-ORF 21276.axd
It's the oregon brand of bearing for the 3120 but only costs 8.00.
IMO the OEM HVP is much higher quality and resembles the OEM McCulloch 125 p/n more so than does the Oregon bearing.
I hope this helps anyone in need of a replacement McCulloch drum bearing that hasn't been able to source an OEM one.
HVP 503 13 29 01.
Basically I toasted the bearing on the clutch hub because the crank that I was sold was a right hand thread crank p/n 69346. All my other saws have had a left hand crank thread feature and I wasnt aware that there was a left hand thread 101b crank option at the time that I first put the crank in the engine I found. Needless to say on the first start up I spun off the clutch at a rather high rpm. The chain did however remain in the 9 pin rim drive but it was riding on the bearing itself and basically ruined it. I have recently replaced the crank with a p/n 90872 "left hand thread 101b crank".
I couldn't find a listing that showed direct application replacements from oregon for the SP 125 C drum bearings so I searched for 9/16" chainsaw drum bearings and a 2100/3120 husqvarna came up on the google list. I just happen to have 1989 vintage 3120 that is in good running condition so I took the clutch drum bearing out of the 3120 and slid it nicely onto the 101b crankshaft and put the SP 125 C drum over it. It fits nicely!
HVP is 19.00 from baileys. This may be a cheaper option http://www.baileysonline.com/Chains...Bearings/Drive-Sprocket-Bearing-ORF 21276.axd
It's the oregon brand of bearing for the 3120 but only costs 8.00.
IMO the OEM HVP is much higher quality and resembles the OEM McCulloch 125 p/n more so than does the Oregon bearing.
I hope this helps anyone in need of a replacement McCulloch drum bearing that hasn't been able to source an OEM one.