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11(a) Distance between gateand limit switch sensor:1 3/8 in. (3.6 cm)2 3/8 in. (6 cm) betweenthe bottom of the operatorand ground level2 3/8 in. (6 cm) between the edge ofthe gate and the body of the operator(not the surface of the pinion)4 3/4 in. (12.1 cm) betweenthe top of the rack and thebottom of the 844 OperatorDistance between limit switch plateand limit switch sensor:3/16 in. (0.5 cm) maximum(b)GateOutsideInside1 3/8 in.(35mm)Chain bracket(2 required)U Bolt(2 required)ChainFigure 7. Mounting the operator: (a) side view of rack and pinion version and (b) top view of chainversionInstalling the Rack: Manually disengage the operatormotor using the Manual Release (see Figure 2) andopen the gate by hand as far as possible. Fit the spacers,washers and bolts on the rack sections as shown inFigure 9. The bolts should be centered in the slots of therack sections.With the gate in the fully open position, lay a section ofrack on the pinion. Engage the teeth properly and makesure that the end of the rack is even with the end of thegate and that the rack is level. Spot weld to the gate thespacer that is nearest the pinion.Pull the gate toward the closed position until the pinionis directly under the spacer on the opposite end of therack section and spot weld that spacer. Next you canspot weld the center spacer.Idler sprocketDrive sprocketChainFigure 8. Install the chain around the sprocketsUpswung.com |
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