Wayne-Dalton DS-75 - STEP 6: ATTACHING SPRING; STEP 7: PRE-TENSIONING THE DOOR SPRING

7
HINT:
STEP 6 ATTACHING SPRING
Rotate curtain assembly so that the bottom bar is at the top of
the curtain roll. While keeping the curtain from rotating,
carefully stretch the spring end to the bracket to determine the
bracket hole nearest to the loop in the spring end. Position the
5/16-18 x 1” hex head bolt and flat washer in the spring loop
and stretch the spring to insert the bolt into the previously
determined bracket hole. Loosely install the lock washer and nut
on the outside of the bracket to hold the spring stretch. Rotate
the spring until it is centered on the bracket and securely tighten
the spring attachment bolt.
(Axle Pin installed in step #5 omitted from view for clarity)
For an easier way of installing the spring attachment bolt, if the installation
permits, use vice grips to temporarily secure spring loop to bracket.
STEP 7 PRE-TENSIONING THE DOOR SPRING
Spring tension can cause curtain assembly to rotate rapidly,
possibly resulting in severe or fatal injury. To prevent such
injury, securely hold curtain assembly to prevent rotating.
Starting with the bottom bar at the top of the curtain roll, apply
two complete turns of pre-tension to the spring by rotating the
curtain roll in the direction shown. The amount of tension
required may vary slightly. Final adjustment, if necessary, will be
made in STEP #9.
Cut the tape that holds the curtain in a roll and gently pull the
curtain down into the guides on both sides until the bottom bar is
below the bottom bar stops. Do not pry on the bottom bar stops to
get bottom bar past the stops. Instead, loosen fasteners until
bottom bar angle easily clears stops. If the door has a tendency to
close, secure it in position using clamps. If the door has a
tendency to rise, secure it in position using a wood prop.
Securely hold curtain assembly until bottom bar stop fasteners
have been tightened. If not securely held, curtain could rotate,
possibly causing severe or fatal injury.
With the door kept from moving, tighten the bottom bar stop fasteners on both guides. Remove clamps or wood
props.
WARNING
WARNING