NL673L4 Specifications and Dimensions Dimensional Drawing Type Displacement Bore/Stroke HP @ RPM 1800 RPM @ full load2 1800 RPM @ half load2 1500 RPM @ full load2 1500 RPM @ half load2 Exhaust outlet Fuel inlet and return Approximate dry weight Installation Data & Weight NL673L4 Overall Dimensions L x W x H: 32.8 x 17.1 x 26.8 inch (834 x 435 x 650 mm) Dimensions given in inches (mm). Dimensions subject to change without notice. Contact dealer or visit www.northern-lights.com for most current installation drawings. 1. Based on 1.0 unity power factor. Deratings: 3% per 1000 ft. over 500 feet above sea level. 1.5% for every 10° over 77°F 2. Actual fuel consumption will vary depending on operating conditions. NL673L4 Features and Benefits Engine Block • Four cycle, 3 cylinder, liquid cooled, naturally aspirated, overhead valve, industrial-duty diesel. • Swirl combustion design improves fuel efficiency, reduces smoke and noise. • Glow plugs for fast cold weather starting. Cooling System • Liquid-cooled with radiator and pusher cooling fan. Steel radiator shroud and fan guard protects the radiator and operator. Self-Venting Fuel System • Bosch-type in-line injection pump. • Stop solenoid controls the fuel rack, not throttle, to eliminate speed variance and linkage problems. • Engine speed governed to 5% for close AC frequency control. • Pintle fuel injectors have replaceable tips for lower service costs. • Mechanical fuel pump with hand primer. • Large spin-on fuel lter. • Steel fuel lines. Lubrication System • Pressure lubricated. Trochoid oil pump. • Full flow, spin-on oil filter with bypass. • 3.1 qt. (3 ltr) oil capacity. • Large replaceable air filter protects engine in dusty environments. • Residential muffler built into the exhaust manifold simplifies installation. • Meets US EPA Tier IV exhaust emission requirements for cleaner air. • 12 volt system includes starter motor, battery charging alternator with solid state voltage regulator and DC circuit breaker. • Standard, unit mount S-1B control panel has engine hour meter, start-stop switch with run light and preheat switch. • Dual panel relays and quick disconnect harness plug-ins. With optional Y-harness and 10, 20 or 40 foot wire harness extensions, you can have up to six remote control panels up to 100 feet from the generator set. • Safety shutdown system for low oil pressure and high coolant temperature. Northern Lights, direct coupled, 4 pole, revolving eld, 4 lead reconnectable generator with Class H insulation and prelubricated bearing. Conservative heat rise rating: 95°C/50°C ambient. Compare this to light duty sets with heat rise ratings of 130°C or higher. • External automatic voltage regulator gives you ±5% voltage regulation. AVR powered by dedicated AC winding for improved motor starting. AVR circuit breaker. • 30 amp mainline circuit breaker protects generator from AC overloads and shorts. • High air flow from integral fan keeps generator running cool. Special Equipment • Welded steel skid frame gives rigid support and makes installation easy. • Enhanced fan guard for improved operator safety. • Flexible mounts isolate engine vibration for smooth operation. • Long life, blue enamel paint finish. • Operator’s and parts manuals. • Rigorous quality control includes a test run with load. • Export grade shipping crate protects set. www.northern-lights.com Dealer Northern Lights, Inc. • 4420 14th Ave. NW., • Seattle WA 98107 Tel: 206-789-3880 • 1-800-762-0165 • Fax: 206-782-5455 Information and dimensions subject to change without notice. Northern Lights and Lugger are registered trademarks of Northern Lights, Inc. © 2013 All rights reserved. Litho USA. S143 5/13