－ 31 －－ 30 －Assembling of gear headAssembling of gear head• Preparation for assembling[1] Gear head applicable to the motor described in this instruction manual is MB8G □ BV(for 50W) and MB9G □ BV (for 90 W and 130 W). Never use a combination of gearheads other than applicable ones. Failure to observe this instruction will result inmalfunction.[2] Make sure that O-ring is attached to the bottom of spigot joint.When the gear head is assembled with O-ring floating, it may result in grease leakage.[3] When grease adheres to the end surface of gear head, wipe off clean.If the gear head is assembled with grease adhered, it may cause grease to exude.• Assembling[1] Direct the motor pinion upward, and make sure that the relation between direction ofmotor lead wire and output shaft matches with the equipment.[2] Turn the motor pinion finely clockwise and counterclockwise for assembling, ensuringthat the tip of motor pinion does not hit the tooth of gear head.MB type gear head is provided with temporary assembling screw (two hexagon sock-et head bolt). Before installing the equipment, assemble the motor and gear headtemporarily, which will ensure stable installation of the equipment. In installing to theequipment, be sure to use four “mounting screws” attached to the gear head for se-cure installation.[Recommended tightening torque for temporary assembling]Size Gear headtypeScrewsizeTighteningtorqueScrewlength80 mm sq. MB8G M2.6 0.5 N・m 12 mm90 mm sq. MB9G M3 0.8 N・m Temporaryassemblingscrew[3] When installing the motor and gear head to the mating equipment, use “mountingscrews” attached to the gear head, tighten them sufficiently to eliminate clearancebetween the motor flange surface and gear head spigot joint while paying attention tobite of O-ring.Recommended tightening torque is shown below:Size Gear headtypeScrewsizeTighteningtorqueAttachmentpitch80 mm sq. MB8G M6 2.9 N・m 94 mm90 mm sq. MB9G M8 7.8 N・m 104 mm• Assemble with motor pinion faced up.• Outward direction of motor leadwire can bealigned with any one of 4 sides of gear headwith an output shaft at a different position.Faucetportionend faceOutput shaftFaucet faceO-ringMotor pinionLeadwires Flange faceTemporaryassembling screwMaintenance/ InspectionsMaintenance/ InspectionsRoutine maintenance and inspection are essential for proper and satisfactory operation ofthe motor.Maintenance/ Inspection itemMaintenance/Check itemInspectionprocedure ConditionInput voltage Voltmeter Must be within ±10% of rating.Input current Ammeter Must be within rated input current described on nameplate.InsulationresistanceInsulationresistancetesterThe resistance of motor should be 1 MΩ or higher when testedwith a 500 V megger.Measuring position:Between power input line (L1, L2,L3) and grounding wireBrushless motor:Across phase (U, V, W) and ground terminalsNoise Hearing Noise level must not be different from the usual level. In addition,abnormal noise such as rumbling noise must not be heard.Vibration By hand Free from abnormal vibration.Greaseleakage Visual checkCheck that circumference of the motor and gear head are freefrom oil and grease.If grease leakage will cause problem, use grease sealing cover.InstallationboltTorquewrenchCheck for loosening of bolt, and tighten additionally asnecessary.Useenvironment By sightCheck the ambient temperature and humidity, and make surethat dirt, dust, or foreign substance is not found.Check the waste thread etc don’t attached to the windhole ofbrushless amplifier.Caution• Power-on/off operations should be done by the operators themselves for ensuring safetyin checking.• Do not touch the motor while it is running or immediately after it stops because it gets hotand stays hot for a while after power has been turned off.• When testing the insulation resistance of the brushless amplifier with the megger, discon-nect the amplifier from all associated devices. Performing megger testing without firstdisconnecting these devices will cause failure.When disassembly, troubleshooting, etc., is needed,be sure to contact our service department or the sales agent of purchase.
