SECTION XV. GENERATOR SET CONTROLS3-99. General.Theengine generator set control assembly consistsof a wiringharness, and an enginegeneratorcontrolpanelassembly. Thegenerator control panelassem-blyprovides a means of controlling enginegeneratoroperation.3-100. DC Control Circuit Breaker.a. Test.—(1)Depress circuitbreaker (27, fig. 3-17)to insure that it is in theresetposition (flush topanel).(2)Remove screwandlockwasher whichse-cure leadsto one terminal of circuitbreaker.(3) With an ohmmetertestcircuitbreaker forclosedcontacts.If meter shows an opencircuit, re-place circuitbreaker.b. Replacement. Replace defective DC CONTROLCI~CUfT BREAKER(27)as follows:(1)Removal.(a)Tagleadsandremove screwsandlock-washers wlichsecureleadsto DCCONTROLCIRCUITBREAKER.(b)Remove DCCONTROLCIRCUITBREAK-ER mount~~ hardware andremove circuitbreaker.(2)Installation.InstallDC CONTROL CIRCUITBREAKERusingremoval steps in reverse order.Remove tags.3-101. Wiring Harness Replacement.Seefigure 3-17 andremove wiringharnesses (1 and2) as follows:a. Unpluganddisconnect wiringharnesses atterfiinations.Tagall connectors andelectricalleadsto assure position identification duringreplace-ment.b. Seedetail A of figure 3-17, andremove allscr;ws(3),nuts(4) andclamps (5)securing wiringharnesses in position.c. Installnew or repaired wiringharnesses inrev<rsesequence of removal.3-102. Manual Speed Control.a. Inspection. Inspectthrottle andgovernorliti-~es for loose mounting, loose connections, andloose linkage.b. Test. Checkthatthethrottle andgovernorli&~esmotionis smooth andunrestricted. A90-degree rotation of the manualspeedcontrolknobshallprovide a linearcablemovementof0.036 + 0.005 inch.—c.Replacement.—(1)Disconnect negativeleadfromthebattery.On Class 1 sets,remove screws (11, fig. 3-17) whichsecurescover(12)andremove cover.(2) Seedetail B andremove manualcontrolassembly (21) by loosening screw (13)andremovingnut(16),washer (1 7),nut (18),nut(19)andwasher(20).3-103.FaultIndicator.Seefigure 3-17 andproceed as followsa. Inspection. Inspect FAULTINDICATORpanel(10~forcracks,Iireaks, andotherdamage.b. Testing.Test the fuseas describedbelow:—(1)OpenDCCONTROL CIRCUITBREAKER(27, fig. 3-17).(2) Unscrewfuseholdercap(24),andremovefuse(25).(3)Usingohmmeter, check thatcontinuityexiststhroughfuseandopencircuitis not in effect.(4)Installexisting fuse, or replacement fuseas necessary,andreplace fuseholdercap(24).(5)Remove the harness plugfromthe backofthe faultindicator control box.Apply24 Vdcto pins12-A(positive) and12-Bof thefaultindicator recep-tacle.(6)SequentiallyjumppinC of thefaultindicatorreceptacleto the pins listed in table 3-2 of thefaultindicator receptacle.Thelightthatcorrespondstotheparticular faultopposite thepinnumbers shouldlightandstaylit.Reset thelights withtheTESTORRESETswitch beforeproceeding to the nextset ofpins. If the correctlightdoesnot lightup or if an in-correctlightlights, thefaultindicator control boxmustbe replaced.Replacement.Seefigure 3-17 to remove andins&HFAULT INDICATOR panel (10).d. Lamp and Fuse.To replace indicator lamp andfus~, see detail C of figure 3-17 and proceed as follows(1) Unscrew lens (22) and remove lamp (23).Change 13-37
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