T M 5 - 6 1 1 5 - 5 8 5 - 1 2N A V F A C P - 8 - 6 2 3 - 12T O - 3 5 C 2 - 3 - 4 5 5 -1T M - 0 5 6 8 4 C / 0 5 6 8 5 B - 12(3) Connect voltmeter as shown in figure4–19, Test b. If battery voltage (24 volts) is not indi-cated, the starter (B1) may be defective. Proceed tostep (4).(4) Momentarily connect a jumper as shownin figure 4–19, Test b. Voltmeter reading should dropto zero and starter should crank engine. If voltmeterdoes not drop to zero, solenoid is defective. If voltme-ter reading does drop to zero but starter fails to crankengine, starter is defective.b. Removal (see figure 4–18). On ASK equippedgenerators remove batteries access door. Tag anddisconnect leads (1) thru (6). On Style I Starters, re-move nut (7), lockwasher(8), screw (9). Loosen but donot remove screw (10), Iockwasher (11) and swingsupport bracket (12) down and away from starter, OnStyle II Starter, support bracket is not fastened to thestarter, loosen screw (10), Iockwasher (11) and swingsupport bracket down and away.Support bracket and associated hard-ware must remain with engine at alltimes! It provides support for Style IStarters that may be used to replaceStyle II Starters during Operator andOrganizational maintenance.T hesupport bracket and associated hard-w a r e i s s u p p l i e d o n a l l e n g i n esmanufactured with either the Style I orStyle II Starters.Support starter (15) and remove screws (13), lockwashers (14) attaching starter to flywheel housing(17). Slide starter out of housing.c. Cleaning and Inspection of Starter Solenoid,Drive Assembly and Starter Brushes.(1) Cleaning Starter. Refer to paragraph3–16a.(2) Inspecting Solenoid Switch,(a) Style I Starter. Refer to figure 4-22.Inspect solenoid switch (1) for cracks, dents, or otherphysical damage. Check to see that the electrical ter-minals are clean and free of corrosion, Check that therubber boot (2) on plunger (3), cotter pin (4), clevis pin(5), and yoke (6) are in good condition. Check thatplunger (3) and yoke (6) operate freely. Check that so-lenoid switch (1) is securely fastened to the startermotor (8), with screws (14).(b) Style II Starter. Refer to figure 4-22A.Inspect solenoid switch (3) for cracks, dents, or otherphysical damage. Check to see that the electrical ter-minals are clean and free of corrosion. Check thatsolenoid switch (3) is securely fastened to the startermotor (4), with screws (1).(3) Inspecting Drive Assembly. Refer to fig-ure 4–22 for Style I Starter and figure 4–22A for Style IIStarter. Inspect drive gear for cracks or chipped teeth.Check that gear and spring of drive moves freely, andreturns to rear position when released.(4) Inspecting Brushes.(a) Style I Starter. Refer to figure 4-21.Remove two through bolts (1) and lift end plate (2)away from frame. Lift brush tension springs (3) and lifteach brush (4) from holder for inspection. Check brushface for deep surface pits, cracks, or excessive chip-ping. Measure brush length. See figure 4–21. Whenbrush is worn to length less than 1/4 inch, notify higherlevel maintenance for replacement of brushes (4).Clean area around brushes and commutator and drywith low pressure compressed air. Lift brush springs(3) and insert brushes (4) in brush holder. Repositionend plate (2) on frame and insert and tighten throughbolts (1) securely.(b) Style II Starter. Refer to figure 4-21A.Remove two nuts (1) and flat washers (2), lift off termi-nal assembly (3). Remove the two through studs (4),screws (5) and carefully lift off cover (6), leaving thebrush holder (7) in place on the armature commutator.Lift brush tension springs (8) and lift each brush (9)from holder for inspection. Check brush face for deepsurface pits, cracks, or excessive chipping. Nextmeasure brush length. See figure 4–21A. When brushis worn to length less than 11.0 mm (0.433 inch), re-placement is required. When Negative brushes areworn, replacement is by installing a new brush holder(7) which includes these brushes. When the Positivebrushes are worn, replacement in by installing a newstator (10). Individual brushes are NOT available forreplacement. Clean area around the brushes andcommutator with dry and low pressure compressed air.Lift brush springs (8) and inserft brushes (9) in brushholder(7). Reposition cover (6), fasten screws (5), in-sert through studs (4) and tighten securely. Placeterminal assembly (3) on studs and fasten with flatwashers (2) and nuts (1). Tighten securely.4 - 28Change 11
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business