FAAC 746 Installation Manual

Also see for 746 ER CAT: Instruction manual Manual

Contents

10Rack and Pinion OperatorMounting the Pinion: As shown in Figure 7, place theoperator on the foundation plate with the pinion facingthe gate and with approximately 1-3/8 in. (35 mm)between the inside edge of the gate frame and the centerof the drive pinion.While placing the operator on the foundation plate,thread the electrical wiring through the conduit in theoperator as shown in Figure 5.Fit one 1/16-in. (1.5 mm) thick sheet-metal shim undereach mounting bracket in order to keep theoperator slightly raised. These shims are setting theheight of the rack and will be removed later to provideoperating clearance between the rack and the pinion.Spot weld the factory-fitted mounting brackets to thefoundation plate as shown in Figure 8. (You willremove these spot welds later, so do not over weld.)Installing the Rack: Manually disengage the operatormotor with the Manual Release (see Fig. 2) and openthe 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 ofthe rack sections.With the gate in the fully open position, lay a section ofrack on the pinion. Engage the teeth and make sure thatthe end of the rack is even with the end of the gate andthat the rack is level. Spot weld the spacer that is nearestthe pinion to the gate.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.Now place another rack section end next to the end ofthe rack just installed. Be sure that the two sections arealigned and level and that the teeth match perfectly. Useanother piece of rack, upside down, to check and set thealignment of the teeth as shown in Figure 10.Repeat the process of spot welding the spacers of thisrack section as you did on the first section. Continuethis process for each section of rack.GateOutsideInside1 3/8 in.(35mm)Chain bracketU Bolt(2 req.)(2 req) ChainFigure 4. Mounting the chain operator, top viewFigure 5. Thread the electrical wiring upthrough the operator in the conduit providedIdler sprocketDrive sprocketChainFigure 6. How to install the chain around thesprockets