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PRE-ADJUSTMENT TIP
BEFORE PROCEEDING TO THE ADJUSTMENT SECTIONS, READ THE FOLLOWING TIP
(REFER TO FIGURE 1)
Think of the drive pulley crank arm(s) and the connecting link(s) as each having its own independent role
The crank arm determines the total door trav
el. The further the arm is away from the drive pulley, the
longer the door travels.
The connecting link determines the door
position. The longer the arm, the further the door moves
from the jamb.
Example:
If the door opening is 42” but the door travels only 40” as stopped by the open and close limit cams, do
not alter the cams. The cams have been factory pre-set. Correct the under travel by extending the crank
arm outward from the drive pulley until the door travels 42” from fully open to fully closed (as determined
by the limit cams), then fasten the crank arm in place.
Now, loosen the connecting link bolts, close the door against the stop roller and tighten one of the link
bolts. Open the door until the open limit is activated and check the door position. If the door is not in the
proper open position, close the door and readjust the connecting link. Repeat the above steps until the
operation is complete and the fasten the two link bolts. Make sure that the closing door is stopped
against the stop roller and not the strike post.
Remembering the above two points will facilitate door adjustments.
Bear in mind, that the drive pulley crank arm position and the cams are pre-set by our factory as
indicated on the installation drawings.
FIGURE 1
G.A.L. Manufacturing Corporation December, 2007
THIS LENGTH AFFECTS THE TOTAL
DOOR TRAVEL FROM FULLY OPEN
TO FULLY CLOSED.
THE LONGER THE LENGTH THE
LONGER THE TRAVEL.
DRIVE PULLEY
CRANK ARM
ADJUST THE CRANK ARM
TO SET THE DOOR TRAVEL.
CONNECTING LINK ASSEMBLY
ADJUST THE CONNECTING LINK
ARM TO SET THE DOOR POSITION.
THIS LENGTH AFFECTS
THE DOOR POSITION
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