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Installation 16
Step 5: Arm and Turnbuckle Shaft Adjustments
CAUTION
Turn off power before making any adjustments.
MODEL BG770 ADJUSTMENTS
1If necessary, rotate the pulley on the motor by hand until the crank arm on the gear reducer is perfectly aligned with the turnbuckle shaft (see Figure 11). This is the lowest point of the arm travel and should be preset in this position at the factory.
2If the arm is not level, loosen the jam nuts at both ends of the turnbuckle shaft Insert a screwdriver or other similar tool into the hole in the shaft. Rotate the shaft either CW or CCW as necessary until the gate arm is in the desired horizontal position. Retighten jam nuts.
Pivot Arm
Jam Nut
Pulley
Turnbuckle Shaft
Crank Arm
Figure 11: Model BG770
BG770 TURNBUCKLE SHAFT ALIGNMENT
If necessary align turnbuckle shaft with center of crank arm for lowest point of travel of pivot arm (see Figure 12).
Figure 12
Doc
Rev E