5Unpacking the OperatorComplete the following steps to unpack the operator.1. Before you remove the operator from the carton,check for any physical shipping damage, such as atorn shipping carton or leaking oil. Inspect theoperator carefully after removing it from the carton.Notify the carrier immediately if you note anydamage because the carrier must witness the damagebefore you can file a claim.2. As you unpack the operator, insure that all parts areincluded. The package should contain all the itemslisted in the Parts List for your particular operator.3. Remove the vent screw from the operator beforeapplying power (see Fig. 1). Be sure to save the ventscrew for possible future use because the screwshould be installed if you transport the operator.Caution: The vent screw must be removed beforeyou start the operator.4. Remove the top cover of the operator using a 3-mmAllen wrench. Remove and discard the specialStyrofoam block resting on the transformer in thecenter of the control panel (see Fig. 12 for thetransformer location on the control panel).5. Remove the oil plug (see Fig. 1) with a 17-mmwrench and check for the proper oil level. The oilshould be just slightly above the silver armature plate,located below the copper motor windings as viewedthrough the oil filler hole.6. At this time remove the rubber cover from theManual Release mechanism protruding from the sideof the operator (see Fig. 1). Keep track of the rubbercover because you will replace it at the end of theinstallation process if you are not using a locking cap.You are now ready to begin the actual installation of theoperator (see page 9).Parts List for the Chain Operator1 746 operator (equipped with chain drive mechanism);the cover is attached with 2 (of 4) 3-mm Allen-headbolts; mounting brackets are attached1 746 foundation plate (optional; this part must beordered separately)1 Z20 sprocket1 Hardware package that contains the following:1 5 mm bolt with flat washer1 Manual Release lever2 Limit switch plates, each is 2-1/8 × 3-1/2 in. (54× 89 mm)4 Rubber weather plugs for top cover hold downbolts1 Top cover gasket2 3-mm Allen-head bolts1 Chain mounting kit with the following:2 Chain tension adjustment bolts, each with 3 nutsand 1 locking washer2 Chain tension adjustment bolt mounting bracketswith 4 clamps1 Idler assembly kit with the following:1 Chain guard with 1 bolt and flat washer formounting1 Idler mounting bracket with 5 longer mountingbolts and 1 mounting stud for the chain guard2 Idler sprockets with 2 snap rings for mounting2 Rack limit switch plates with 4 mounting boltsand lock washers2 (Optional) Bolt-on operator mounting bracketswith 4 bolts, 4 washers, 4 lock washers, and 4nutsParts List for the Rack andPinion Operator1 746 operator (equipped with rack and pinion drivemechanism); cover is attached with 2 (of 4) 3-mmAllen-head bolts; mounting brackets are attached1 746 foundation plate (optional; this part must beordered separately)1 Z20 pinion1 Hardware package that contains the following:1 Manual Release lever2 Limit switch plates, each measures 2-1/8 × 3-1/2in. (54 × 89 mm)4 Rubber weather plugs for top cover hold downbolts1 Top cover gasket2 3-mm Allen-head bolts