15
A
B
Clutch Nut
To Loosen
To Tighten
Apply power to operator.
Turn clutch nut to release tension.
Re-tighten nut until there is just enough tension to permit
smooth operation.
Replace cotter pin. Bend ends of cotter pin to secure
clutch nut.
ADJUST THE LIMITS
Depress retaining plate.
Adjust OPEN limit.
Adjust CLOSE limit.
Retaining Plate
Decrease
Door Travel
Increase
Door Travel
OPEN Limit Switch
OPEN Limit Nut
CLOSE Limit Switch
CLOSE Limit Nut
SAFETY Limit Switch
Decrease
Door Travel
Increase
Door Travel
NOTE:
When retaining plate is released, verify that the retaining plate is fully seated with the notches of the limit nut.
ADJUSTMENT
1
2
3
FOR MODELS MJ, MH, AND MHS ONLY
1
2
3
4
ADJUST THE CLUTCH
To avoid SERIOUS personal INJURY or DEATH from
electrocution:
• Disconnect electric power BEFORE performing ANY
adjustments or maintenance.
ATTENTION
AVERTISSEMENT
AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNING
WARNING
PRECAUCIÓN
ADVERTENCIA
ADVERTENCIA
ADVERTENCIA