Northern Lights M843NW3 Operator's Manual
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Northern Lights M843NW3 Operator's Manual

Marine generators
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OM843NW3
For Model: M843NW3
OPERATOR'S MANUAL
Marine Generators | Marine Diesel Engines | Land-Based Generators

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Summary of Contents for Northern Lights M843NW3

  • Page 1 OM843NW3 For Model: M843NW3 OPERATOR’S MANUAL Marine Generators | Marine Diesel Engines | Land-Based Generators...
  • Page 2 4420 14th Avenue N.W. Seattle, WA 98107 Tel: (206) 789-3880 Fax: (206) 782-5455 Copyright ©2013 Northern Lights, Inc. All rights reserved. Northern Lights™, and the Northern Lights logo are trademarks of Northern Lights, Inc. Printed in U.S.A. PART NO.: OM843NW3 11/13...

  • 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 OM843NW3 11/13...

  • Page 4: Introduction

    This manual covers the operating instructions for: M843N marine generator set. My Northern Lights generator set MODEL number is: Fill in the model number of your unit in the blank space provided. This will give you a reference whenever service or maintenance is required:...

  • 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 Revised 3-13-12 Safety Rules (Continued) Prevent accidental discharge of starting fluids by Operating equipment requires the full attention of storing all cans in a cool, safe place, away from sparks the operator. Do not use radio or music headphones or open flame. Store with cap securely on container. while operating machinery.
  • 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 and use appropriate equipment exactly as recommended. hands. Slowly loosen cap to relieve pressure before 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: Safety Rules

    Exhaust parts and streams can reach high Follow all recommended removal and installation temperatures during operation, leading to burns or procedures in this and associated Northern Lights other serious injury. manuals. Cleaning exhaust filters can also lead to exposure to...

  • Page 10: Lock Out / Tag Out Procedures

    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 OM843NW3 11/13...

  • Page 12: Component Locations M843Nw3 Marine Generator

    Marine Generator Component Locations Figure 1 and 2: M843NW3 Belt Guard AC Circuit Breaker for AVR Injection Pump DC Circuit Breaker Oil Filter Expansion Tank Oil Fill (2 Places) Coolant Recovery Tank Oil Drain Wet Exhaust Elbow Fuel Filter Seawater Pump...
  • Page 13 11/24/10 Marine Generator Component Locations Figure 1 and 2: M843NW3 with New Baseframe Belt Guard AC Circuit Breaker for AVR Injection Pump DC Circuit Breaker Oil Filter Wet Exhaust Elbow Oil Fill (2 Places) Coolant Recovery Tank Generator Set Plate...

  • Page 14: Control Panels

    Control Panels 1. SHUTDOWN BYPASS-PREHEAT SWITCH Two functions are built into this switch: the preheating of the engine, and bypassing of the engine safety shut- down circuit. Hold switch in the ON position 10 - 20 seconds before starting the engine, and continue holding on during engine cranking.

  • Page 15: Operating Procedures

    updated page 2-25-13 Operating Procedures STARTING BREAK-IN PERIOD 1. Hold the Shutdown Bypass-Preheat switch in the ON 1. The first 100 hours on a new or reconditioned position for 10 to 20 seconds before starting a cold engine are critical to its life and performance. engine.

  • Page 16: Shutdowns And Alarms

    Generator sets have shutdown systems to stop the engine. They have no warning horns. 1. Northern Lights recommends that you keep the b. Other alarms and shutdowns are available as following spare parts on hand for field service. The optional equipment.

  • Page 17: Servicing Schedule Chart

    updated page 2-25-13 Servicing Schedule Chart The Servicing Schedule Chart below shows the service schedule required for proper maintenance of your generator set. More detailed coverage of each Service Point (SP) is listed on the page noted in the ‘page’ column. DAILY: EVERY 250 HOURS: Check oil level in engine...

  • Page 18: Servicing

    updated 12-18-12 Servicing SP1. CHECKING OIL LEVEL LUBRICATION - GENERAL 1. Check the oil level in the crankcase with the dipstick 1. Use only clean, high quality lubricants stored in . The oil level must be in the waffled area (Fig.

  • Page 19: Air Filter

    Servicing SP4. AIR CLEANER 1. Inspect air cleaner every 250 hours. In dusty conditions, check more often. 2. Marine sets: if dirty, wash element in soapy water. Rinse and dry thoroughly before re-installing. Replace if necessary. Part number for the element is: M843N –...

  • Page 20: Fuels - General

    Servicing FUELS - GENERAL SP7-9. FUEL FILTERS 1. Use only clean, high quality fuels of the following Primary specifications, as defined by ASTM designation Fuel Filter D975 for diesel fuels: a. Use grade no. 2 diesel at ambient temperatures above freezing 32°F (0°C). b.

  • Page 21: Bleeding The Fuel System

    Servicing SP10. BLEEDING THE FUEL SYSTEM CAUTION: Escaping diesel fuel under pressure can penetrate skin causing serious personal injury. Before disconnecting lines be sure to relieve all pressure. Before applying pressure, be sure all connections are tight and lines, pipes and hoses are not damaged. Fuel escaping from a very small hole can be almost invisible.
  • Page 22 Servicing For illustrative purposes only, may not be your exact model. Figure 10: Remove delivery line flare nuts. Figure 14: Remove return line. Figure 11: Remove delivery lines. Figure 15: Unscrew injector. Figure 12: Cover lines, inlets and injection pump outlets. Figure 16: Remove and replace copper sealing washer.

  • Page 23: Injector Service

    1. Injectors should be checked every 1000 hours or more often as needed. Check should be made by SP12. INJECTION PUMP a Northern Lights dealer or local injection repair 1. Since operating conditions may vary considerably, it station. Have your dealer check the fuel injection is difficult to give a definite interval for checking the nozzle spray pattern with injection nozzle tester.

  • Page 24: Cooling System Flushing

    Open block drain cock. Remove hose from Manual. If you do not have one of these manuals, bottom of heat exchanger tank. contact your local Northern Lights dealer. c. Pour clean water into expansion tank until water coming from drains is free of discoloration and ELECTRICAL SYSTEM - GENERAL sediment.

  • Page 25: Glow Plugs

    revised 11-8-13 Servicing installing the battery. 3. If welding on the unit, disconnect the regulator and battery. Isolate the leads. 4. Disconnect the battery cables when servicing the D.C. alternator. 5. Never test with a screwdriver, etc., against any terminal to see if it emits sparks. 6.

  • Page 26: Troubleshooting

    Faulty connection • Clean and tighten battery and harness plug connections. Sulfated or worn out batteries • Check specific gravity and electrolyte level of each battery. If you cannot correct problems with these procedures, see your Northern Lights dealer. OM843NW3 11/13...

  • Page 27: Engine

    Troubleshooting ENGINE PROBLEM POSSIBLE CAUSE RECOMMENDATION(S) Engine Hard to Start Improper starting procedure • See starting section of this manual. Take or Will Not Start special note of Bypass Switch operation. No fuel • Check level of fuel in fuel tank. Low battery output •...

  • Page 28: Engine Knocks

    Injection pump out of time • See your dealer. Engine not at proper temperature • Check your thermostats. • Check water temperature with thermometer and replace gauge if necessary. If you cannot correct problems with these procedures, see your Northern Lights dealer. OM843NW3 11/13...

  • Page 29: Engine

    White Smoke Cold engine • Warm up engine to normal operating temperature. Defective thermostat • Remove and check thermostat. Engine timing off • See your dealer. If you cannot correct problems with these procedures, see your Northern Lights dealer. OM843NW3 11/13...

  • Page 30: Wiring Diagrams

    Revised 3-13-12 Wiring Diagrams OM843NW3 11/13...
  • Page 31 Revised 3-13-12 Wiring Diagrams OM843NW3 11/13...

  • Page 32: Dc Electrical

    Revised 3-13-12 Wiring Diagrams OM843NW3 11/13...
  • Page 33 Revised 3-13-12 Wiring Diagrams OM843NW3 11/13...
  • Page 34 Added 3-13-12 Wiring Diagrams OM843NW3 11/13...
  • Page 35 Added 3-13-12 Wiring Diagrams OM843NW3 11/13...
  • Page 36 Wiring Diagrams OM843NW3 11/13...
  • Page 37 Revised 9-12-13 Wiring Diagrams OM843NW3 11/13...
  • Page 38 Added 3-13-12 Wiring Diagrams OM843NW3 11/13...
  • Page 39 Added 3-13-12 Wiring Diagrams OM843NW3 11/13...
  • Page 40 Notes OM843NW3 11/13...
  • Page 41 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.

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