McKee snow blower sheer pin question

[bx24]

I got a great deal on this blower, and I am finally getting around to getting it ready for work. I thought I would see if you folks had any suggestions for my concerns ...

I see how the auger drive is set up with a sheer bolt, but I don't see how the fan is protected. Does the fan need one? Given that the power shaft right now is a smooth bore 1" drive w/key, I was hoping to simply buy the appropriate yolk ...

I have done a little searching for manuals online, but nothing yet.

 

[studor]

I don't have a McKee but on my blower the drive shaft yoke has a sheer bolt connection to protect the blower and the gearing. It looks like your blower should have the same set up. You will need that protection -- I have snapped the driveline shear bolt many times versus almost never for the auger. It is very possible for the auger to move stuff it to the fan that will jam it while the auger is still free to move.
Just about forgot -- I would also put a guard over the chain sprocket at the back to stop things from getting into the works and replace the cover over the gearing on the front for similar reasons (and a little more safety)
regards
Steve

 

[bx24]

Studor-

All of the guards are off right now to clean things up ... they will all be going back on .... thanks

Do you by chance have a picture of the way your main drive line is set up? I was trying to figure out how I might do it

 

[Willl]

Could you get a slip clutch to fit that shaft ?

 

[studor]

Sorry -- I don't have a pic and the blower is at the country place but basically the piece on the blower shaft is a flat plate that bolts by the shear bolt to a flat plate on the end of a u-joint on the pto driveline. The set up must be fairly common.
Does the 1"shaft have a hole in it? If so the yoke may attach with a shear bolt.
As Willl pointed out, the other way you coulds do it is get a pto slip clutch from HF or TSC and just attach the driveline straight on to the shaft .
Hope this helps
regards
Steve

 

[KubotaSam]

I have a Kubota B-222A snow blower which was built by McKee. It is very similar to your blower. Mine was designed to be mounted on the front of the old style B7100 Kubotas. They were driven by a v-belt. The v-belt would slip when something jammed the impeller so they did not need a shear pin on the input shaft. Mine has been converted to a 3-PH. I am not sure if this was a dealer option or not. It works great. Now the key-way is not used and the input shaft has a 3/8" shear pin where the PTO shaft slides onto the input of the blower. I have the Kubota manual which I can scan for you when I get back to school next week. My blower has a 1 1/4" input shaft which is a little beefier than the 1" haft you mentioned. Perhaps a smaller hole for the shear bolt would be better on your blower. Check out my snow blower here:http://www.tractorbynet.com/forums/newreply.php?do=newreply&noquote=1&p=1572255

 

[Farvernugen]

Hi All,

I have a Mckee model 220 front mounted snow blower on our Kubota L225DT tractor. The blower does a great job clearing the snow off the property after we use the 6' scraper.
We recently have run into a problem with the auger bearings, and am looking for someone who might have a copy of the manual in electronic format. We have tried to find one, but so far, no luck.

I think this is the same as a Kubota B-222.

Any help would be appreciated!

 

[bx24]

Sorry -- I don't have a pic and the blower is at the country place but basically the piece on the blower shaft is a flat plate that bolts by the shear bolt to a flat plate on the end of a u-joint on the pto driveline. The set up must be fairly common.
Does the 1"shaft have a hole in it? If so the yoke may attach with a shear bolt.
As Willl pointed out, the other way you coulds do it is get a pto slip clutch from HF or TSC and just attach the driveline straight on to the shaft .
Hope this helps
regards
Steve

Steve- No hole (bummer). I was thinking I could either drill a hole and use the smooth bore yoke or using the same yoke, weld two large washers (like on the auger shaft) ... one to the drive shaft and one to the yoke. I thought about a slip clutch (and maybe I may still go that route) but I was hoping not to spend the $100.

I have a Kubota B-222A snow blower which was built by McKee. It is very similar to your blower. Mine was designed to be mounted on the front of the old style B7100 Kubotas. They were driven by a v-belt. The v-belt would slip when something jammed the impeller so they did not need a shear pin on the input shaft. Mine has been converted to a 3-PH. I am not sure if this was a dealer option or not. It works great. Now the key-way is not used and the input shaft has a 3/8" shear pin where the PTO shaft slides onto the input of the blower. I have the Kubota manual which I can scan for you when I get back to school next week. My blower has a 1 1/4" input shaft which is a little beefier than the 1" haft you mentioned. Perhaps a smaller hole for the shear bolt would be better on your blower. Check out my snow blower here:http://www.tractorbynet.com/forums/newreply.php?do=newreply&noquote=1&p=1572255

Sam-

When I got this blower, it may have had a similar setup. The drive was actually hooked up to a "reversing gear" so maybe it was intended to go on the front of a tractor. I am pretty sure the shaft on here is 1", but I am going off memory since I am not near the blower (it is stored off site). Since performance (and unfortunately stress) is proportional to the shaft speed, maybe I should set up some pulleys to increase the shaft speed ....

 

[bx24]

OK, so if I went with this HF slip clutch .... I might have to adapt the shaft size. What shaft size is "ASAE Category 3"??? And if I use a slip clutch, should I still set up a sheer pin in addition to this?

Harbor Freight Tools - Quality Tools at the Lowest Prices

 

[KubotaSam]

Hi All,

I have a Mckee model 220 front mounted snow blower on our Kubota L225DT tractor. The blower does a great job clearing the snow off the property after we use the 6' scraper.
We recently have run into a problem with the auger bearings, and am looking for someone who might have a copy of the manual in electronic format. We have tried to find one, but so far, no luck.

I think this is the same as a Kubota B-222.

Any help would be appreciated!

I will scan the book for my Kubota B-222a. I will see if I can convert the pages into a PDF file. If not I can attach then as individual jpg files. Busy time for me , it may take a few days.

 

[KubotaSam]

Here is the B-222A Blower manual.
It is a PDF file. The pages are not as clear as the original scanned images. If someone needs better images I can email the JPG files.

 

[studor]

Sorry - been away for a few days. If you use that slip clutch you should be able to just put it on the PTO shaft and hook your drive shaft to it. On the snowblower end you then would use the appropriate yoke splined on -- no shear bolt required -- the slip clutch is protection and you can use the slip clutch for other implements.
I might be tempted to drill a hole in the shaft and mount the yoke that way with a shear bolt as you described if you wish to be "frugal"
regards
Steve

 

[bx24]

Here is the B-222A Blower manual.
It is a PDF file. The pages are not as clear as the original scanned images. If someone needs better images I can email the JPG files.

Thanks Sam .... Your PDFs help

And yes Steve .... I am frugal!

 

[Rushvill]

I just had the sheer pin portion of the PTO shaft on my McKee 72" snowblower apart. The first picture shows the assembled shaft. The two parts shown in the next photos are held together with a snapring. The sheer bolt is a grade 5 3/8" bolt. The sheer bolt is 2" o.c. from the pto centerline.

The last photo is the sheer bolt on my Toro Groundsmaster snowblower. I think it is about 4' wide. The sheer bolt on that blower is also 2" o.c from the pto. It is a 1/4" bolt.

I have never broken either sheer bolt on the pto shaft, but I have broken the sheer bolt on the McKee for the auger.

Mark

 

[PILOON]

From most of my experience with blowers, the sheer bolts are always GRADE 5 bolts.
5, while fairly 'stiff' are also brittle enough to make a clean sheer.
Softer will tear rather than 'cut cleanly' and mess up the flanges.

If you have a sheer bolt on both the auger and turbine there would be no need to have any 'slip clutch' in the drive train.
Might be however an idea to clean up the faces of the sheer flanges as rust will kinda act like a brake shoe.
Might even dab a little greese on the faces.
Always use fibre lock nuts and don't over tighten, just 'snug' the nut.
I buy my sheer bolts in quantity as the go from time to time.

Chunks of frozen ice are capable of sheering the turbine 'sheer' fairly often.
The auger generally only if a rock gets in there.

I'd say that just about every 'non sheet metal' component, ie; chain, sprockets and bearings are off the shelf items at a bearing wholesaler.

Good luck, looks like a nice blower.

 

[studor]

Rushvill's pictures look pretty much like what I was trying to describe -- funny, I never broken the auger sheer but have replaced the driveline one more than a few times. I would be surprised if a farm supply could not get that type of shaft for you. As Piloon says -- no need for the slip clutch then

 

[bx24]

I just had the sheer pin portion of the PTO shaft on my McKee 72" snowblower apart. The first picture shows the assembled shaft. The two parts shown in the next photos are held together with a snapring. The sheer bolt is a grade 5 3/8" bolt. The sheer bolt is 2" o.c. from the pto centerline.

The last photo is the sheer bolt on my Toro Groundsmaster snowblower. I think it is about 4' wide. The sheer bolt on that blower is also 2" o.c from the pto. It is a 1/4" bolt.

I have never broken either sheer bolt on the pto shaft, but I have broken the sheer bolt on the McKee for the auger.

Mark

What they say is true ... a picture is worth a thousand words. The images really help!

 

[Farvernugen]

Thanks for the pdf, really appreciate you taking your time to do this for the group!

Regards, Scott
Alias, Farvernugen

 

[Bretonv]

I search the manual book of the B222 for a while. Thank's a lot for a PDF. The PDF do not include the page 10. If you still have the jpg files, I can do a new PDF with the jpg if you send me or just put the jpg file of page 10 on the forum if you want.

 

[KubotaSam]

Here is page 10.