Small Engines (Lawn Mowers, etc.): v-belt loose after replacement, customer service dept, proper model

Question
I have an MTD Model 760-770 Lawn Mower with a 42" deck.  I have replaced the v-belt with the proper model # 754-04060B.  I had purchased it from Home Depot where I purchased the lawn mower 4 months ago.

After replacement of the belt the belt is too loose to turn around pulleys.  I have followed the directions in the manual, and even removed the deck to get a better position to work on it.  I cannot find how the belt should be tensioned so that it will operate properly.  It has nothing in the manual stated about a loose v-belt.  Can you help me please?  Thank You.

Answer
I knoww the guys at MTD . You shoul contact them because it is under warranty.  MTD is in Cleveland, OH and you want to talk to the customer service dept.  Mike is the manager.


Just a couple things to check.  Are the idler pullies flat or V shaped? If they are flat, they on the outside the belt, and if V-shaped along the inside of the belt. You will normally see in the linkage where a brake or clutch would operate if tightened.