Small Engines (Lawn Mowers, etc.): my 1979 Toro 524 snow blower, series numbers, ogger

Question
when i use my toro i was useing it one day and there was a medium size chunk of rock that got caught where the ogger was so i pulled it out throught it in our woods and next day when i used it i whent through a foot of snow!and started to make a grinding noise that would come and go & after right where you change the oil! there was some oil that came out like light choclate milk shake that came out!i called the toro such as markham mower and they say to me that i wrecked a seal!and they said they would have to hear it to know what it would be!but i don't know whitch seal it is and how much it would cost?$$$$ and if it's eay to do or not?if some one could answer me back thanx!

Answer
Hello John:

The 524 is the Series Numbers. Send me the Model Numbers Off the Unit, Please. With these I can Locate the Proper Manual and Better Assist you. **If you Need Assistance in Locating the Model Numbers, then You can Go to this Site Addy; https://lookup3.toro.com/partdex/default.cfm and Select Step 1.**  Thanks.

Respectfully

John

PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Thanks.

Respectfully

John