LiftMaster SW470 SW490 GL BOARD Manual - Page 14

I N S TA L L AT I O N CONTROL ARM ASSEMBLY (SW490) continued Gate Hinge Open gate position 2" 34" Closed gate stop D Control arm hub assembly Output Shaft C 13" Gate Length B A 4.5" 90º Closed gate position Pipe Gate Bracket Extension Arm Holder Control arm extension Extension Arm X Y Gate Center Line Gate Length (Feet) A Dimension (Inches) B Dimension (Inches) C Dimension (Inches) D Dimension (Inches) X Dimension (Inches) Y Dimension (Inches) SW490 Gate Installation Table 8-9 10-11 12-13 14-15 16-17 4.5 4.5 4.5 4.5 4.5 24 30 36 42 48 13 13 13 13 13 25.9 29.3 32.8 36.3 39.7 *25.7 *29 *32.8 *36.9 *41.2 **17 **20.6 **23.8 26.6 29.3 18-19 4.5 54 13 43.2 *45.6 31.8 20-21 4.5 60 13 46.7 *50 34.2 22 4.5 66 13 50.1 *54.6 36.6 All table dimensions are measured from pivot to pivot. * Cut/add excess pipe for desired extension arm pivot to pivot dimension. ** Cut excess control arm extension and/or control arm hub assembly for desired pivot to pivot dimension. Weld or bolt extension arm to arm assembly. MANUAL DISCONNECT MODEL SW470 1. Remove the (2) black knobs securing the control arm to the operator (Figure 1). 2. Swing arm assembly off to the side. Gate should swing freely. Figure 1 Arm Channel MODEL SW490 1. Remove hitch pin and pivot pin securing control arm to arm assembly (Figure 2). 2. Swing arm assembly off to the side. Gate should swing freely. Housing Black Plastic Knob Hub Assembly Figure 2 Pivot Pin Assembly Extension Arm Holder Extension Arm Cotter Pin 14