Wayne-Dalton 3790 Garage Door Opener User Manual


 
3
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You can reach us Toll Free at 1-888-827-3667 for Consumer Assistance or online at www.wayne-dalton.com
R1
Retro-Fit Installation
Spring Tension Removal
Counterbalance spring tension must be
relieved before removing any hardware.
A POWERFUL SPRING RELEASING ITS
ENERGY SUDDENLY CAN CAUSE SEVERE,
EVEN FATAL INJURY.
NOTE: Warning tag removed for illustration
clarity.
Place door in the fully closed position and
remove drum wraps from cable drums (if
installed).
Using a 7/16" wrench, loosen lock nut on
the back of the end bracket. Using a power
drill (high torque/gear reduced to 1300 RPM
preferred), with a 7/16" socket driver,
unwind the right hand winding bolt counter
clockwise until the counter cover shows “0”
(zero). If the door has two springs, repeat
this process for the left hand side.
NOTE: A door with only one spring will not
have a counter assembly on the left hand
side.
NOTE: Spring(s) is/are fully unwound when
counterbalance cables have no tension.
CAUTION: DO NOT USE AN IMPACT GUN
TO UNWIND THE SPRINGS!
NOTE: It is recommended that cable drums
and end bracket assemblies get updated to
current designs for optimal performance.
current end brackets are made of metal
instead of plastic, and counter cover and
worm gears are made of grey plastic, instead
of black and white plastic. If new parts are
required, contact Wayne-Dalton customer
service.
Tools Needed:
Flat Tip
Screwdriver
Step Ladder
R2
Right Hand Counter Removal
IMPORTANT! RIGHT AND LEFT HAND IS
ALWAYS DETERMINED FROM INSIDE THE
GARAGE LOOKING OUT.
Remove the counter cover. Slide a flat tip
screwdriver between the end bracket and
the counter gear.
Gently pull the counter gear away from the
end bracket. If the door has two springs,
repeat this process for the opposite side.
7/16”
Wrench
Lock Nut
Power
Drill
Counter
Balance
Cable
Drum
Wrap
End Brackets
(Metal)
Counter
Cover
Worm
Gear
Counter
Gear
Flat Tip
Screwdriver
End Brackets
(Metal)
Counter
Cover
WARNING
Winding
Bolt
Winding
Bolt
Tools Needed:
7/16" Wrench
Power Drill
7/16"
Socket Driver
Step Ladder
Cable
Drum
7/16”
Socket Driver
Retro-Fit TorqueMaster
®
RETRO-FIT TORQUEMASTER
®