Re: John Deere Power Flow Leaves strip of clippings.
1-How old is the system (for wear)?
2-How dry is the grass?
3-How much are you cutting off the grass?
4-How high do you have the deck set?
5-Does this issue start with an empty collection system or only when it's close to being full?
6-Do you have the antiscalp wheels set lower on the right side of the deck?
I've found that these are the biggest issues with using my Power Flow system. I routinely use gator blades and have no problems generally with the lift they create, unless the grass is wet; by wet I mean "juicy" and rapidly growing, not just dewy or rained on.
As the turbine wears, it gradually loses vacuum, and even Gator blades start losing lift as the 'ears' on the blades wear.
If you have the deck set to a fairly high level (3" or more), you begin to lose the effectiveness of the anti-blowout plates and the deck also allows more air to be pulled in from around the edges, decreasing overall vacuum. The more you cut off the grass, the heavier the mass that the vacuum is trying to move, and the more that will get left behind. The left side of the deck starts to lose vacuum first. The partial solution to cutting more, cutting higher, and cutting 'wetter' grass is to slow down, sometimes a lot slower than you want to go.
Once the collection bag or cart starts getting close to full, the less air can pass through the system, which starts causing it to back up. First you start getting what you're describing, a trail of clippings left behind, then the chute begins to clog.
The last thing, with the antiscalp wheels, is that they help keep the deck level, due to the weight of the turbine head. If the deck is even slightly off level, you lose vacuum out the left side, not to mention a more uneven cut, which may go unnoticed.
Maybe your issue is something else, but these are the things I've discovered from using a PowerFlow, with the MC519 collection system, on a 54C deck, for the last ten years.
Proud owner of :
'08 JD X748SE, 54C deck
3-pt hitch, rear PTO
Power Flow and MC519 cart
LP RTR0550 rototiller
?? 60" box blade
Simplicity 10" plow adapted to 3-pt hitch
3-point PTO DR wood chipper
'02 JD GT235, 48C deck
'84 JD 318, 50" deck
'86 JD 214, 46" deck
'86 JD 212, 38" deck