CLUTCH ADJUSTMENT
The clutch serves to protect the door, the electric
operator and other equipment from undue stress
or damage caused by starting forces and/or an
obstruction to the door. It should be set no
tighter than is necessary to smoothly and
consistently move the door throughout its full
range of travel. When properly set, it will slip
freely if the door should encounter an
obstruction, and it should be possible to stop the
travel of the door by hand.
WARNING:
Before adjustment remove
power to the operator.
1. Remove cotter pin from slotted hex nut and
clutch shaft.
2. Back off slotted hex nut until there is
insufficient tension on clutch spring to permit
clutch to drive door.
3. Tighten slotted hex nut gradually until there is
just enough tension on spring to permit operator
to move door smoothly, but to allow clutch to slip
if door is obstructed.
4. Be sure cotter pin is reinstalled each time
operator is tested for clutch adjustment and that
it is locked in place on completion of adjustment.
CAUTION NEVER COMPRESS CLUTCH
SPRING BEYOND POINT LIMITED BY THE
DESIGN OF THE OPERATOR OR REPLACE IT
WITH A HEAVIER SPRING.
Due to changing conditions of the door and
normal wear, it may be necessary to occasionally
readjust the clutch to obtain dependable
operation.
WARNING: BEFORE DOING SO BE CERTAIN
THAT THE DOOR IS IN GOOD WORKING
CONDITION, AND THAT THE CLUTCH IS NOT
SLIPPING BECAUSE OF LOOSE OR MISSING
HARDWARE, OR THE DOOR BINDING IN THE
TRACK. ANY SERVICE REQUIRED TO THE
DOOR, DOOR SPRINGS OR DOOR
OPERATOR MUST BE PREFORMED BY A
QUALIFIED PROFESSIONAL DOOR
INSTALLER.
The clutch pad will wear during normal operation
and should be replaced when it becomes difficult
or impossible to sufficiently tighten the clutch to
obtain smooth operation of the door when it is in
good working condition. To replace the clutch
pad, first loosen the motor mounting bolts and
remove the V-belt then the clutch adjusting nuts,
spring and clutch pulley. Check condition of V-
belt before reassembly and replace if required.
After reassembly, adjust clutch as described
RISK OF ENTRAPMENT THAT MAY RESULT
IN SERIOUS PERSONAL INJURY OR DEATH.
DISCONNECT POWER TO THE OPENER
BEFORE SERVICING OR MAKING
ADJUSTMENTS. ENSURE DOORWAY IS
CLEAR BEFORE STARTING TESTING OF
UNIT.
WARNING
OPERATION AND ADJUSTMENT INSTRUCTIONS
18
DO NOT STAND IN FRONT OF DOOR TO
TEST REVERSING EDGE. USE A
CORRUGATED BOX OR SIMILAR OBJECT.
WARNING
IMPROPER ADJUSTMENT OF CLUTCH
SETTING COULD CAUSE ENTRAPMENT,
INJURY OR DEATH. SET CLUTCH ADJUSTMENT
FOR JUST ENOUGH FORCE TO OPERATE THE
DOOR RELIABLY, BUT NO STRONGER. Contact
a service professional to correct any binding,
sticking or other door problems. DO NOT OVER-
ADJUST CLUTCH SETTING TO COMPENSATE
FOR A POORLY WORKING DOOR.
WARNING
Summary of Contents for SL Series
Page 26: ...Notes ...
Page 27: ...Notes ...
