Mower deck JD 455 is leaving streaks

[garyrc]

I have a 1996 455, very low time tractor that leaves streaks in my lawn. I have adjusted the deck both ways, tire pressure is as right on and blades are sharp. Has anyone else had this problem. Any advise would be greatly appreciated. Gary

 

[mechanic mark]

Are spindle bearings in good shape? Worn bearings will create a drag in rotation of blades, not allowing blades to turn at max. rpms. If they are greasable spindles give them some grease.

 

[BBO]

Is it the correct JD blades?
Are the blades really worn with rounded corners?
How high are you mowing the grass?

 

[Homer1]

When you say streaks, do you mean strips of grass in between the blades not being cut, or lower/higher cut on either side, etc.. More detail on the type of cut experienced needed for me.

If your leaving strips of uncut grass it's likely a rounded blade tip as mentioned. These need to be straight and butter knife sharp along the face. Tire pressures must be even also.