Onan JB Series Operator'S Manual Download Page 1 | Manualshive

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Summary of Contents for JB Series

Page 1: ...I CfD00D 2Z Z C OPERATOR S MANUAL I FOR JB SERIES ELECTRIC GENERATING SETS FORM NUMBER 967 0123 ISSUE DATE Spec AA Printed in U S A 2 77 ...

Page 2: ...amp clothing particularly wet shOes or allow skin surfaces to be damp when handling elec trical equipment Jewelry Is a good conductor of electricity and should be removed when working on electrical equipment Always use an appropriately sized approved double throw transfer switch with any standby generator set DO NOT PLUG PORTABLE OR STANDBY SETS DIRECTLY INTO A HOUSE RECEPTACLE T O PROVIDE EMERGEN...

Page 3: ...pret MODEL and SP C NO Maintenance Schedule 20 Troubleshooting Guide 23 Parts Information 24 7 SJ8 3CR 96 AA TTTT 1 2 3 4 r 1 Factory code for general identification 2 Specific Type C Indicates re connectible R REMOTE Electric starting For permanent installation can be connected to optional accessory equipment for remote or automatic control of starting and stopping 3 Factory code for optional equ...

Page 4: ...E group tH i Two in Series Amplhr SAE rating 20 hr nominal 74 Startingbystarting motor with solenoid shi ft andover run clutch Yes Battery charge rate amperes 2 5 Charge ammeter scale 5 0 5 Oil Capacity in U S quarts Refill 3 2 84 litre Ventilation Required cfm 1800 rpm Engine Pressure Cooling 520 14 7 m3 min Engine Vacu Flo Cooling 610 17 3 rna min Generator 126 3 6 m3 min Combustion 32 0 9 m3 mi...

Page 5: ... an automatic spark advance of 30 Sets with a flywheel magneto must always fire at 25 BTC regardless of fuel IWARNING ENGINE EXHAUST GAS CARBON MONOXIDE IS DEADLYI Carbon monoxide is an odorless colorless gas formed by Incomplete combustion of hydrocarbon fuels Carbon monoxide Is a dangerous gas that can cause unconsciousness and Is potentially lethal Some of the symptoms or signs of carbon monoxi...

Page 6: ...cooling air which is drawn in through the end bell cover over the rotor and discharged through an outlet at the blower end A ball bearing in the end bell supports the outer end of the rotor shaft The end bell and generator stator housing are attached byfour through studs which pass through the stator assembly to the engine generator adapter The brushless exciter stator mounts in the end bell while...

Page 7: ...SSEMBLY 5 VOLTAGE REGULATOR The line voltage regulator on the J series generator sets isan all solid state device that is no relays or tubes are needed Basic components of the voltage regulator are Printed circuit board VR21 Voltage reference transformer T21 Commutating reactor CMR21 Field circuit breaker CB21 Voltage adjust rheostat R22 Optional Figure 2 shows the above components in a typical co...

Page 8: ...rs t01110th that the unit has run Use it to keep a record for periodic servicing Time is accumulative meter canno llbe reset Frequency Me ter lndicates the frequency of the generator ou put in hertz It can be u sed to check engine speed Each hertz equals 30 rpm Warning Llg ts Three red indicatoJ lightsgive war ningof f Overspeed i Low oil pr ssure High engirtetemperature hr e re t t hptit onsper i...

Page 9: ...oused installations need proper size and positioned vents for required air flow Figure 4 See SPECIFICA nONS for the air requirements at 1800 rpm Vent sizes depend on variable conditions 1 size of enclosure 2 ambient temperature 3 electrical load 4 running time 5 restrictions imposed by screens louvers shutters or filters and 6 preVailing wind direction A required volume of air must reach the unit ...

Page 10: ...A611 14 1516 371 mm E I E I Z I I E 6 IJB 150 HERTZ S I 7 6J HERTZ 1l 1 1 1 5 8 l 295 mm fl 1 5 0JB 50 HERTZ S I 7 Z 1 6 0JB 60 HERTZ 01 u 0 L 12 I S 0 t I I 308 mm E l 6 0jB SO HERTZ z E 7 5jB 60 HERTZ 0 0 0 J N a u MOUNTING BOLT LOCATIONS LOUVER NEAR AUTOMATIC LOAD TRANSFER CEI LING INCOMING SERVICE CONTROL NOTE IF REVOLVING FIELD TYPE SET IS INSTALLED IN SMALLER THAN APPROXIMATELY 384 CU FT 11m...

Page 11: ...TRAY FOR EASY ACCESS FOR SERVICING Provide openings near top of compartment to permit heated air to escape TRAY LOCK FIGURE 5 TYPICAL MOBILE INSTALLATION STAHDSY IH STAllATIOH CONTROLS ON THIS END i FIGURE 6 TYPICAL OUTDOOR INSTALLATION 9 ...

Page 12: ...provide a manual shutoff valve In both fuel supply ilnes Fuel leaks create fire and explosion hazards ARNING Do not use galvanized lines fittings or fuel tanks In underground portions of the fuel system Hazardous fuel leaks may be caused by electrolytic corrosion from moisture and chemicals In the soli galvanism Some safety ordinances prohibit the use of galvanized materials In fuel systems and th...

Page 13: ...e phase and broad range generators are connec tible or later reconnectible to provide any of the output voltages shown in Figure 9 Code 3C or S3C Reconnectlble Generators The single phase 60 and 50 Hertz generators have output leads T1 P P and P available for making the single phase voltage and load connections shown in Figure 9 at the installation site Grounding procedu re should comply with loca...

Page 14: ...er remove W10jumper or insulate one end and leave unconnected GENERATOR CONNECTION SCHEMATIC DIAGRAM 120 LI T3 TI if4T2 L2 LI TI Ll T8 Til T7 TIQ T6 T3 L3 T2 T5 12 LO 9 LIT I L2 T T5 T7 T I jr8 2 TI LO Til TiJ T9 T I L3 LI 12 T9 TI L3 T6 1 3 T I LO Til T7 T8T _ TIO T2 L2 T T 2 I LO T9 TI2 T7 Til TIO T8 Ll LI 6 T T9 Til TI T7 Til 0 TS 1 2 L2 120 240 TI LI T2 3 LO iT L2 LOAD TO GENERATOR CONNECTION ...

Page 15: ...are secureo BatterY polarity must agree with the rectifier located in the control box If battery ground must be changed reverse the rectifier connection in the control box K STARTING MOTOR STARTER CRANKED SETS BATTERY POSITIVE 12 V BATTERY I I CABLE SIZE 2 0 00 000 0000 4 ft S ft 7 ft 9 ft II ft 14 ft FIGURE 11 BATTERY CONNECTIONS If battery polarity is reversed damage will L occur within 3 minute...

Page 16: ...on for recommend ed oil changes PRE HEATER OPTIONAL AIR CLEANER RECOMMENDED FUEL Use clean fresh regular grade automotive gasoline For new engines most satisfactory results could be obtained by using nonleaded gasoline For older engines that have previously used leaded gasoline heads must be taken offand all lead depOSits removed from engine before switching to nonleaded gasoline If lead deposits ...

Page 17: ...trol has a reset button push it to reset only after a shutdown resulting from oil pressure failure occurs Find the cause before restarting the engine To prevent fa lse starts hold on start switch until the centrifugal switch automatically disengages starter motor Do not apply oyervoltage to the starting circuit at any time OYerv9ltage will destroy the glow plugs and air heater In 2 to 3 seconds If...

Page 18: ...rly installed and undamaged LOW TEMPERATURES 1 Use correct SAE No oil for temperature con ditions Change oil only when ngineis warm If an unexpected temperature drop causes an emergency move the set to a warm location or apply heated air never use open flame external ly until oil flows freely f 2 Use fresh fuel Protect against moisture conden satior 3 Keep fuel system clean and batteries in a well...

Page 19: ... main adjustment needle A affects operation under heavy load conditions Idle adjustment affects operation at light or no load Under normal circumstances factory carburetor adjustments should not be disturbed If the adjustments have been disturbed turn needles off their seats 1 to 1 1 2 turns to permit starting then readjust them for smooth operation IGNITION BREAKER POINTS 020 FUEL IDLE ADJUSTMENT...

Page 20: ... Make idle adjustment with no load connected to the generator Use a tachometer or connect a frequency meter to generator output Slowly turn idle adjusF ment out until engine speed or generator frequency drops slightly t elownormal Then turn needle in until speed or frequency returns to normal FIGURE 18 CARBURETOR ADJUSTMENTS EARLY MODELS HAVE MAIN FUEL ADJUSTMENT ON TOP OF CARBURETOR GASOLINE MAIN...

Page 21: ...crease RPM and counterclockwise to reduce governed speed Hold a tachometeragainst flywheel cap screw SensUMtyAdJustment To adjust governor sensitivity no load to full load speed droop tu rn the sensitivity adjusting ratchet accessible through a covered access hole on the side of the blower housing Counterclockwise gives more sensitivity less speed drop when full load is applied clockwise gives les...

Page 22: ...y with filtered low pressure air Also check to see that diodes and leadwires are properly torqued The diodes should be torqued to 25 in lb 2 8 N m or finger tight plus a quarter turn See Figure 1 BATTERIES Check the condition of the starting batteriesat least every two weeks See that connections are clean and tight A light coating of non conductive grease will retard corrosion at terminals Keep th...

Page 23: ... in detergent and water use new element after 6 washings Dry and re install Oil BATH TYPE OPTIONAL 1 Loosen bottom clamp remove cleaner base and clean 2 Refill base to oil level mark with fresh oil same weight as used KEEP OI L L AT THIS in engine AIR CL EANERS LEVEL CAPANO OIL LEVEL INDICATOR KEEP OIL AT THIS LEVEL __ __ _ fULL NEVER OPERATE ENGINE WITH OIL BELOW THIS LEVEL i Ir LC1W ALWAYS REPLA...

Page 24: ...lamp andlnaulator halves to relea e breather cap and valve as embl Wash cap and valve aase mbly and the baffle In suitable solvent and reinstall CRANKCASE BREATHER OIL DRAIN i SPARK PLUG GAP 0 025 IN 0 64 mm FIGURE 22 MAINTENANCE PROCEDURES I C 22 ...

Page 25: ...TROUBLESHOOTING GUIDE GASOLINE ENGINE TRO U BLESHOOTING GUIDE 23 ...

Page 26: ... 0584 Air Cleaner Gasket 140 0636 Air Cleaner Element and Retainer 167 0241 Spark Plug 2 Non Resistor Type 167 0237 Spark Plug 2 Resistor Type 160 0002 Breaker Points 312 0116 Condenser Breaker POints 166 0346 Ignition Coil 141 0747 Carburetor Repair Kit 141 0748 Carburetor Gasket Kit 154 0733 Carburetor Base Gasket 191 0433 12 Volt Solenoid Switch 168 0083 Gasket Kit Set overhaul i 154 0463 Exhau...

Page 27: ...If you need help with your old Onan visit the Smart Guys at The Stak They have many years of experience and they are happy to help http www smokstak com forum forumdisplay php f 1 ...

Page 28: ...ONAN 1400 73RD AVENUE N E MINNEAPOLIS MINNESOTA 55432 A DIVISION OF ONAN CORPORA TION ...

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