Miller Electric 251 NT manual Dia Part Description Mkgs Quantity

Page 44

Item

Dia.

 

Part

Description

 

 

No.

Mkgs.

 

No.

Quantity

 

 

 

 

 

Figure 10-1. Main Assembly

 

 

 

 

 

 

 

 

. . .

1 . .

. . . . . . . .

.. .. .♦

182 367 . .

PANEL, right side

. . . 1

. . .

1 . .

. . . . . . . .

185 352 . .

PANEL, right side stainless

. . . 1

. . .

2 . .

. . . . . . . .

.. .. .♦

182 366 . .

PANEL, left side

. . . 1

. . .

2 . .

. . . . . . . .

185 353 . .

PANEL, left side stainless

. . . 1

. . .

3 . .

. . . . . . . .

. . +183 221 . .

COVER, top

. . . 1

. . .

3 . .

. . . . . . . .

. +♦

185 354 . .

COVER, top stainless

. . . 1

. . .

4 . .

. . . . . . . .

. . .

182 761 . .

LABEL, general precautionary engine drive

. . . 1

. . .

5 . .

. . . . . . . .

. . .

192 042 . .

LABEL, warning engine fuel

. . . 1

. . .

6 . .

. . . . . . . .

. . .

181 881 . .

GROMMET, neck filler

. . . 1

. . .

7 . .

. . . . . . . .

. . .

147 601 . .

CAP, tank screw-on

. . . 1

. . .

8 . .

. . . . . . . .

. . .

108 487 . .

LABEL, warning falling equipment etc

. . . 1

. . .

9 . .

. . . . . . . .

. . .

183 433 . .

PIPE, exhaust elbow

. . . 1

. . . 10 . .

. . . . . . . .

. . .

183 314 . .

CLAMP, muffler 1.625 dia

. . . 1

. . . 11 . .

. . . . . . . .

.. .. .♦

182 365 . .

PANEL, rear upper

. . . 1

. . . 11 . .

. . . . . . . .

185 351 . .

PANEL, rear upper stainless

. . . 1

. . . 12 . .

. . . . . . . .

. . .

183 626 . .

BAFFLE, air

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

185 323 . .

SEAL, baffle engine air

. . . 2

. . .

. . . . .

. . . . . . . .

. . .

010 493 . .

BUSHING, snap-in nylon

. . . 1

. . . 13 . .

. . . . . . . .

. . .

159 914 . .

UPRIGHT, base

. . . 1

. . . 14 . .

. . . . . . . .

. . .

164 928 . .

SEAL, barrel

. . . 1

. . . 15 . .

. . . . . . . .

. . .

183 166 . .

PANEL, rear lower

. . . 1

. . . 16 . .

. . . . . . . .

. . .

165 271 . .

VALVE, oil drain 3/8-18NPTF (included with engine)

. . . 1

. . . 17 . .

. . . . . . . .

. . .

165 623 . .

LABEL, engine maintenance

. . . 1

. . . 18 . .

. . . . . . . .

. . .

187 126 . .

ENGINE, gas (consisting of)

. . . 1

. . . 19 . .

. . . . . . . .

. . .

183 434 . . .

. MUFFLER, exhaust engine

. . . 1

. . . 20 . .

. . . . . . . .

. . .

065 313 . . .

. GASKET, muffler

. . . 1

. . . 21 . .

. . . . . . . .

. . .

059 926 . . .

. PIN, spring CS .093 x 1.000

. . . 1

. . . 22 . .

. . TS1

. . .

165 810 . . .

. SOLENOID, 14VDC .53A

. . . 1

. . . 23 . .

. . . . . . . .

. . .

165 522 . . .

. BRACKET, mtg solenoid

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

192 868 . . .

. INDICATOR/CAP ASSEMBLY (Dipstick)

. . . 1

. . .

. . . . .

. . . . . . . .

.. .. .♦

192 869 . . .

. ADAPTER ASSEMBLY (1 in. collar on oil fill tube)

. . . 1

. . .

. . . . .

. . . . . . . .

192 093 . .

PUMP, electric fuel

. . . 1

. . .

. . . . .

. . PLG5

. . . .

. . . . . . . . . .

CONNECTOR, (Part of engine harness)

. . . 1

. . .

. . . . .

. . RC5 . . . . 116 045 . .

CONNECTOR & PINS

. . . 1

. . .

. . . .

PLG7, RC7 .

. . . . . . . . . .

CONNECTOR, (Part of engine harness)

. . . 1

. . .

. . . . .

. PLG10 . .

174 823 . .

CONNECTOR & SOCKETS

. . . 1

. . .

. . . . .

. . RC10

. . .

174 824 . .

CONNECTOR & PINS

. . . 1

. . . 24 . .

. . . . . . . .

. . .

Fig 10-3 . .

GENERATOR

. . . 1

. . . 25 . .

. . . . . . . .

. . .

167 730 . .

CABLE, battery neg 29.00 lg

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

165 600 . .

CABLE, battery neg 18.50 lg

. . . 1

. . . 26 . .

. . . . . . . .

. . .

182 935 . .

HOLD DOWN, battery

. . . 1

. . . 27 . .

. . . . . . . .

. . +182 897 . .

DOOR, access bat

. . . 1

. . . 28 . .

. . . . . . . .

. . .

168 385 . .

LABEL, warning battery explosion can blind

. . . 1

. . . 29 . .

. . . . . . . .

. . .

167 731 . .

CABLE, bat pos 19.500 lg (included w/engine)

. . . 1

. . . 30 . .

. . . Batt

. . .

167 677 . .

BATTERY, stor 12V 450crk 75rsv GP58

. . . 1

. . . 31 . .

. . . . . . . .

. . +182 845 . .

BASE

. . . 1

. . . 32 . .

. . . . . . . .

. . .

181 057 . .

COVER, base

. . . 4

. . . 33 . .

. . DC-Z

. . .

187 018 . .

STABILIZER ASSEMBLY, (consisting of)

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

187 020 . . .

. STABILIZER

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

180 625 . . .

. BRACKET, mtg rectifier

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

164 920 . . .

. BRACKET, mtg stab/reactor

. . . 2

. . . 34 . .

. . SR1

. . .

183 051 . .

RECTIFIER, si 3ph 300A

. . . 1

. . . 35 . .

. . . . . . . .

. . .

182 928 . .

BRACKET, mtg generator

. . . 1

. . . 36 . .

. . . . . . . .

. . .

159 905 . .

BRACKET, mtg engine

. . . 1

. . . 37 . .

. . . . . . . .

. . .

121 652 . .

FILTER KIT, fuel w/clamps

. . . 1

. . . 38 . .

. . . . . . . .

. . .

174 001 . .

SEAL, fuel hose fitting

. . . 1

. . . 39 . .

. . . . . . . .

. . .

182 079 . .

TANK, fuel 10 gal (consisting of)

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

124 253 . . .

. BUSHING, tank fuel

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

187 502 . . .

. FITTING, stand pipe

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

182 922 . . .

. BUSHING, fuel tank 1.210 ID

. . . 1

. . .

. . . . .

. . . . . . . .

. . .

182 925 . . .

. GAUGE, fuel

. . . 1

. . . 40 . .

. . . . . . . .

. . .

181 587 . .

TRAY, pc board

. . . 1

. . . 41 . .

. . PC2

. . .

198 412 . .

CIRCUIT CARD ASSEMBLY. field current controller

. . . 1

OM-486 Page 40

Page 43 Page 45
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Page 43 Page 45
Contents Description OM-486Processes From Miller to You Table of Contents Page Symbol Usage Arc Welding HazardsElectric Shock can kill ARC Rays can burn eyes and skinEngine Hazards Battery Explosion can Blind Moving Parts can cause injuryEngine Exhaust Gases can kill Engine Heat can cause firePrincipal Safety Standards EMF InformationRadiation can cause interference ARC Welding can cause interferenceSignification des symboles Consignes DE SÉ Curité Lire Avant UtilisationUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxLE Soudage peut provoquer un in- cendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES PIÈ CES Chaudes peuvent provoquer des brû lures graves LE Bruit peut affecter l’ouïeDES Organes Mobiles peuvent provoquer des blessures ’EXPLOSION DE LA Batterie peutLA Chaleur DU Moteur peut pro- voquer un incendie LA Chute DE L’APPAREIL peut blesserPrincipales normes de sé curité Information sur les champs é lectromagné tiquesLE Soudage À L’ARC risque de provoquer des interfé rences Consignes relatives aux stimulateurs cardiaquesSpecifications Symbol DefinitionsWeld, Power, And Engine Specifications DefinitionsFuel Consumption Dimensions, Weights, and Operating AnglesDimensions Duty Cycle Auxiliary Power CurveExceeding duty cycle can damage unit and void warranty CC/DC Mode CV/DC ModeCC/AC Mode Volt-Ampere CurvesEngine Prestart Checks InstallationInstalling Welding Generator Activating The Dry Charge Battery If Applicable Do not overfill battery cellsRead and follow all instruc ChargerConnecting The Battery Installing Exhaust PipeConnecting To Weld Output Terminals Connect negative cable lastSelecting Weld Cable Sizes Remote 14 Receptacle Information100 ft 30 m Or Less 10 100% Duty CycleAdjusting MIG Weld Puddle Consistency Stop engineTo wet out weld puddle To stiffen weld puddleDC Polarity/AC Switch Do not switch under loadRemote Amperage/Voltage Switch Operating Welding GeneratorRemote Amperage/Voltage Control Weld Current 120 240 Auxiliary Power Receptacles And Circuit BreakersOperating Auxiliary Equipment Optional Auxiliary Power Receptacles Gfci Receptacle OptionMaintenance and Troubleshooting Maintenance Label Stop engine and let cool Servicing Air CleanerServicing Optional Spark Arrestor Changing Engine Oil, Oil Filter, And Fuel Filter Weld/Power Speed Adjustment Adjusting Engine SpeedIdle Speed Adjustment Troubleshooting Overload ProtectionWelding Trouble RemedyLow weld output Check control settings Check and clean air cleaner as necessary see SectionCheck and adjust engine speed see Section See engine manualAuxiliary Power Check receptacle wiring and connectionsEngine Check governor according to engine manualElectrical Diagram Circuit Diagram For Welding GeneratorST-190 578-B Grounding Generator To Truck Or Trailer Frame Auxiliary Power GuidelinesSelecting Equipment Grounding When Supplying Building Systems How Much Power Does Equipment Require?Earth ground if supplying Amperes x Volts = WattsApproximate Power Requirements For Industrial Motors Approximate Power Requirements For Farm/Home EquipmentIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsPower Required To Start Motor How Much Power Can Generator Supply?Single-Phase Induction Motor Starting Requirements KVA/HP x HP xTypical Connections To Supply Standby Power 240 120 GroundSelecting Extension Cord Use Shortest Cord Possible Current Load Watts Amperes24-Fig Parts ListMain Assembly Dia Part Description Mkgs Quantity Panel, Front w/Components Panel, Front w/Components -1 Item Generator -1 Item Page Page Page Support ServiceYour distributor also gives Owner’s Record Miller Electric Mfg. Co

251 NT specifications

The Miller Electric 251 NT is a highly regarded multi-process welding machine known for its versatility and advanced features, making it an ideal choice for professionals in various industries. With its robust construction and user-friendly interface, the 251 NT provides an efficient solution for MIG, TIG, and Stick welding applications.

One of the main features of the Miller Electric 251 NT is its impressive output range, which allows for welding on a variety of materials and thicknesses. It delivers up to 250 amps of power, enabling users to tackle both thin and thick metals with ease. Additionally, the machine is equipped with an Auto-Set feature, which automatically adjusts the welding settings according to the material thickness and type. This eliminates the guesswork, significantly enhancing productivity and reducing setup time.

Another noteworthy aspect of the Miller Electric 251 NT is its inverter technology. This advanced technology provides a compact, lightweight design without compromising performance. Inverter technology allows for greater energy efficiency, resulting in reduced operational costs over time. The 251 NT also features a Duty Cycle of 60% at 250 amps, which means it can handle demanding tasks while maintaining optimal performance.

The Miller Electric 251 NT is designed with user convenience in mind. The intuitive digital display offers clear visibility of the settings, allowing welders to make quick adjustments. Furthermore, the machine includes a built-in memory function to store frequently used parameters, enhancing workflow efficiency.

Safety is a key component of the 251 NT's design. It comes equipped with various safety features, including overload protection and a thermal overload warning system. These features ensure that the machine operates within safe limits, minimizing the risk of damage and ensuring longevity.

In terms of portability, the Miller Electric 251 NT's lightweight design and integrated handle make it easy to transport between job sites. The durable housing protects the internal components, making it suitable for rigorous use in demanding environments.

Overall, the Miller Electric 251 NT offers a combination of power, flexibility, and ease of use, making it a top choice for welders looking to enhance their capabilities across multiple welding processes. Whether in a professional shop or on a construction site, the 251 NT stands out as a reliable and efficient welding solution.
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