4.14
Section 4: Installation - Trolley
Drawbar Installation
5) Use a level, as shown in Fig. 8 to find the highest point of travel
for the door.
6) Mark a horizontal line across the vertical line you made on the
header at 5” above the highest point of door travel.
7) Raise the door end (idler pulley) of the drawbar while resting the
operator on the floor or other desired material.
8) Position the header bracket on the centerline with its bottom
edge on the horizontal mark. Fig. 9.
•
Fasten header bracket to header using fasteners appropriate for
the header material.
Figure 9
2" X 6"
HEADER
MARK A HORIZONTAL LINE
5" ABOVE
HIGHEST POINT OF TRAVEL
LEVEL
HIGHEST POINT
OF TRAVEL
Figure 8
