Guardian Technologies 5308, 4583 Test 36 Test Fuel Shutoff Solenoid FSS, Test 38 Check Fuel Pump

Page 59

Section 6

DIAGNOSTIC TESTS

9.Now check the flywheel magnet by holding a screwdriver at the extreme end of its handle and with its point down. When the tip of the screwdriver is moved to within 3/4 inch (19mm) of the magnet, the blade should be pulled in against the magnet.

10.Now check the flywheel key. The flywheel’s taper is locked on the crankshaft taper by the torque of the flywheel nut. A keyway is provided for alignment only and theoretically carries no load.

Note: If the flywheel key becomes sheared or even partially sheared, ignition timing can change. Incorrect timing can result in hard starting or fail- ure to start.

RESULTS:

If sparking still does not occur after adjusting the armature air gap, testing the ground wires and per- forming the basic flywheel test, replace the ignition magneto(s).

0.008-0.012" GAUGE

(0.203-0.304 mm)

MAGNETO

Figure 6-49. – Setting Ignition Magneto (Armature)

Air Gap

TEST 36 - TEST FUEL SHUTOFF SOLENOID

(FSS)

PROCEDURE

1.Disconnect Wire 16 from the Starter Contactor (SC) located on the starter motor.

2.Remove the air cleaner cover.

3.Place the Start-Run-Stop Switch (SW1) to STOP then to START. When SW1 is activated a click should be heard and or activation of the Fuel Shutoff Solenoid should be felt. It can then be assumed that the Fuel Shutoff Solenoid is functioning.

RESULTS:

Refer to flow chart.

TEST 37: TEST FUEL SHUTOFF SOLENOID

VOLTAGE

PROCEDURE:

1.Set a voltmeter to measure DC voltage.

2.Disconnect the two pin connector from the Fuel Shutoff Solenoid (FSS).

3.Connect the positive meter test lead to the red wire. Connect the negative meter test lead to the black wire. Place the Start- Run-Stop switch (SW1) to START. During cranking, 12 VDC should be measured. If DC voltage is not measured continue testing.

4.Set a voltmeter to measure resistance.

5.Connect one meter test lead to the black wire. Connect the other meter test lead to frame ground. Continuity should be measured. If continuity is not measured repair or replace the black ground wire or correct poor ground connection.

6.Set a voltmeter to measure DC voltage.

7.Remove Wire 14 from the Start-Stop Relay (SSR). Refer to Figure 6-41 on Page 54. Connect the positive meter test lead to the terminal of the SSR that Wire 14 was just removed. Connect the negative meter test lead to frame ground. Place the Start-Run-Stop Switch (SW1) to the start position. 12 VDC should be measured. If 12 VDC is measured repair or replace Wire 14 between the SSR and Resistor 1 or between Resistor 1 and the FSS.

RESULTS:

Refer to flow chart.

TEST 38 - CHECK FUEL PUMP

FUEL PUMP

FUEL TO

CARBURETOR

PULSE LINE

FUEL FROM TANK

Figure 6-50. – Fuel Pump and Fuel Lines

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Contents Diagnostic Repair Manual Replacement Parts SafetyTable of Contents Section Disassembly and Exploded Views 66-71 Electromagnetic Induction MagnetismElectromagnetic Fields More Sophisticated AC Generator STATORs AC power windingsSimple AC Generator Generator Operating Diagram Measuring DC Voltage MetersMeasuring AC Voltage VOMMeasuring Resistance Measuring CurrentOhms Law Electrical UnitsEngine-Generator Drive System Rotor AssemblyIntroduction AC Generator Excitation Circuit Breaker Stator AssemblyBrush Holder and Brushes Other AC Generator ComponentsVoltage Regulator Underfrequency Adjust162 Operation Rotor Residual MagnetismField Boost Circuit Stator Insulation Resistance Test Insulation ResistanceMegohmmeter Test Between Windings Testing ALL Stator Windings to GroundDrying the Generator Cleaning the GeneratorRotor Insulation Resistance Test Circuit Board Connections BatteryRecommended Battery Printed Circuit BoardENGINE DC CONTROL Control Panel Component IdentificationTerminal Block Terminal BLOCKTB2 TB1 C1 Female Side C1 Male SideC2 Female Side C2 Male Side 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 Introduction If Problem Involves AC OutputProblem 1 Voltage & Frequency Are Both High or Low 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 14 Engine Hunts / Erratic Idle Problem 11 Unit OverspeedsProblem 12 Idle Control RPM Does Not Decrease Results ProcedureTest 1 Check No-Load Voltage Frequency Test 2 Check Main Circuit BreakerSet voltmeter to measure AC voltage Test 4 Fixed Excitation Test Rotor AMP DrawIf circuit breaker is good, go on to Test 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 & AmperageDisconnect all wires from the Battery Charge Rectifier Test 17 Check Battery Charge OutputTest 19 Check Battery Charge Rectifier BCR2 BCR1BCR2 Test 22- Check Battery & CablesTest 21- Check 10 Amp Fuse 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 switchTest 30 Check Spark Plugs Refer back to the Flow ChartTest 29 Check Ignition Spark 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 WireMagnetos Test 34 Test Start Stop Relay WiringTest 35 Check and Adjust Ignition Magneto Test 36 Test Fuel Shutoff Solenoid FSSTest 37 Test Fuel Shutoff Solenoid Voltage Test 38 Check Fuel PumpTest 39 Check Carburetion Test 40 Valve AdjustmentAdjusting Valve Clearance 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 Frequency Hz 238-242 59-61 100 Rated Max DC Load Amperes Current @ 12 VoltsLoad % Trim Torque Specifications Torque SpecificationsPO BOX 297 WHITEWATER, WI

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

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