FAAC 750 Standard Installation Manual

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Contents

13screw. This connection insures that the green valvecontrols opening pressure.Caution: Do not remove and do not tighten theelbow-shaped pipe fittings on the power unit.They have been locked into position with athread locker to help seal the hydraulic system.Synchronize theHydraulic SystemNext you need to disengage the hydraulic system inorder to synchronize it.Inside the power unit is the Manual Release lever thatdisengages the hydraulic system (see Figure 1). MakeFigure 8. Connect the hydraulic line to thepower unit. See the technical drawing on thenext to last page for more information.sure the Manual Release lever is turned toward you anddown to disengage the hydraulic system.Now you can synchronize (set) the hydraulic system tothe closed position by turning the splined shaft in theclosing direction. Turn the shaft as far as it will go. Toprevent the piston in the drive unit from bottoming in itscylinder, next turn the splined shaft about 5 deg in theopening direction.The position of the shaft now corresponds to the fullyclosed position of the gate leaf. The hydraulic system isnow synchronized (set).Caution: The splined shaft must not be movedfrom its closed position until the gate leaf shoethat holds the gate leaf has been attached.Install the Gate Leaf ShoeIf the vertical distance between the finished grade underthe gate and the bottom of the gate leaf is more than1 1/4 in. (see Figure 5), you need to do one of thefollowing:• Install a length of appropriately sized pipebetween the sleeve that fits around the splinedshaft of the operator and the gate leaf shoe.• Construct a shear-pin assembly toaccommodate the extra vertical distance. Theassembly is welded to the bottom of the gateleaf shoe on one end and to the sleeve for thesplined shaft of the pinion on the other end(see Figures 9 and 10). Such an assemblyrequires a bottom hinge and also protects thepinion and splined shaft in the event somethinghits the gate with great force.Weld this end of this pipe tothe bottom of the gate leafshoe, being certain you havealigned the axes of rotation.This 2 in. pipe (schedule 160)has an inside diameter of 1.689 in.Weld this end of this pipe to thesleeve for the splined shaft (do notweld anything to the splined shaftitself). This 1 1/4 in. pipe (schedule160) has an outside diameter of1.660 in.Axis of rotation of the gate leafBolt or shear pin goesthrough these holes andthe holes on the oppositesides of the pipes.Figure 9. A sample shear-pin assemblyInstalling the gate leaf shoe involves making the gateleaf shoe, positioning it, and welding it to the splinedshaft sleeve. If you are retrofitting the 750 Operator toan existing gate, these tasks require you to remove thegate leaf from its hinges. If you are using a shear-pinassembly, refer to Figures 9 and 10 to determine whatyou should weld together.The gate leaf shoe is designed to carry the weight of thegate leaf and transfer the weight to the splined shaft.The shoe surrounds the 90-deg gate-post corner of thegate leaf to carry the gate and to act as a lower hinge.The shoe is made of a U-shaped section and a verticalsection (see Figure 10). Later you will weld the bottomof the U-shaped section to the sleeve for the splinedshaft (or to the shear-pin assembly, which is welded tothe sleeve).Since the gate leaf shoe holds the gate leaf, bothsections must be made of steel at least 1/4 in. (0.6 cm)