(quoted from post at 10:35:17 02/15/16) Before anyone says it, yes I know I adjust the string tension on each side of the chute with the hand cranks.
IMHO - cranking down the bale tension is never the remedy for banana bales with a New Holland baler.
Banana bales are caused generally from not having enough hay in the LH side of the bale chamber.
First thing - as was mentioned, check the hay dog springs.
Second, measure your aluminum feeder tine forks. They should be 13ish inches long, but over time and unnoticed, can wear down several inches. If they are short, they will not deliver hay to the far side of the bale chamber.
Third, the plunger to stationary knife clearance should be something on the order of 1/32 inch. If there's a big gap, hay will be pulled into the bale chamber by the knife, increasing hay on the RH side of the bale chamber.
Fourth, if all the above is OK, then you can adjust your left most feeder tines (and maybe the middle ones with it) to the RIGHT (counterintuitive) and it will put more hay into the LH side of the baler.
Fifth, biggish windrows, not huge, but full - feed the pick up to the left side of the pickup.
Lastly, I believe the S69 is essentially a 68 with roller bearings on the pickup vs wooden slides. My 68 is a much better baler when I'm running it full 540 PTO rpm and getting 15ish flakes to a bale.
We did a refurb on our 68 last year and fixed/adjusted the items above (less the feeder tines as ours were Ok) and pounded out beautiful brick shaped bales over the summer.
Fine baler you've got. Don't hesitate with any questions.
Good luck,
Bill