TM 5-4240-5501-148PSTARTERSGear Drive 12V & 120VCAUTION: The test of this rectifier assembly requires theuse of a 120 volt AC circuit. Extreme care should beused when making this test to minimize the hazard ofelectrical shock.Solder the 10,000 ohm resistor to the DC internalterminals of the rectifier, as shown in the accompanyingillustration. Fig. 119.Fig. 119 - Checking Rectifier AssemblyConnect the DC volt meter between the rectifier fieldterminal and the brush terminal. Fig. 119.Measure the line voltage of the 120 volt AC outlet to beused. A rectifier assembly in good condition will bewithin the following specifications: 1. With the switch inthe off position, a zero reading should be observed onthe DC volt meter.2. With the switch in the on position, the DC volt meterreading should be 0 to 14 volts lower than the AC linevoltage measured previously.If the drop exceeds 14 volts, the complete rectifierassembly must be replaced, as individual parts for therectifier assembly are not available.ASSEMBLY OF STARTER MOTORSWhen all parts have been thoroughly inspected, lightlylubricate the bearings with #20 oil and reassemble in thefollowing manner. (Solder the field lead to the rectifierassembly and assemble the rectifier to the housing (120VAC motor). Fig. 120.Fig. 120 - Installing Rectifier to HousingInsert the brushes in their respective holders.NOTE: A tool such as shown in Fig. 45 should be usedto hold the brushes clear of the armature commutatorwhen assembling the commutator end cap to the motorhousing.Fig. 121 - Inserting BrushesFig. 122 - Installing End CapSlide the armature into the motor housing, being sure tomatch the drive end cap keyway to the stamped key inmotor housing. Assemble end cap, again matching thekeyway to key in housing. Care should be used toprevent damage to ceramic magnets where used.Assemble thru bolts, lockwashers and nuts.NOTE: THRU BOLTS AND NUTS MUST BE PLACEDIN THE SAME POSITION AS WHEN REMOVED ORINTERFERENCE MAY RESULT.After Hi-Pot test and assembly of the starter motor drive,the starter motor is now ready for installation to theengine.35
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