The blade belt broke so I pulled the deck off and I noticed the heavy spring (shown in attached picture) on the left. It is connected on one end to a bolt mounted to the deck and the other end is hooked into an arm that has an idler pulley.
I tried to pull the arm in the direction of the spring tension but I couldn't budge it.
Is this arm supposed to move? It is pushed up against two rubber stoppers which is a position that puts maximum tension on that spring.
There is a bolt near the center of the arm that looks like if it was loosened would allow the arm to pivot. It seems that if the arm could move, the spring would pull the arm in a direction that would add tension to the belt.
I haven't made any adjustments here at all, this is the 1st time I looked at it closely.
Thanks for any help,