Force& Limit Adjustment - Craftsman 139.53403 Owner's Manual

Adjustment
STEP 1 Adjust UP and DOWN L imits
LIMIT ADJUSTMENT settings regulate the points at which Limit
the door will stop when moving up or down w_-_ "Adjustment
NOTE: Door STOPS in UP direction if anything inter- _ o _'_"_
Screws
fereswithdoortraveI. The door REVERSES in DOWN _--_ -- 7 _/ _ ._.___
direction if anything interferes with door travel (includ- ,,=,_ _,,,=L _,=_T , O._=E,T
ing binding or unbalanced doors). .....
PROCEDURE:Tooperateopener, pressWa,,Contre, push i/.( _¢4"._ °""'_*" ....... -- ....
button or transmitter. Run opener through a COMPLETE
TRAVEL CYCLE Limit adjustments are not necessary when
the door opens and closes completely and does not reverse Left Side Adjustment Label
unintentionally in down direction Panel
The following chart outlines adjustment procedures. Run opener through a COMPLETE TRAVEL CYCLE AFTER
EACH ADJUSTMENT. NOTE: REPEATED OPERATION OF THE OPENER DURING ADJUSTMENT PROCEDURES
MAYCAUSETHE MOTORTO OVERHEATAND SHUTOFF. SIMPLYWAIT15 MINUTESANDTRYAGAIN. Readthechart
carefully before proceeding to Step 2_ Use a screwdriver[ to make limit adjustments
LIMIT ADJUSTMENT CHART
IF DOOR DOES NOT OPEN COMPLETELY
BUT OPENS AT LEAST FIVE FEET
increase UP travel Turn UP LIMIT adjustment screw clock-
wise One turn equals 2 inches of travel
If door doesn't open at least 5 feet: adjust OPEN FORCE
as explained in Step 2
IF DOOR DOES NOT CLOSE COMPLETELY
(ON SECTIONAL DOORS)
Lengthen the door arm (See Step lg, Page 16)
If door arm is at maximum length, increase DOWN travel
Turn down limit adjustment screw counter clockwise One
turn equals 2 inches of travel
If door still will not close completely, the header bracket is
positioned too high Repeat Step 1, Page 10
IF DOOR DOES NOT CLOSE COMPLETELY
(ON ONE-PIECE DOORS)
Increase DOWN travel Turn down limit adjustment screw
counterclockwise One turn equals 2 inches of travel
IF DOOR REVERSES WHEN CLOSING AND THERE
IS NO INTERFERENCE TO TRAVEL CYCLE
Test door for binding: Pull emergency release handle
Manually open and close door If door is binding, call a
door serviceman
If door is not binding or unbalanced, adjust CLOSE FORCE
See _Step 2
IF OPENER REVERSES IN FULLY CLOSED POSITION
Decrease DOWN travel Turn down limit adjustment screw
clockwise One turn equals 2 inches of travel
STEP 2
Adjust Force
DO NOT USE FORCE ADJUSTMENTS TO COMPENSATE FOR A BINDING OR STICKING GARAGE DOOR.
EXCESSIVE FORCE WILL INTERFERE WITH PROPER OPERATION OF SAFETY REVERSE SYSTEM OR
DAMAGE GARAGE DOOR.
Force Adjustment Controls are located on rear panel of
opener FORCE ADJUSTMENT settings regulate amount
of power required to open and close door
NOTE: Door STOPS in UP direction if anything inter-
feres with door travel,, The door REVERSES in DOWN
direction if anything interferes with door travel (includ-
ing binding or unbalanced doors).
If force adjustments are set too fight, door travet may be
interrupted by nuisance reversals in DOWN direction and
stops in UP direction As weather conditionscan affect door
movement, occasional adjustment may be needed.
The maximum force adjustment range is 260 degrees, about
3/4 of a complete turn Do not force controls beyond that
point Turn force adiustment controls with a screwdriver
Back Panel
of Opener
Force
Adjustment
. Controls
FORCE ADJUSTMENT CHART
TEST DOWN (CLOSE) FORCE
Grasp the door handle or door bottom when door is about
halfway through DOWN (C LOSE) TRAVEL The door should
reverse. If the door is hard to hold or doesn't reverse, de-
crease the DOWN (CLOSE) FORCE by turning the pontrol
in a count er clockwise direction Make 10 degree turn adjust-
ments until the door reverses normally After each adjust-
ment, run the opener through a complete travel cycle
Adjustment
Label
IF DOOR DOESN'T OPEN AT LEAST 5 FT
Increase UP (OPEN) FORCE by turning control clockwise
Make 10 degree turn adjustments until the door opens
completely Readjust UP LIMIT if necessary After each
adjustment, run opener through a complete travel cycle
IF DOOR REVERSES DURING DOWN (CLOSE) CYCLE
Increase DOWN (CLOSE) FORCE by turning control clock-
wise Make 10 degree turn adjustments until the door
completes close cycle After each adjustment, run opener
through a complete travel cycle
17