Onan 2.5UF-3S/1A Instruction Manual And Parts Catalog Download Page 1

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Summary of Contents for 2.5UF-3S/1A

Page 1: ...ING CURRENT PHASE 4 WIRE a n d I At ALTERNATING CURRENT 3 PHASE 4 WIRE J F REVOLVING ARMATURE INHERENTLY REGULATED ONAN 1400 73RD AVENUE N E MINNEAPOLIS MINNESOTA 55432 A DIVISION OF STUDBBAKER CORPOR...

Page 2: ...to its factory or one of its Authorized Service Stations trans portation charges prepaid within one year after being put into service by the original user and which upon examination shall disclose to...

Page 3: ...ce General Servicing Brush and Spring Removal 11 Brush Contact n Brush Rig Neutral Position 12 Major Generator Repair 13 Disassembly 13 Armature Grounded 13 Testing the Armature for an Open Circuit 13...

Page 4: ...in this column for your model when selecting parts from the list herein Order only those parts with no Parts Key No reference or those parts which refer to the Parts Key No for your model S W I T C H...

Page 5: ...agraph on REVERSING THE SCROLL The generator is shipped from the factory with the scroll assembled for counterclockwise rotation The direction of rotation of the generator is determined while looking...

Page 6: ...reset manually The cause of the overload should be determined before resetting the breaker The load current value at which the circuit breaker trips is affected somewhat by the ambient temperature Do...

Page 7: ...curely to a heavy mounting base to maintain pulley and shaft alignment B Desired direction of shaft rotation The direction of rotation will be determined by the direction of rotation of the driving un...

Page 8: ...wn WIRING CONNECTIONS The generator external leads are not con nected and their manner of connection will depend upon whether a rheostat is to be used and the DIRECTION OF ROTATION Refer to the wiring...

Page 9: ...an 1800 rpm generator is slowed to 1500 rpm the frequency of the current produced will be 50 cycles instead of 60 cycles The com bination of low voltage and frequency will almost certainly result in...

Page 10: ...rpm column The generator pulley size at the point of intersection is 7 inch This example is outlined in heavy lines in the table DRIVING P U L L E Y SPEED IN REVOLUTIONS PER MINUTE DRIVING P U L L E...

Page 11: ...in the table DRIVING PULLEY SPEED IN REVOLUTIONS PER MINUTE DRIVING P U L L E Y SIZE 600 700 800 GENEP 1 900 ATC 1000 1100 R P U L L E Y i 1200 SIZE 1300 EQU 1400 1500 RED 15OOR i 1600 PM G 1700 ENER...

Page 12: ...BLOWER SCROLL To reverse the scroll remove only the scroll with screen attached turn it end for end and reinstall it so that the scroll will be at the opposite end of the air outlet hole as illustrat...

Page 13: ...also be necessary when large changes in the electrical load are made Keep the electrical load on the generator within its nameplate rating Overloading the generator will cause the voltage to be low w...

Page 14: ...RUSHES AND SPRINGS Constant Pressure Type BRUSH CONTACT Maintain good electrical full brush contact at all times Each 200 hours of operation or once a month clean the commutator and slip rings with a...

Page 15: ...its guide Pull the end bell off carefully An undercutting tool may be fashioned from a hack saw blade grinding the blade teeth to a thickness equal to the mica between the bars of the commutator Use c...

Page 16: ...ode The sin gle bearing generators w i l l have the letters C or N after the_voltage code EXAMPLE 2 SUD IS ID W A S 2 5UD IN 1C GENERATOR MODEL EFFECTIVE SPEC INSTRUCTION MANUAL 1 5UF 232S B 943 3 2 0...

Page 17: ...ssembly Most other assembly procedures are self evident ARMATURE GROUNDED See that all brushes are lifted out of their holders Use a continuity type test lamp set Place one test prod on the commutator...

Page 18: ...nt Hold a steel blade or old hack saw blade 1 4 inch from the armature laminations If the steel blade is attracted to any magnetized armature laminations either the armature windings or commutator is...

Page 19: ...s High mica Commutator out of round Commutator surface dirty or oily Turn brush ring until the identify ing marks are aligned Sand the brush to the proper contour If the AC or DC amperage is more than...

Page 20: ...NT Brushes not contacting com Free brushes in holders Assemble mutator brushes and springs correctly Open short or grounded cir Test windings and repair or replace cuit in generator defective parts Ge...

Page 21: ...PUT OF GENERATOR Cont Open circuit of shunt field Make proper connections according winding to wiring diagram Short circuit of windings in Replace defective part the field or armature Manual field rhe...

Page 22: ...paid to your dealer or nearest AUTHORIZED SERVICE STATION Print your name and address plainly on the package Write a letter to the same address stating the reason for returning the part 4 State defini...

Page 23: ...19 FIG 7 GENERATOR PARTS...

Page 24: ...Drive End 6 234A77 1 Scroll and Screen Blower 7 Stud Generator Through 520Ai45 2 For models with Parts Key No 1 520A340 2 For models with Parts Key No 2 520A161 2 For models with Parts Key Nos 3 and...

Page 25: ...ifting 3 8 16 Replaces 410P228 Rig Assembly Brush Includes Brushes and Springs replaces 212C234 or 2l2C303 20 211D98 1 Bell End Brush Rig End 21 234C47 1 Cover End Bell 22 234C66 1 Band End Bell 23 33...

Page 26: ...E PHASE GENERATOR A C LOAD CONNECTIONS M I M 3 MZ M4 r v HAS E 2 WIRE 120 O LT S TO LOAD l WA S E 3tVlRE I 2 0 2 4 0 K O L T S M l M3 M2 M4 l P U A S E Z W HE 24 0 VOLTS TTO LOAD Ml M3 MZ J TO L O A D...

Page 27: ...aTAx iQ _Ki FI AZ iM SERT_5HFO STAT HZ RTr WHTEWU S ED J A C L O A D C O N N E C T I O N S 3 P H A 5 E 4 W I R E ST P E ARM SEN M O M M 2 M 3 20SV JL 120V 2P8V Fj0 R yi O D ELS 7 U F q Kl S P EC I A 5...

Page 28: ...h N u 5 J Cf Hl a48 TEiittiijii Cai l Mte ors I orl rs Jfo jlaK FS jf WH S ff IK BloocnircjtaH Generators Electric O N A N ELECTRIC PLANTS Gas Gasoline Diesel Engine Driven Electric Generating Plants...

Page 29: ...TALOG FOR Onan GENERATORS UF SERIES ALTERNATING CURRENT PHASE 4 WIRE and ALTERNATING CURRENT 3 PHASE 4 WIRE REVOLVING ARMATURE INHERENTLY REGULATED O N A N1400 73RD AVENUE N E MINNEAPOLIS MINNESOTA 55...

Page 30: ...l constitute fulfillment of all obligations to original user This warranty shall not apply to any of the Manufacturer s products which must be replaced because of normal wear which have been subject t...

Page 31: ...Armature Grounded 13 Testing the Armature for an O en Circuit 13 Testing the Armature for Short Circuits 14 Field Windings Open Circuit 14 Service Diagnosis Poor Commutation or Arcing at the Generator...

Page 32: ...ey No in this column for your model when selecting parts from the list herein Order only those parts with no Parts Key No reference or those parts which refer to the Parts Key No for your model New mo...

Page 33: ...par agraph on REVERSING THE SCROLL The generator is shipped from the factory with the scroll assembled for counterclockwise rotation The direction of rotation of the generator is determined while look...

Page 34: ...set manually The cause of the overload should be determined before resetting the breaker The load current value at which the circuit breaker trips is affected somewhat by the ambient temperature Do no...

Page 35: ...curely to a heavy mounting base to maintain pulley and shaft alignment B Desired direction of shaft rotation The direction of rotation will be determined by the direction of rotation of the driving un...

Page 36: ...own WIRING CONNECTIONS The generator external leads are not con nected and their manner of connection will depend upon whether a rheostat is to be used and the DIRECTION OF ROTATION Refer to the wirin...

Page 37: ...an 1800 rpm generator is slowed to 1500 rpm the frequency of the current produced will be 50 cycles instead of 60 cycles The com bination of low voltage and frequency will almost certainly result in...

Page 38: ...0 rpm column The generator pulley size at the point of intersection is 7 inch This example is outlined in heavy lines in the table DRIVING P U L L E Y SPEED IN REVOLUTIONS PER MINUTE DRIVING P U L L E...

Page 39: ...e table DRIVING PULLEY SPEED IN REVOLUTIONS PER MINUTE DRIVING PULLEY SIZE 600 7O0f 800 GENEF 4 900 ATC 1000 R PU 1100 LLEY i 1200 SIZE 1300 EQU 1400 RED 1500 1 3 OOR 1600 PM G 1700 ENER 1800 1900 ATO...

Page 40: ...o reverse the scroll remove only the scroll with screen attached turn it end for end and reinstall it so that the scroll will be at the opposite end of the air outlet hole as illustrated POLARIZING TH...

Page 41: ...also be necessary when large changes in the electrical load are made Keep the electrical load on the generator within its nameplate rating Overloading the generator will cause the voltage to be low w...

Page 42: ...PRINGS Constant Pressure Type BRUSH CONTACT Maintain good electrical full brush contact at all times Each 200 hours of operation or once a month clean the commutator and slip rings with a dry lint fre...

Page 43: ...guide Pull the end bell off carefully An undercutting tool may be fashioned from a hack saw blade grinding the blade teeth to a thickness equal to the mica between the bars of the commutator Use care...

Page 44: ...embly Most other assembly procedures are self evident ARMATURE GROUNDED See that all brushes are lifted out of their holders Use a continuity type test lamp set Place one test prod on the commutator a...

Page 45: ...Hold a steel blade or old hack saw blade 1 4 inch from the armature laminations If the steel blade is attracted to any magnetized armature laminations either the armature windings or commutator is sho...

Page 46: ...rs High mica Commutator out of round Commutator surface dirty or oily Turn brush ring until the identify ing marks are aligned Sand the brush to the proper contour If the AC or DC amperage is more tha...

Page 47: ...NT Brushes not contacting com Free brushes in holders Assemble mutator brushes and springs correctly Open short or grounded cir Test windings and repair or replace cuit in generator defective parts Ge...

Page 48: ...PUT OF GENERATOR Cont Open circuit of shunt field winding Short circuit of windings in the field or armature Manual field rheostat if used adjusted at minimum voltage Make proper connections according...

Page 49: ...paid to your dealer or nearest AUTHORIZED SERVICE STATION Print your name and address plainly on the package Write a letter to the same address stating the reason for returning the part 4 State defini...

Page 50: ...19 FIG 7 GENERATOR PARTS...

Page 51: ...Drive End 6 234A77 1 Scroll and Screen Blower 7 Stud Generator Through 520A145 2 For models with Parts Key No 1 520A340 2 For models with Parts Key No 2 520A161 2 For models with Parts Key Nos 3 and...

Page 52: ...Parts Key Nos 3 and 4 Frame Generator For models with Parts Key No 1 For models with Parts Key No 2 For models with Parts Key Nos 3 and 4 Bolt Eye Lifting 3 8 16 Replaces 410P228 Bell End Brush Rig E...

Page 53: ...CK WISE ROTATION Fl M I M 3 M 2 P H A S E 2 WIRE 120 OLTS 3 TO L O A D M 4 A2 Fl A2 F2 I NSJEBT R ft EO STA T feL LSi W RE NOISED 1 Ml M3 MZ W4 LPW A SE 31V RE 120 24 0KOLT S M l M3 M2 M4 I PHA STE l...

Page 54: ...J SE ROTATION FZ FORCOUMTER CLO CKWJ iS F l F _ A 2 a IKS E R T IRH F O STAT HERTilMZHE Ki USED A C LOAD CONNECTIONS 3 P H A S E 4 WIRE STD RE ARM GEN 120V 7UF FKI SPEC IA F2 A A P v j S M F D C O N D...

Page 55: ...l Engine Driven Electric Generating Plants I 500 to 400000 Watts AC Also D C Battery Charsers Marine Plants Magnet Chargers Separate Generators Parts Q n a n W J INFORMATION CALL llWogfcal fitdlbig Co...

Page 56: ...PHASE 4 WIRE and ALTERNATING CURRENT 3 PHASE 4 WIRE REVOLVING ARMATURE INHERENTLY REGULATED V I tf S I B U N I V E R S I T Y A V E 8 E M I N N E A P O L I S MINN 8 8 4 1 4 l H y A N A D A S 0 N A H O...

Page 57: ...s fac tor v or one of its Authorized Service Stations trans portation charges prepaid within one year after being put into service bv the original user and whic h upon examination shall disclose to th...

Page 58: ...ce General Servicing Brush and Spring Removal 11 Brush Contact 11 Brush Rig Neutral Position 12 Major Generator Repair 13 Disassembly 13 Armature Grounded 13 Testing the Armature for an Open Circuit 1...

Page 59: ...his column for your model when selecting parts from the list herein Order only those parts with no Parts Key No reference or those parts which refer to the Parts Key No for your model S W I T C H B O...

Page 60: ...ph on REVERSING THE SCROLL The generator is shipped from the factory with the scroll assembled for counterclockwise rotation The direction of rotation of the generator is determined while looking at t...

Page 61: ...reset manually The cause of the overload should be determined before resetting the breaker The load current value at which the circuit breaker trips is affected somewhat by the ambient temperature Do...

Page 62: ...curely to a heavy mounting base to maintain pulley and shaft alignment B Desired direction of shaft rotation The direction of rotation will be determined by the direction of rotation of the driving un...

Page 63: ...wn WIRING CONNECTIONS The generator external leads are not con nected and their manner of connection will depend upon whether a rheostat is to be used and the DIRECTION OF ROTATION Refer to the wiring...

Page 64: ...an 1800 rpm generator is slowed to 1500 rpm the frequency of the current produced will be 50 cycles instead of 60 cycles The com bination of low voltage and frequency will almost certainly result in...

Page 65: ...100 rpm column The generator pulley size at the point of intersection is 7 inch This example is outlined in heavy lines in the table DRIVING PULLEY SIZE DRIVING PULLEY SPEED IN REVOLUTIONS PER MINUTE...

Page 66: ...table DRIVING PULLEY SPEED IN REVOLUTIONS PER MINUTE DRIVING PULLEY SIZE 600 700 800 GENEP I 900 ATC 1000 1100 R PULLEY i 1200 SIZE 1300 EQU 1400 1500 RED 1500 R 1600 PM G 1700 ENER 1800 ATOR 1900 200...

Page 67: ...BLOWER SCROLL To reverse the scroll remove only the scroll with screen attached turn it end for end and reinstall it so that the scroll will be at the opposite end of the air outlet hole as illustrat...

Page 68: ...also be necessary when large changes in the electrical load are made Keep the electrical load on the generator within its nameplate rating Overloading the generator will cause the voltage to be low w...

Page 69: ...Pressure Type BRUSH CONTACT Maintain good electrical full brush contact at all times Each 200 hours of operation or once a month clean the commutator and slip rings with a dry lint free cloth Do not a...

Page 70: ...h spring and brush from its guide Pull the end bell off carefully An undercutting tool may be fashioned from a hack saw blade grinding the blade teeth to a thickness equal to the mica between the bars...

Page 71: ...eassembly Most other assembly procedures are self evident ARMATURE GROUNDED See that all brushes are lifted out of their holders Use a continuity type test lamp set Place one test prod on the commutat...

Page 72: ...rent Hold a steel blade or old hack saw blade 1 4 inch from the armature laminations If the steel blade is attracted to any magnetized armature laminations either the armature windings or commutator i...

Page 73: ...rs High mica Commutator out of round Commutator surface dirty or oily Turn brush ring until the identify ing marks are aligned Sand the brush to the proper contour If the AC or DC amperage is more tha...

Page 74: ...RRENT Brushes not contacting com Free brushes in holders Assemble mutator brushes and springs correctly Open short or grounded cir Test windings and repair or replace cuit iri generator defective part...

Page 75: ...PUT OF GENERATOR Cont Open circuit of shunt field winding Short circuit of windings in the field or armature Make proper connections accordmg to wiring diagram Replace defective part Manual field rheo...

Page 76: ...repaid to your dealer or nearest AUTHORIZED SERVICE STATION Print your name and address plainly on the package Write a letter to the same address stating the reason for returning the part 4 State defi...

Page 77: ...19 I 26 FIG 7 GENERATOR PARTS...

Page 78: ...d Drive End 6 234A77 1 Scroll and Screen Blower 7 Stud Generator Through 520A145 2 For models with Parts Key No 1 520A340 2 For models with Parts Key No 2 520A161 2 For models with Parts Key Nos 3 and...

Page 79: ...th Parts Key No 2 For models with Parts Key Nos 3 and 4 Bolt Eye Lifting 3 8 16 Replaces 410P228 Rig Assembly Brush Includes Brushes and Springs Replaces 212C234 fcr i L f r D Bell End Brush Rig End C...

Page 80: ...O C K W I S E ROTATION Fl A A 2 A2 1N St R X R H E 0 5T4 T feLLR W RE t m S E D M J M3 M2 M4 Ml M 3 MZ r p H A S E 2 W I R E l a o y o L T S TO L O A D 1 I PWSE 3IV RE IZO Z4 OVOLTS M l M3 M2 K 14 2...

Page 81: ...IRE ISTD REV ARM GEM FOR CLOCKWJSE ROTATION F2 FOR COUMTER C LO WJ STJlOTATJ O hl Fl Fl T AZ F2 I NSE RTJ HERT jT WHTE KISSED 120V Fa R M Q crEi s 7UF Kl SPEC TA A P MATURE SMFD COND W2 3 12 Al7 I MFD...

Page 82: ...GAJA and SesnUoe Ge Ue Vn tn U tnaioA cities Uiey ale UUe d in Uie claiA ffied l otlan tUe telefUi ne djA ctosuf See QestesiatoAA ClecJsUc W r i t e the factory for a complete current listing of O n a...

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