how to adjust a Signature (Nelson) rotor head

Arc Adjustments

FULL CIRCLE ADJUSTMENT
For FULL CIRCLE; leave black side up. No need to set collars.
PART CIRCLE ADJUSTMENT
- A. REMOVE CLICK-SET DISK
  and manually turn sprinkler until nozzle points to
  the center of the desired wa t e ring area.
- B. PLACE CLICK-SET DISK IN POSITION GRAY SIDE UP
  Adjust collars to desired angle.
- C. MEMORY RING PROTECTION
  If sprinkler is manually turned past the set pattern, the memory ring will pop temporarily out of position while the sprinkler rotates around to its original part circle pattern . If the memory ring gets out of position while you are setting the pattern, remove the disk and rotate the ring with your fingers until the tab clicks into place.
QUICK ADJUST
Ratcheting piston allows for quick turret adjustment for part-circle applications— wet or dry.
* THE RATCHETING PISTON, WET OR DRY, WILL NOT
BREAK DURING ADJUSTMENT.