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Simplicity M-1 Motor Pulley


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#1 VonWolfen OFFLINE  

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Posted August 14, 2012 - 08:12 PM

My first post. I picked up an M-1 that has really been altered or rigged. Someone put a 9 HP Briggs on it and modified the mount to somewhat make it line up pulley-wise. It has a single motor pulley. I have an old 3.5 Briggs that will work properly, but I'm having a bit of an issue with the motor pulley for the old manual 4 speeds. Part number was D-A64 in old parts lists for the 3 HP 4 speed. It looks like a 3 pulley set up in the pics. I could use some help on the specs on that pulley...and if they are available anywhere or a suitable substitute. I called simplicity (local) and had no luck at all. Thanks.

#2 Ryan313 OFFLINE  

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Posted August 14, 2012 - 08:17 PM

:welcometogttalk: There is a good walk behind following here and they will be able to help you out!

#3 GWest OFFLINE  

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Posted August 14, 2012 - 08:21 PM

Have many of the pulley sizes but not that one. Used on the M and M-1 only. Think you are correct on the 3 grooves. The newer part number is 8021066.

Garry

#4 VonWolfen OFFLINE  

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Posted August 15, 2012 - 07:36 PM

Thanks...if anyone has an M or M-1, maybe you could check your pulley set and let me know what diameter the 3 pulleys are. I think they are sequenced with the largest diameter on the inside (closest to motor). It would be a big help...thanks

#5 GWest OFFLINE  

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Posted August 16, 2012 - 07:35 AM

Most engine pulleys are turned around to give you 2X the ground speeds. The driven transmission pulley is also reversed on some making quite a range of speeds.

Some of these engines had 5/8" crankshaft diameters and others 3/4" so some are the same OD'S but 2 different pulleys.

Garry

#6 achomesteader OFFLINE  

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Posted August 16, 2012 - 10:10 AM

You might want to try contacting Simplicity for Technical Service. I have obtained pulley specs for NLA pulleys from them before. Maybe they still have the specs for the pulley you need.

You can use this link:

http://www.simplicitymfg.com/contact/

After filling out your contact information, you will see the drop-down list under "Subject". Select "Technical Service". Under "Regarding My", select "Yard & Garden Tractor". Under "Product ID", enter "995621". Under "Comments", ask for specs (ID, ODs of the three steps and width) of the engine pulley, number 8021064.

The number, 8021066, listed in an earlier post, is for a reduction pinion.

#7 VonWolfen OFFLINE  

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Posted August 16, 2012 - 04:08 PM

Thanks...I will contact tech services. Mine is a 3/4 shaft for sure.

GT Fanatic: I think he meant 8021068....which is , I think, the right part.

#8 GWest OFFLINE  

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Posted August 16, 2012 - 07:14 PM

I think 8021064 is correct for the D-A64 and I should have picked up on that. The last 2 digits are usually the same. If you are using the 995621 manual where the new numbers have been written in many of them are not correct. They are one line out.

Garry

#9 VonWolfen OFFLINE  

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Posted August 16, 2012 - 07:41 PM

Thanks Garry....I used the old part number in my message to Simplicity tech services. I also described the part and noted the tractor model number and years of manufacture. We'll see what they come up with. It may help someone else in the future.

#10 achomesteader OFFLINE  

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Posted August 17, 2012 - 04:31 AM

Thanks...I will contact tech services. Mine is a 3/4 shaft for sure.

GT Fanatic: I think he meant 8021068....which is , I think, the right part.


Part no. 8021068 is an axle key.

#11 VonWolfen OFFLINE  

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Posted August 17, 2012 - 10:45 AM

Wow....it seems like that replacing number is hard to pin down!

#12 VonWolfen OFFLINE  

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Posted August 21, 2012 - 08:27 AM

I received an interim response from the technical department at Simplicity. The individual said that he was unable to find the data requested, but that he would refer the question to senior engineering for help. That individual is out of the office until some time in September. I'll report back when I hear something.

#13 VonWolfen OFFLINE  

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Posted August 28, 2012 - 02:54 PM

I received a response from the senior engineer at Simplicity. I'll post it here in case it may be of use for others.

"Hello Ed, We were able to locate some good information here for you. All 3 pulley grooves are 1/2" wide, which is not unusual at all. The OD's are as follows: 2 1/4", 2.9", & 3 1/2". It was made of cast iron. Enjoy working on it"
  • achomesteader said thank you




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