Go to www.consew.com and click on manuals/224. The 224/225/226 are all the same. Or, go to www.singer.com and click on manuals for 111w/G155, or 211/w/G155. They're the same machines. Or, click on google and enter the search terms. There are a lot of places to get service manuals. Consew's are free. You may have to pay a few buck from other places but they aren't expensive.
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Go to www.consew.com and click on manuals/224. The 224/225/226 are all the same. Or, go to www.singer.com and click on manuals for 111w/G155, or 211/w/G155. They're the same machines. Or, click on google and enter the search terms. There are a lot of places to get service manuals. Consew's are free. You may have to pay a few buck from other places but they aren't expensive.