New Holland 615 Operator's Manual page 57

PROBLEM
Uneven stubble/streaking.
Stubble too long.
Drive belt failure.
Soil buildup on front of cutter bar.
Excessive power consumption.
SECTION 5 - TROUBLESHOOTING
POSSIBLE CAUSE
Too much tilt on cutter bar.
Low PTO speed.
Excessive forward speed.
Knives dull or broken.
Knives stuck under disc.
Knives installed on wrong discs.
Drive belt loose.
Incorrect angle on cutter bar.
Ground speed too fast.
Worn or damaged knives.
Low PTO speed.
Incorrect alignment or tension.
Very wet crop conditions.
Crop wrappage on end drum and
swathboard. (if equipped)
5-2
CORRECTION
Reduce tilt.
Run PTO at 540 RPM. (Do not
overspeed)
Reduce forward speed.
Install new knives.
Straighten or replace knives.
Install knives on correct discs.
Tighten drive belt spring to correct
length.
Change cutter bar angle.
Reduce ground speed.
Replace knives.
Run PTO at 540 RPM. (do not
overspeed)
Check sheave alignment and belt
tension.
Adjust main frame and cutter bar
flotation. Reduce cutter bar angle.
Install high stubble kit.
Remove swathboard. (if equipped)