Mower deck mtd--power take off will not engage blades

[peterfrain1943@gmail.com]

Pushing the PTO lever forward will not engage blades. Belt seems ok and it moves, but it seems the belt does not get tight enough. The blades and spindles are not frozen. HELP!

 

[fuzzman]

id suggest what was suggested to me but don't have make and model to do so!