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Snownblower chain coming off sprocket

I have a Sears snow blower model 536.886621. Chain continues to come off sprocket. I have the owners manual, but am looking for tips to correct issue.

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Electric Snowblowers , Tools
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16 Answers from these members:
Mark T
You should be able to purchase the chain and the master link at any local hardware store. The chain size is number 42. Take the old chain to make sure the piece that is cut is long enough.
by Mark T Earned 1,607 community points in Tools
January 26th, 2011
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Manage My Life
Mark - really appreciate all the help you have provided. From all I read, I think I am looking to replace with a chain that does have a Master Link.

I do not have the correct tools or time to remove both sprockets in order to add an endless chain. Is there a replacement chain I can use that is endless? This way I can cut the old one off and replace with new one (without having to remove sprockets).
by Manage My Life
January 25th, 2011
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Mark T
I have called Murray and according to Chuck, the chain is endless. This means you do not need the link with this chain. It was a little difficult to obtain this information because the original company filed bankruptcy in 2005. The new Murray does not support anything made before 2005.
by Mark T Earned 1,607 community points in Tools
January 25th, 2011
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Manage My Life
Hello Mark - wanted to follow-up on your last post.....any luck speaking directly with the manufacturer? Thanks
by Manage My Life
January 24th, 2011
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Mark T
I have checked the link you have provided and you are right the parts list shows the link and the chain. I will contact the manufacture tomorrow to see if you should order both. Nothing I found has the master link. I will keep you posted.
by Mark T Earned 1,607 community points in Tools
January 23rd, 2011
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Manage My Life
OK thanks. I am finding varying responses as well.....I found this owner's manual, if you look at page 42, there is reference to replacement chain (579867) and what seems to be a master link (760504):

managemylife.com/mmh/lis_pdf/OWNM/L0010539.pdf
by Manage My Life
January 23rd, 2011
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Mark T
The first image shows a master link and the second image shows the replacement chain. I have checked other sources and they state the replacement chain does not have a master link.
by Mark T Earned 1,607 community points in Tools
January 23rd, 2011
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Mark T
I have looked up the chain and there is not a master link in the replacment chain.
by Mark T Earned 1,607 community points in Tools
January 23rd, 2011
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Manage My Life
Does that specific replacement part have a removable link? Is there an alternate contact if you are unsure. Thanks
by Manage My Life
January 23rd, 2011
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Mark T
All of the chains I have replaced did not have a master link. they are pre cut and connected. To replace the chains you have to remove the shafts it is looped around. If you decide to do this, I recommend taking pictures and make note as you go so you do not get lost when putting it back together. It is not that difficult of a repair if you have the picture to refer to later.
by Mark T Earned 1,607 community points in Tools
January 23rd, 2011
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Manage My Life
Thanks Mark T - I checked the sears website and it recommends the following:
searspartsdirect.com/partsdirect/part-number/579867/0071/536&pathTaken=partSearch&blt=14&prst=0#

I called the parts department asking if this chain has a removable link, but they said they do not have the info (and that I need to add a post to this website). Can you tell me if this replacement part has a removable link? Thanks
by Manage My Life
January 23rd, 2011
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Mark T
There is not an adjustment for the chain on your snow blower. Over the year, the chain will stretch but it is not often they stretch so much they come off. If the chain is real loose you can try to take a link out to shorten it up.
Most of the chains are put together without a master link. if you chain does not have a master link you cane but one at a good quality hardware store. I think the size is number 35. To remove and cut the chain use a small grinding wheel to remove the nubs on the link. I have provided an image below showing where to grind. Once the nubs are ground down even with the link use a chisel to pop the side of the link off. Then remove the rest of the link from the other side. Once you have the link out, you should be able to determine if removing a link will make the chain too short. After you have the chain cut, you can put it back together with the master link you had purchased. I hope this is helpful.
by Mark T Earned 1,607 community points in Tools
January 23rd, 2011
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Manage My Life
My solution above worked for a short while, but after one usage, the chain fell off again. Two follow-up questions:

1. Does this model allow for adjusting the drive wheel chain tension? I found the following thread, but not sure it is the same model (although it is referring to craftsman):
fixya.com/support/t1649613-drive_chain_coming_off_craftsman

2. Is there a "pin" in the chain so I can remove one of the chain links (in order to shorten).

Thanks
by Manage My Life
January 21st, 2011
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Manage My Life
Mark T. - thank you for your reply.....your 1st two suggestions seemed to do the trick. I tightened the bolts on the sprockets and added washers to the shaft (which eliminated the side to side play). Initial run was a success.....crossing my fingers.

Thanks again!
by Manage My Life
January 17th, 2011
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Mark T
Thank you for your question.

I am sorry you are having a problem with the snow blower. If the chain keeps coming off I recommend checking shafts first. If the shaft has a lot of play side to side, it will allow the sprocket to move with it, resulting in the chain jumping off. if the shaft has excessive play look for worn bearings or missing washers. Missing washers is common if you have replaced the friction wheel at any time. If the side play is fine check, the bolts on the sprockets they should be tight. Next, check for wear in the chain. There is not any adjustment in the chain and if it is worn, it will come off easily. Besides what I have already mentioned, I cannot think of anything else that would cause the chain to come off. I hope this is helpful.

Here is a link to order any parts you need.

Sears Parts Direct

.

If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:

Sears Home Services

.



Please let me know if you need further assistance.

Thank you for using Manage my life.

Mark T.
by Mark T Earned 1,607 community points in Tools
January 17th, 2011
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Manage My Life
This particular problem appears to be shared by others. While you wait for the expert to review your model and respond, you can check the two links below if you like. They are web site forums and the discussion is for like issues. Hope this helps!
by Manage My Life
January 15th, 2011
Answered in 19 minutes
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