Guardian Technologies 5308, 4582 & 4987, 4451 & 4986 Test 23 Check Voltage at Starter Contactor SC

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Section 6

DIAGNOSTIC TESTS

measure at the battery terminals during cranking. If battery voltage is below 11 volts DC, recharge/replace battery. If bat- tery or cables are still suspected, connect an alternate battery and cables to the generator and retest.

2.Use a battery hydrometer to test the battery for (a) state of charge and (b) condition. Follow the hydrometer manufacturer's instructions carefully.

RESULTS:

1.Clean battery posts and cables as necessary. Make sure bat- tery cables are tight.

2.Recharge the battery, if necessary.

3.Replace the battery, if necessary.

4.If battery is good, but engine will not crank, refer back to Flow Charts.

TEST 23 - Check Voltage at Starter

Contactor (SC)

PROCEDURE:

1.Set voltmeter to measure DC voltage.

2.Disconnect Wire 16 from the Starter Contactor located on the Starter motor.

3.Connect the positive meter test lead to Wire 16 previous- ly removed. Connect the negative meter test lead to frame Ground.

4.Place the Start-Run-Stop Switch to Start. 12 VDC should be measured.

5.Reconnect Wire 16 to the Starter Motor.

RESULTS:

Refer back to flow chart.

Test 24 - Check Starter Contactor (SC)

PROCEDURE:

1.Carefully inspect the starter motor cable that runs from the Battery to the Starter Motor. Cable connections should be clean and tight. If connections are dirty or corroded, remove cable and clean cable terminals and studs. Replace any cable that is defective or badly corroded. Set the voltmeter to mea- sure DC voltage. Connect the positive (+) meter test lead to the Starter Contactor stud that the battery cable is connected to. Connect the negative (-) meter test lead to a clean frame ground. Battery voltage should be measured (see Figure 6-28,

STEP 1 TEST POINT).

 

STARTER

16

 

 

 

SWITCH

50

 

 

BATTERY

30

 

12V

 

 

CONNECTING

DIAGRAM

 

PERMANENT MAGNET

STARTER

step 1

TEST POINT

CONTACTOR

 

 

step 2

 

TEST POINT

STARTER

 

MOTOR

 

Figure 6-28. – The Starter Contactor (SC)

2.Set the voltmeter to measure DC voltage. Connect the positive

(+)meter test lead to the Starter Contactor stud that has the small jumper wire connected to the Starter. Connect the nega- tive (-) meter test lead to a clean frame ground. Set the Start- Stop Switch to Start. Battery voltage should be measured (see Figure 6-28, STEP 2 TEST POINT).

RESULTS:

1. If battery voltage was not measured in Step 1, repeat Test 22.

2If battery voltage was measured in Step 1, but not in Step 2, replace the Starter Contactor.

4.If battery voltage was measured in Step 2 but the engine still does not crank, refer back to the Flow Chart.

Test 25 - Check Starter Motor

Conditions Affecting Starter Motor Performance:

1.A binding or seizing condition in the Starter Motor bearings.

2.A shorted, open or grounded armature.

a.Shorted, armature (wire insulation worn and wires touching one another). Will be indicated by low or no RPM.

b.Open armature (wire broken) will be indicated by low or no RPM and excessive current draw.

c.Grounded armature (wire insulation worn and wire touching armature lamination or shaft). Will be indicated by excessive current draw or no RPM.

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Contents Diagnostic Repair Manual Replacement Parts SafetyTable of Contents Section Disassembly and Exploded Views 66-71 Magnetism Electromagnetic FieldsElectromagnetic Induction STATORs AC power windings Simple AC GeneratorMore Sophisticated AC Generator Generator Operating Diagram Measuring DC Voltage MetersMeasuring AC Voltage VOMMeasuring Resistance Measuring CurrentOhms Law Electrical UnitsRotor Assembly Introduction AC GeneratorEngine-Generator Drive System Excitation Circuit Breaker Stator AssemblyBrush Holder and Brushes Other AC Generator ComponentsUnderfrequency Adjust 162Voltage Regulator Rotor Residual Magnetism Field Boost CircuitOperation Insulation Resistance MegohmmeterStator Insulation Resistance Test Test Between Windings Testing ALL Stator Windings to GroundCleaning the Generator Rotor Insulation Resistance TestDrying the Generator Circuit Board Connections BatteryRecommended Battery Printed Circuit BoardENGINE DC CONTROL Control Panel Component IdentificationC1 Female Side C1 Male Side C2 Female Side C2 Male SideTerminal Block Terminal BLOCKTB2 TB1 Page Circuit Condition Rest = 12 VDC Control Circuit Condition Start IM1 SP1 IM2 SP2 RED Black Battery Circuit Condition RUN = Idle Control Transformer Output CIRcUIT Condition Stop Fault Shutdown If Problem Involves AC Output Problem 1 Voltage & Frequency Are Both High or LowIntroduction Or Replace If BAD Load Watts Problem 5 No 10A Battery Charge Output Problem 4 No Battery Charge OutputProblem 6 Engine Will Not Crank Problem 7 Engine Cranks But Will Not Start Problem 9 Engine Starts Then Shuts Down Problem 8 Engine Starts Hard and Runs RoughProblem 10 10 Amp Fuse F1 Blowing Problem 11 Unit Overspeeds Problem 12 Idle Control RPM Does Not DecreaseProblem 14 Engine Hunts / Erratic Idle Results ProcedureTest 1 Check No-Load Voltage Frequency Test 2 Check Main Circuit BreakerTest 4 Fixed Excitation Test Rotor AMP Draw If circuit breaker is good, go on to TestSet voltmeter to measure AC voltage Refer to Test 4 Results chart AC Voltage across Wires 11S and 44S=Set a voltmeter to measure resistance Remove air cleaner cover to access stepper motorTest 7 Check Field Boost Test 6 Wire ContinuitySet volt meter to measure resistance Disconnect both wires from the Resistor R1Test 8 DIODE/RESISTOR Set volt meter to the diode test rangeTest 9 Test Stator From the 50 Amp receptacle disconnect WireTest 10 Sensing Leads Unplug the six pin connector at the Voltage RegulatorTest 13 Check Brushes & Slip Rings Test 11 Excitation WiringGain access to the brushes and slip rings Test 12 Check Brush LeadsIf the unit is overloaded, reduce the load Test 14 Check Rotor AssemblyTest 15 Check Load Voltage Frequency Test 16 Check Load Watts & AmperageTest 17 Check Battery Charge Output Test 19 Check Battery Charge Rectifier BCR2Disconnect all wires from the Battery Charge Rectifier Test 22- Check Battery & Cables Test 21- Check 10 Amp FuseBCR1BCR2 Test 25 Check Starter Motor Refer back to flow chartTest 23 Check Voltage at Starter Contactor SC Test 24 Check Starter Contactor SCTools for Starter Performance Test Checking the PinionSet voltmeter to measure DC voltage Test 26 Test Starter Contactor Relay SCRProcedure Set voltmeter to measure resistance Test 27 Check Start-Run-Stop Switch SW1Test 28 Check Start-Run-Stop Switch SW1 Wiring Reconnect all wires to the switchRefer back to the Flow Chart Test 29 Check Ignition SparkTest 30 Check Spark Plugs Test 32 Test Start Stop Relay SSR Test 31 Remove Wire 18 / Shutdown LeadRefer to Flow Chart SSR and the Battery Charge Rectifier 2 BCR2RUN Test 33 Test WireTest 34 Test Start Stop Relay Wiring Test 35 Check and Adjust IgnitionMagnetos Magneto Test 36 Test Fuel Shutoff Solenoid FSSTest 37 Test Fuel Shutoff Solenoid Voltage Test 38 Check Fuel PumpTest 40 Valve Adjustment Adjusting Valve ClearanceTest 39 Check Carburetion 52 Tightening the Jam Nut Adjust the regulated pressure on the gauge to 80 psiTest 43 Check Start Stop Relay SSR Test 42 Check Oil Pressure Switch WireTest 47 Check Fuel Shutoff Solenoid Test 45 Check Wire 15 CircuitTest 46 Check Wire 14 Circuit Test 44 Test Starter Contactor Relay SCRTest 48 Check Hourmeter Test 50 Check WireTest 49 Check Wire 15B Test 51 Check Wires 11S & 44STB2 Test 52 Check Idle Control SwitchTest 53 Check Idle Control Wiring SW2Test 54 Check Idle Control Transformers ICT Test 55 Check TR1 & TR2 WiringContinuity should be measured Test 56 Choke TestRemove air deflector Figure B, Item #45 from cross member Major DisassemblySupport Alternator 3317 3026 20 22 25 QTY Description Detail of Battery Tray QTY. Description ELECTRICAL DATA RED Battery Charge Winding BA Brush Assembly Governor Actuator 167 229 15B Power Winding DPE Winding SCR Wiring Diagram 17.5 kW Drawing No G0731 Stator Closest to Bearing Electrical Schematic 17.5 kW Drawing No G0733 Circuit 11 ORG Circuit 13 DRK BLU Circuit 15 PNK ELECTRICAL DATA Page Rated Max DC Load Amperes Current @ 12 Volts Load %Frequency Hz 238-242 59-61 100 Trim Torque Specifications Torque SpecificationsPO BOX 297 WHITEWATER, WI

5308, 4583, 4451 & 4986, 4582 & 4987 specifications

Guardian Technologies has carved a niche in the market with its innovative air purification and UV-C sanitization products. The company's model numbers, including 4582, 4987, 4451, 4986, 4583, and 5308, represent a diverse range of solutions designed to enhance indoor air quality and safety in both residential and commercial settings.

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