3 - 7 2 . E n g i n e C r a n k s B u t W i l l N o t S t a r t o r S t a r t sa n d R u n s E r r a t i c a l l y o r M i s f i r e s .( C o n t )TroubleClogged airfilter.Defective fuel selectorvalve,3 - 7 3 .Expedient RemedyIf repaired fuel line leaks,shutdown engine.Shut down engine and re-move filter element ( f i g .3 - 5 ) . Use compressed air,if available, or shake vigorously, to clear obstruction.Reassemble andcontinueoperation until replacementpartsare obtained.Shut down engine anddis-connect fuel selector valve( p a r a 3 - 1 6 6 ) . Connecthoseassembly ( 2 1 , f i g .3 - 2 8 ) directly to hose as-sembly (24). Use hoseassembly (15)connectionand plastic electrician’stape as necessary to comp-lete connection. Keep moni-toring reconnected fuel linewhile engine is operatinguntil a replacement fuelselector valve is obtained.If reconnected fuel line leaks,shut down engine.E n g i n e S h u t s D o w n and L O W O I L P R E S S U R EI n d i c a t o r L i g h t s .TroubleExpedient RemedyDefective oil line.Tightly wraparea of oil lineleak with plastic electrician’sTrouble3 - 7 4 . B a t t e r y C h a r g i n gTroubleBattery charging alter-nator defective.Expedient Remedytape. Keep monitoring re-paired line while engine isoperating anda replacementoil line is obtained.A m m e t e r S h o w s N o C h a r g e .Expedient RemedyContinue engine operationwithdefective battery charg -ingalternator installed untilreplacement is obtained oruntil engine can be shut downforbattery charging alter-nator service or repair.3 - 7 5 . L o s s o f F r e q u e n c y C o n t r o l ( C l a s s 1 S e t s O n l y ) .TroubleExpedient RemedyGovernor system failsShut down the engine genera-to operate properly.tor set and disconnect plugsJ17 and J21 on the electricalgovernor control ( f i g . l - l ) .Remove cover ( 1 2 , f i g . 3 - 1 7 ) .Loosen screw (13)andmovefuel pump lever all the wayforward and tighten screw,Move actuator linkage to theretracted position. Operateset as class 2 unit until faultin governor system can becorrected.NOTEIf actuator linkage does not re-main in retracted position dis -connect actuator linkage andwire arm ( 3 , f i g , 3 - 3 2 ) in thedownposition ( f i g . 3 - 1 0 ) .S e c t i o n V I I . R A D I O I N T E R F E R E N C E S U P P R E S S I O N3 - 7 6 . G e n e r a l M e t h o d s U s e d t o A t t a i n P r o p e rS u p p r e s s i o n .Essentially, suppression is attained by providing alow resistance path to groundforthe stray currents.The methods used include shielding high frequencywires, grounding the frame with bonding straps,and using capacitors,inductors and resistors.3 - 7 7 . I n t e r f e r e n c e S u p p r e s s i o n C o m p o n e n t s .a. Primary Suppression Components. Thepri%ary suppressioncomponents are those whosefunction is to suppressradio interference. Theexciterregulator contains an ElectromagneticInterference (EMI) suppression assembly to suppressEMI from this assembly. The fuel pumps, main accontactor, daytank solenoidvalve, battery charg -ingalternator and load bank (if installed) containprimary suppressioncomponents.3 - 2 8b. Secondary Suppression Components. Thesecomponents have radio interference suppressionfunctions which are incidental or secondary to theirprimary function. No secondarv suppression compo-nents are included on this generator set,3 - 7 8 . R e p l a c e m e n t o f S u p p r e s s i o n C o m p o n e n t s .a.Fuel Pumps.Replace fuel pumpswith integralrad<o interferencesuppression components as des -cribed in p a r a g r a p h 3 - 1 6 5 .b. Battery Charging Alternator. Replace the—alternatorwith integral RFIsuppression diodesasdescribed in p a r a g r a p h 3 - 1 8 4 .c. Load Bank. RFIsuppression capacitors C301thr~ugh C306 ( f i g . 4 - 1 4 ) are replaced in the LoadBank as described in p a r a g r a p h 4 - 3 8 .
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