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Northern Lights ONL673 Operator's Manual

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ONL673
For Models: NL673K, NL673L, NL673L2, and NL673L3
OPERATOR'S MANUAL
Marine Generators | Marine Diesel Engines | Land-Based Generators

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Summary of Contents for Northern Lights ONL673

  • Page 1 ONL673 For Models: NL673K, NL673L, NL673L2, and NL673L3 OPERATOR’S MANUAL Marine Generators | Marine Diesel Engines | Land-Based Generators...
  • Page 2 This label is to state: ULTRA LOW SULFUR FUEL ONLY Northern Lights is providing this label for application to the fuel inlet of the fuel supply tank for each engine or generator set. This is to be applied by the installer of the engine or gen set, or by the manufacturer of the equipment that the engine or gen set is installed in.

  • Page 3: Table Of Contents

    This publication is the property of Northern Lights, Inc. It may not be reproduced in whole or in part without the written permission of Northern Lights, Inc. © Northern Lights, Inc. All rights reserved. Litho U.S.A. Publication number ONL673 11/13...

  • Page 4: Introduction

    67 mm 2 = Tier II compliant 3 = Tier III compliant Northern Lights industrial generator set with a 673 Northern Lights industrial generator set with a NL673K NL673L engine, TF-276D series generator end, and AVR.

  • Page 5: Warranty

    For replacement signs, ALWAYS STOP ENGINE proper placement of safety signs or clarification on any BEFORE FUELING safety issue, consult your Northern Lights dealer or the MACHINE. Always fill factory. portable fuel tank outdoors. There can be additional safety information contained Never fuel a hot engine.
  • Page 6 Wear suitable authorized moving parts have stopped hearing protection, such before making any adjustments, as earmuffs or plugs to connections, or performing protect against loud noises. any other type of service to the engine or other driven equipment. ONL673 11/13...
  • Page 7 Among the potentially hazardous with a metal object. Use a volt-meter or hydrometer. chemicals that may be used with Northern Lights Frozen batteries may explode if charged. Never products are lubricants, charge a battery that has not been allowed to warm to at least 16 o C (60 o F).
  • Page 8 Follow the procedures hands. Slowly loosen cap to relieve pressure before and use appropriate equipment exactly as recommended. opening fully. Contact your Northern Lights dealer or Northern Lights factory for MSDS’s used on Northern Lights products. Avoid High Pressure Fluids WARNING...
  • Page 9 The asbestos used in these components is usually environment and lead to unsafe working conditions. found in a resin or otherwise sealed. Normal Potentially harmful waste used in Northern Lights handling of these components is not dangerous, equipment can include oil, fuel, coolant, filters and as long as airborne dust containing asbestos is not batteries.
  • Page 10 Scope During maintenance, repairs or retooling of a Northern Lights generator set, simply turning the machine off or unplugging it while it is being worked on does not give enough protection to others who are not performing the maintenance or repair.
  • Page 11 Notes ONL673 11/13...

  • Page 12: Industrial Generator

    12. Secondary Fuel Filter 3. Air Filter 8. Radiator Shroud 13. Vibration Mount 4. Crankcase Vent 9. Dipstick 14. Exhaust Outlet 5. Lube Oil Fill 10. Oil Filter 15. Starter 6. Injection Pump 11. Fuel Lift Pump 16. Alternator ONL673 11/13...

  • Page 13: Control Panel

    RUN position. To stop the engine, hold the switch in the STOP position. NOTE: The rocker switch is used on Series 1 panels only, and has a light that glows when the set is running. 3. HOUR METER Keeps track of engine running time. ONL673 11/13...

  • Page 14: Operating Procedures

    ON while the engine is running. If the switch is turned OFF while the engine is running, the battery charging regulator could be ruined. STARTING 1. Hold the Shutdown Bypass-Preheat switch in the ON position for 10 to 20 seconds before starting a cold ONL673 11/13...

  • Page 15: Shutdowns And Alarms

    The parts are oil pressure. available from your local Northern Lights dealer. Other alarms and shutdowns are available as optional equipment. 2. All owners should have the following: NOTE: Do not rely on any shutdowns to the a. Primary and secondary fuel filter elements...

  • Page 16: Servicing Schedule Chart

    1) Perform all maintenance once a year even if hour level has not been reached. 4) After first 50 hours and at 100 hours. 2) Whenever necessary. 5) Clean injection nozzles every 1500 hours. 3) More often if necessary. 6) Replace element every 1000 hours. ONL673 11/13...
  • Page 17 Service Record Notes ONL673 11/13...

  • Page 18: Servicing

    6. Fill engine with recommended oil. Start engine and check for leakage. Stop engine, wait 3 minutes, and check oil level. Add additional oil if necessary. 7. The oil filter part numbers are: #24-08001 - NL673L2 and NL673L3 #24-02001 - NL673K and NL673L ONL673 11/13...

  • Page 19: V-Belts

    5. Repeat steps 3 and 4 for each cylinder. Each set of low idle. valves must be adjusted individually. 6. Replace the rocker arm cover. Tighten cover nuts to 5 - 8 ft/lbs (0.8 - 2.3 kg/m). Figure 5: Belt Tension ONL673 11/13...

  • Page 20: Fuels - General

    Keep dirt, scale, water, and other foreign matter NL673K, L, L2, L3 – #24-52020 out of fuel. b. Avoid storing fuel for long periods of time. c. Fill the fuel tank at the end of each day’s operation. This will reduce condensation. ONL673 11/13...

  • Page 21: Bleeding The Fuel System

    Pump hand primer “B” on fuel lift pump until pure fuel (no bubbles) escapes from bleed screw “A”. Tighten bleed screw “A”. 3. Loosen bleed screw “C”. Pump hand primer “B” on fuel lift pump until pure fuel (no bubbles) escapes from bleed screw “A”. ONL673 11/13...
  • Page 22 Figure 8: Remove delivery line flare nuts. Figure 12: Unscrew injector. Figure 9: Remove delivery lines. Figure 13: Remove and replace copper sealing washer. Figure 10: Remove return line nuts. Figure 14: Reinstall injector. Torque to proper tightness. Figure 11: Remove return line. ONL673 11/13...

  • Page 23: Injector Service

    1. Injectors should be checked every 1000 hours. is difficult to give a definite interval for checking the Check should be made by a Northern Lights dealer injection pump. But as a rule, pump settings, or local injection repair station.

  • Page 24: Cooling System Flushing

    6. Do not polarize the alternator or regulator. 7. A D.C. circuit breaker protects your control panel and wiring harness. It is located in the side of the generator junction box. ONL673 11/13...

  • Page 25: Glow Plugs

    (+) terminal of main battery. Then, connect negative (-) terminal of booster battery to ground on the engine block ( see Figure 16 4. Remove booster battery after starting engine. 5. Sealed batteries: See manufacturer charging and booster instructions. Figure 16: Battery connections. ONL673 11/13...
  • Page 26 11. Shaft 12. Ventilation Cover CONTROL BOX (Figure 19) Control Terminal Board Automatic Voltage Regulator (AVR) 12 Volt DC Circuit Breaker AC Circuit Breaker AVR Circuit Breaker Output Terminal Board Figure 18: Generator Components. Figure 19: Control Box Components. ONL673 11/13...
  • Page 27 240 Figure 22 Figure 22: Control Terminal Board, 240 Volt Output b. Connect U2 to V1 on the output terminal board Figure 25: Output Terminal Board, 120/240 Volt Output Figure 23 ONL673 11/13...

  • Page 28: Generator End

    Dust and foreign material may reduce the flow of d. Generator bearing should be replaced by your cooling air, reducing heat dissipation and causing Northern Lights dealer at 10,000 hours. the generator to overheat. 6. Check the brushes b. If electrically conductive debris accumulates on a.
  • Page 29 To protect the generator and AVR from unbalanced loads and over loads, two 20 amp breakers are placed in the output circuit and one 3 amp breaker is placed in the AVR sensing circuit ( Figure 29 Figure 29: Breaker Locations. ONL673 11/13...

  • Page 30: Troubleshooting

    • Clean and tighten battery and harness plug connections. Sulfated or worn out batteries • Check specific gravity and electrolyte level of each battery. Dead Battery • Charge battery. If you cannot correct problems with these procedures, see your Northern Lights dealer. ONL673 11/13...

  • Page 31: Engine

    • See “Engine Overheats” in next category. Below normal engine temperature • Remove and check thermostat. Improper valve clearance • Reset valves. Best done by dealer. Dirty or faulty injection nozzles • Replace injectors. Best done by dealer. • See your local dealer. ONL673 11/13...
  • Page 32 Below Normal Thermostats not working properly • Check thermostats. Engine Temperature Temperature gauge • Check water temperature with thermometer. not working properly If you cannot correct problems with these procedures, see your Northern Lights dealer. ONL673 11/13...
  • Page 33 Cold engine • Warm up engine to normal operating temperature. Defective thermostat • Remove and check thermostat. Engine injection timing off • See your dealer. If you cannot correct problems with these procedures, see your Northern Lights dealer. ONL673 11/13...

  • Page 34: Wiring Diagrams

    8-16-11 Wiring Diagrams ONL673 11/13...
  • Page 35 8-16-11 Wiring Diagrams ONL673 11/13...
  • Page 36 4-30-18 Wiring Diagrams ONL673 11/13...
  • Page 37 4-30-18 Wiring Diagrams ONL673 11/13...
  • Page 38 4-30-18 Wiring Diagrams ONL673 11/13...
  • Page 39 8-16-11 Wiring Diagrams ONL673 11/13...
  • Page 40 8-16-11 Wiring Diagrams ONL673 11/13...
  • Page 41 Wiring Diagrams ONL673 11/13...
  • Page 42 8-16-11 Wiring Diagrams ONL673 11/13...
  • Page 43 4-9-12 Wiring Diagrams ONL673 11/13...
  • Page 45 4420 14th Ave. NW., Seattle WA 98107 Tel: (206) 789-3880 • 1-800-762-0165 • www.northern-lights.com Northern Lights and Lugger are registered trademarks of Northern Lights, Inc. © 2013 All rights reserved. Litho USA.

This manual is also suitable for:

Nl673kNl673lNl673l2Nl673l3

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