L118 lawn tractor (42-inch twin blade). Blades turn under engine power while disengaged

[NW1]

Hello,

On my L118 lawn tractor (42-inch twin blade), the blades turn under engine power while disengaged. There seems to be plenty of slack in the belt, and it work fine while engaged. I'm running the deck at a medium height to keep the drive and blade pulleys as parallel as possible.

Thank you.

 

[Auto Doc's]

Hello NW1,

The first suspect is wrong belt or incorrect routing.

If they are trying to turn slow, but not up to full speed, the deck pulley brake is badly grooved and no longer holding.

Part #17 in the diagram.

ARIMain - WEINGARTZ

Find parts for your john deere mower drive belt, sheaves, spindles and blades with our free parts lookup tool! Search easy-to-use diagrams and enjoy same-day shipping on standard John Deere parts orders.

www.weingartz.com

 

[StarTech]

And even be a slightly bent double stack engine pulley but make sure the spindle brakes are good and working