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Only a fool lends a tool. That isn't my mantra now but it was an hour ago when I discovered my tried and true 25 year old (guessing) Ariens had suffered a sheer pin failure. May I say at this point my 724 was in the capable, if not owner-careful, hands of a tenant/friend for the last 3 weeks. Judging from amount of dirt and lawn I removed from rakes, housing, augur and chute I would say this machine was in a life or death struggle a week ago. It could happen to any one. Something jammed the rake; the sheer bolt failed and, during the trauma the right hand rake (from operator perspective) has become rigidly locked with neither failed bolt nor hole through shaft visible through the rake bolt hole. The rake is attached to the drive shaft about 30 degrees out of sequence with the left rake and the effect that might impart to function I've yet to see but something tells me it won't be an improvement.

I've seen some threads suggesting ways to free the rake so that a 'normal' hole alignment and sheer bolt replacement might occur. My only concern, other than the forecast foot of snow tomorrow, is the risk of damaging the rake's differential (pardon me if I have incorrectly identified.)
i will generously lubricate the right shaft and enter battle. I will be looking for a pile of snow to thrust the SB into whilst engine running. I hope to free the rake from its death grip upon the shaft by applying that resistant yet yielding pressure. Short of removing augur, driveshaft, differential(?) and rakes from housing to bench work it I prefer to hope and pray for a remedy by use. Suggestions, good cheer and epiphany gladly accepted.

hello, new to forum, just call me a Rookie4now. For your part, pray my problem is solved and I have no others or there might be more long winded previously dealt with issues posted by yours truly.
 

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:welcome: to SBF rookie4now

My guess would be if the rake won't line up with the shaft's hole it's because the bolt sheared and it's still in the shaft. If you haven't removed the shear bolts periodically and lubed them they can rust in place. Might be the bolt head and tail sheared off but the body is still in there and that's what is causing the rake to feel jammed.
You would need to rotate that rake until you can line it up with the bolt hole.

.
 

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Only a fool lends a tool. That isn't my mantra now but it was an hour ago when I discovered my tried and true 25 year old (guessing) Ariens had suffered a sheer pin failure. May I say at this point my 724 was in the capable, if not owner-careful, hands of a tenant/friend for the last 3 weeks. Judging from amount of dirt and lawn I removed from rakes, housing, augur and chute I would say this machine was in a life or death struggle a week ago. It could happen to any one. Something jammed the rake; the sheer bolt failed and, during the trauma the right hand rake (from operator perspective) has become rigidly locked with neither failed bolt nor hole through shaft visible through the rake bolt hole. The rake is attached to the drive shaft about 30 degrees out of sequence with the left rake and the effect that might impart to function I've yet to see but something tells me it won't be an improvement.

I've seen some threads suggesting ways to free the rake so that a 'normal' hole alignment and sheer bolt replacement might occur. My only concern, other than the forecast foot of snow tomorrow, is the risk of damaging the rake's differential (pardon me if I have incorrectly identified.)
i will generously lubricate the right shaft and enter battle. I will be looking for a pile of snow to thrust the SB into whilst engine running. I hope to free the rake from its death grip upon the shaft by applying that resistant yet yielding pressure. Short of removing augur, driveshaft, differential(?) and rakes from housing to bench work it I prefer to hope and pray for a remedy by use. Suggestions, good cheer and epiphany gladly accepted.

hello, new to forum, just call me a Rookie4now. For your part, pray my problem is solved and I have no others or there might be more long winded previously dealt with issues posted by yours truly.

I had a similar thing happen to me when I did a neighbor’s pea stone driveway. What happened to me most likely happened to your machine. The augers picked up the stones and they got wedged between the augers and the metal housing. In my case, that caused substantial damage so if you only lost shear pins, consider yourself lucky
 
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