JOHN DEERE S120 Mower Uneven Cut Deck Level

Mower Blade Set (42-inch)

Uneven cuts are most frequently caused by 'blade tip tracking' errors where one or both blades have suffered kinetic deformation. Even a slight bend in the metal prevents the blades from rotating in the same horizontal plane, resulting in a 'stepped' appearance in the turf. Replacing the set restores the factory-specified cutting plane.

SKU: AM141033

Rear Deck Lift Link

The rear lift links are the primary mechanical adjustment points for side-to-side leveling. If the threads are stripped due to vibration or the link itself is bent from a deck strike, the deck will hang at an angle relative to the chassis, causing one side of the swath to be lower than the other.

SKU: GX21693

Front Draft Rod

This component manages the front-to-back pitch of the mower deck. If the rod is bent or the adjustment hardware has migrated, the deck pitch will deviate from the required 1/8-inch nose-down orientation, causing the grass to be pushed over before it is cut or resulting in an uneven discharge pattern.

SKU: GY20438