Northern Lights NL843NW3 User manual

P843-3
For Models: M843NW3 and NL843NW3
PARTS CATALOG
Marine Generators | Marine Diesel Engines | Land-Based Generators

Diesel engine exhaust and some of its constitu-
ents are known to the State of California to cause
cancer, birth defects, and other reproductive harm.
— CALIFORNIA —
Proposition 65 Warning:
Northern Lights
4420 14th Avenue N.W.
Seattle, WA 98107
Tel: [phone]
Fax: [phone]
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.: P843-3 05/13

P843-3 5/13
GROUP 5 - ELECTRICAL SYSTEM
12 & 24 Volt Engine ................................. 0 - 4
Alternator, Starter, and Flywheel Housing........ 5
Alternator ..................................................... 6
Starter Assembly ........................................... 7
Alternator Assembly ...................................... 8
Control Panels........................................ 9 - 12
Belt Guard Assembly ................................... 13
GROUP 6 - GASKET SETS
Gasket Kit ...........................................................0
GROUP 7 - GEAR AND ADAPTER SETS
Not available at this time.
GROUP 8 - FRAME & MOUNTING
Base Frame Assembly............................... 1 - 2
GROUP 9 - ACCESSORIES
GROUP 9 - & OPTIONAL EQUIPMENT
PTO Adapter ................................................ 1
Electric Clutch ............................................ 2
Oil Drain Kit................................................. 3
Keel Cooling Conversion ............................... 4
Coolant Recovery Tank .................................. 5
Remote Expansion Tank................................. 6
Low Coolant Level Switch/Gauge................... 7
GROUP 1 - ENGINE
Cylinder Block Assembly ......................... 0 - 1
Crankshaft and Flywheel Assembly ........... 2 - 3
Camshaft and Oil Pump ............................ 4 - 5
Cylinder Head .......................................... 6 - 7
Rocker Arm Assembly ............................ 8 - 10
GROUP 2 - INTAKE & EXHAUST SYSTEM
Air Filter and Housing ................................... 1
Air Filter and Mounting ................................. 2
Exhaust Manifold and Mufer ........................ 3
GROUP 3 - COOLING SYSTEM
Exhaust Manifold and Heat Exchanger ....... 0 - 1
Coolant Pump ............................................... 2
Coolant Pump, Fan, & Thermostat Housing ..... 3
Raw Water Pump and Mounting................. 4 - 5
Radiator and Guard................................... 6 - 7
GROUP 4 - FUEL SYSTEM
Injection Pump and Lines ......................... 0 - 1
Governor and Timing Gear Case ................ 2 - 3
Fuel Filter and Piping................................ 4 - 5
Fuel Line Connection..................................... 6
Fuel Injector.................................................. 7
Fuel Feed Pump ............................................ 8
PARTS CATALOG
for Models
M843nw3 and NL843nw3
Please read thoroughly before aempting to use this manual:
Table of Contents ............................................................................................................................................ I
Model Designation & Serial Numbers.............................................................................................................. II
Reading a Parts Page ..................................................................................................................................... III
I
Proprietary Information
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 P843-3 5/13
Table of Contents

P843-3 5/13
Model Designation
II
M - NL 843 N, W, 3
M- Northern Lights marine generator set
NL - Northern Lights industrial generator set
Model number of engine block
Bore Cylinders
84 mm 3
N - series designation
W - winding in gen. end
3- Tier III compliant
NORTHERN LIGHTS
Your set has three serial numbers: 1an engine number stamped on the block, 2a generator plate,
and 3a generator set plate. Use the serial number on the generator set plate when ordering parts or in
correspondence. The generator set plate is found on the service side of the generator and resembles the
drawing below.
MODELS INCLUDED
This manual covers the operating instructions for:
M843nw3and NL843nw3, which both use the 843 engine.
Model Numbers
Model numbers give the unit's application, block model, aspiration, and RPM:
Serial Numbers
Generator Set Serial Number
Northern Lights marine diesel generator set
with an 843 engine and a PX-312K2
generator, Tier II compliant.
M843nw3Northern Lights industrial diesel generator
set with an 843 engine and a PX-312K2
generator, Tier III compliant.
NL843nw3
INTRODUCTION
= =

P843-3 5/13
REFERENCES:
1. Grouping section title. 7. Quantity of parts used.
2. Model designation of equipment that uses parts 8. Description of each component part.
listed on this page. 9. Serial number of unit the part ts.
3. Title and description of assembly. 10. Assembly or kit designated by Key 0 or ••/•.
4. Drawing numbers that correspond to key 11. Grouping index number.
column numbers for parts identication. 12. Page number within the grouping index.
5. Key column for locating parts shown on drawing. 13. Manual title.
6. Part number. 14. Page publication date.
NOTE: aArrows always point toward the front of the engine.
III
ELECTRICAL SYSTEM
1
READING A PARTS PAGE
IMPORTANT:
Before selecting parts, be sure that you are choosing parts from the correct page.
Check the model designation at the page top.
Do not use this illustration for parts purchasing.
423
5
789
P843-2 11/05
5-2
0 185046210 1 Alternator Assembly -
1 185446219 1 Flywheel, complete -
2 185446217 1 Plate, complete -
3 185716200 1 Plate -
4 185446218 1 Stator, complete -
5 040126210 2 Bearing -
6 020210010 1 Nut -
7 027100010 1 Spring washer -
8 026100010 1 Washer -
9 185446220 1 Clamp -
10 015140408 1 Screw -
11 015140425 2 Screw -
12 199236510 1 Collar -
6
ALTERNATOR ASSEMBLY: M - NL843
14
12
11
13
10
KEY PART NUMBER QTY. DESCRIPTION SERIALNUMBER
INTRODUCTION

P843-3 5/13
1 - 0
GROUP 1 – ENGINE
Cylinder Block Assembly
843NW3cylblock

P843-3 5/13
1 - 1
GROUP 1 – ENGINE
Cylinder Block Assembly
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 110101290 1 Cylinder Block Assembly (Marine, includes keys #3 - 18, 28) -
110101310 1 Cylinder Block Assembly (Industrial, includes keys #3- 18, 28) -
3 064210025 1 Expansion Plug 25 mm -
4 064210040 4 Expansion Plug 40 mm -
5 198466010 2 Plug -
6 198466020 4 Plug -
7 198466030 4 Plug -
8 165296220 1 Idle Gear Shaft Assembly -
9 198517222 1 Bushing, Standard -
198517226 1 Bushing, Undersized 0.25 mm -
198517229 1 Bushing, Undersized 0.50 mm -
10 040306203 1 Bearing -
11 064100045 1 Expansion Plug -
12 030500612 2 Dowel Pin -
13 030500616 2 Dowel Pin -
14 030501025 2 Dowel Pin -
15 030309005 2 Spring Pin -
16 012110820 2 Stud -
17 012110635 1 Stud -
18 012110660 1 Stud -
19 110996820 1 Gasket -
20 198636170 1 Oil Seal -
21 198486770 1 Bushing -
22 140546020 1 Filter Joint -
23 24-03100 1 Oil Filter Assembly -
24 120116160 6 Tappet -
25 120456250 6 Push Rod -
26 140036220 1 Relief Valve Assembly -
27 052109078 1 O-ring -
28 042309013 1 Needle Bearing -
29 198736050 1 Drain Cock -
30 068105250 1 Tube -
31 052109113 2 O-ring -
32 110756140 1 Dipstick Tube -
33 011310612 1 Bolt -
34 198416320 1 Dipstick -
35 110707450 1 Oil Pan (Marine) up to s/n xxxx-46623C
36-73104 1 Oil Pan (Marine) from s/n xxxx-46624C
110707390 1 Oil Pan (Industrial) -
36 010109235 26 Bolt
(Marine & Industrial) -
37 010411212 2 Plug, Hex Head M12 x 1 (Industrial) -
38 025100012 2 Seal Washer (Industrial) -
39 18-72004 1 Oil Drain Hose -
40 21-00003 1 Cap -
41 23-72003 1 Bracket up to s/n xxxx-46623C
42 12-00311 1 Capscrew, Hex Head 3/8- 16 x 3/4” -
43 15-00302 1 Lock Washer 3/8” -
}
revised 12-7-10

P843-3 5/13
GROUP 1 – ENGINE
Crankshaft and Flywheel Assembly
843NW3crankshaft
1 - 2

P843-3 5/13
1 - 3
GROUP 1 – ENGINE
Crankshaft and Flywheel Assembly
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1115256580 1 Crankshaft Assembly (includes keys 2- 5) -
2 115276200 1 Crankshaft Gear -
3 034100508 1 Key -
4 030509020 1 Dowel Pin -
5 030300816 1 Spring Pin -
6 110156171 1 Bearing Holder Assembly (includes keys 9 &12) -
7 110156181 1 Bearing Holder Assembly (includes keys 9 &12) -
8 110156191 1 Bearing Holder Assembly (includes keys 9 &12) -
9 030500612 6 Dowel Pin -
10 198517232 3 Bearing; Standard (Upper) -
198517236 3 Bearing; Undersized 0.25 mm (Upper) -
198517239 3 Bearing; Undersized 0.50 mm (Upper) -
11 198517242 3 Bearing; Standard (Lower) -
198517246 3 Bearing; Undersized 0.25 mm (Lower) -
198517249 3 Bearing; Undersized 0.50 mm (Lower) -
12 010109406 6 Bolt -
13 010109667 2 Bolt -
14 010700865 2 Bolt -
15 199266200 2 Thrust Washer -
16 115107970 3 Piston Ring Kit, Standard -
17 115017541 3 Piston Kit, Standard (formerly #115017540) -
18 115326220 3 Piston Pin -
19 036500028 6 Snap Ring -
20 115026251 3 Connecting Rod Assembly (includes keys 21-23) -
21 198517265 3 Bushing -
22 115176140 6 Connecting Rod Bolt -
23 020109120 6 Nut -
24 198517252 6 Bearing, Standard -
198517256 6 Bearing, 0.25 mm -
198517259 6 Bearing, 0.50 mm -
25 115397390 1 Crankshaft Pulley (Marine) -
115396810 1 Crankshaft Pulley (Industrial) -
26 020109086 1 Nut -
27 115357040 1 Flywheel Assembly (includes key 28) -
28 115376040 1 Ring Gear (109 Teeth) -
29 010109341 6 Bolt -

P843-3 5/13
1 - 4
1
2
3
6
4
5
GROUP 1 – ENGINE
Kit, Oil Drain and Valve
KEY PART NUMBER QTY DESCRIPTION S/N
1 36-72012 1 Ball valve, Brass 90 Deg 1/4NPT Male X 1/4NPT Female -
2 21-71203 1 Male Connector Brass 1/4NPT X 3/8HB Push-On -
3 18-71207 1 Hose 3/8”ID X 7” Push-On -
4 21-31624 1 Plug, Hex Head, Brass 1/4NPT -
5 21-00612 1 Male Connector, Stl. 1/4NPT X 3/8-37T -
6 21-71034 1 Female Swivel, Brass. 3/8HB X 3/8-37T Push-On -
b-9826
M843N From S/N xxxx-46624C
added 12-7-10

P843-3 5/13
1 - 5
GROUP 1 – ENGINE
Notes
added 12-7-10

P843-3 5/13
GROUP 1 – ENGINE
Camshaft and Oil Pump
843NW3oilpump
1 - 6

P843-3 5/13
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 120026740 1 Camshaft Assembly (includes keys 2- 6) -
2 120016050 1 Cam Gear -
3 034100508 1 Key -
4 120736081 1 Gear -
5 199216230 3 Spacer -
6 040156304 1 Bearing -
7 125256120 1 Slider -
8 199566651 1 Plate -
9 011310612 2 Bolt -
10 165026230 1 Idle Gear Assembly (includes key #12) -
11 199266270 1 Thrust Washer -
12 198217760 1 Spring -
13 140166250 1 Rotor -
14 140116220 1 Oil Pump Cover -
15 199286150 1 Shim; t = 0.10 -
199286160 1 Shim; t = 0.15 -
199286170 1 Shim; t = 0.20 -
199286180 1 Shim; t = 0.50 -
16 198216720 1 Spring -
17 199236540 1 Collar -
18 036800010 1 Snap Ring -
19 165166640 1 Front Plate - Marine (white) -
165166630 1 Front Plate - Industrial (blue) -
20 165996540 1 Gasket -
21 011300612 2 Bolt
22 052109076 1 O-ring -
23 140986970 1 Oil Pipe -
24 140406310 1 Suction Filter Assembly -
25 011310612 2 Bolt -
GROUP 1 – ENGINE
Camshaft and Oil Pump
1 -7

P843-3 5/13
1 - 8
843NW3cylhead
GROUP 1 – ENGINE
Cylinder Head

P843-3 5/13
1 - 9
GROUP 1 – ENGINE
Cylinder Head
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 111011260 1 Cylinder Head Assembly (Marine, includes keys 1-14) -
111011280 1 Cylinder Head Assembly (Industrial, includes keys 1-14) -
2 064210018 5 Expansion Plug, 18 mm -
3 064210030 2 Expansion Plug, 30 mm -
4 064210025 4 Expansion Plug, 25 mm -
5 064210010 2 Expansion Plug, 10 mm -
6 120166380 3 Intake Valve (former # 120166350) -
7 120176380 3 Exhaust Valve (former # 120176360) -
8 120406070 3 Valve Guide Seal - Intake -
9 198216700 6 Spring -
10 120186080 6 Retainer -
11 120226070 12 Cotter -
12 120406050 3 Valve Guide Seal - Exhaust -
13 120216041 6 Cap -
14 110136400 3 Valve Seat - Intake -
15 111147491 1 Head Gasket t=1.3 mm -
111147501 1 Head Gasket t=1.4 mm -
16 111136480 11 Head Bolt -
17 111136490 3 Head Bolt -
18 195816340 1 Lifting Eye (Marine) -
195816030 1 Lifting Eye (Industrial) -
19 011510816 1 Bolt -
revised 1-26-10

P843-3 5/13
1 -10
Rocker Arm Assembly
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 120036990 1 Rocker Arm Assembly (Marine, includes keys 2-7, 16-17) -
120037070 1 Rocker Arm Assembly (Industrial, includes keys 2-7, 16-17) -
2 120356131 3 Intake Rocker Arm -
3 120356141 3 Exhaust Rocker Arm -
4 199486220 6 Screw -
5 020109076 6 Nut -
6 120316281 1 Rocker Arm Shaft -
7 198217170 2 Spring -
8 011310635 2 Bolt -
9 012109044 3 Stud -
10 023100010 3 Nut -
11 1 Oil Pressure Switch (see Electrical System) -
12 140606941 1 Oil Pipe Assembly -
13 140996260 4 Sealing Washer -
14 198486780 1 Banjo Bolt -
15 120996140 1 Gasket -
16 052109076 1 O-ring -
17 199280300 4 Shim -
18 198487590 1 Banjo Bolt (Tapped 1/8 NPT) -
19 064500010 1 Plug -
843NW3rockerarm
GROUP 1 – ENGINE

P843-3 5/13
1 - 11
GROUP 1 – ENGINE
Rocker Arm Cover
843NW3rockercover
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 111217780 1 Rocker Arm Cover -
2 111996410 1 Gasket -
3 110666210 1 Oil Stopper -
4 110666060 1 Steel Wool -
5 015600406 6 Screw -
6 140996270 3 Gasket -
7 024600010 3 Cap Nut -
8 198436010 1 Cap -
9 052100400 1 O-ring -
10 110566080 1 Breather Valve -
11 011100408 4 Bolt -
12 011310660 2 Bolt -
13 011310640 2 Bolt -
14 190196630 1 Caution Plate -
Marine

P843-3 5/13
1 - 12
GROUP 1 – ENGINE
Rocker Arm Cover
843NW3rockercoverind
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 111217820 1 Rocker Arm Cover -
2 111996410 1 Gasket -
3 110666210 1 Oil Stopper -
4 110666060 1 Steel Wool -
5 015600406 6 Screw -
6 140996270 3 Gasket -
7 024600010 3 Cap Nut -
8 198436010 1 Cap -
9 052100400 1 O-ring -
10 110566080 1 Breather Valve -
11 011100408 4 Bolt -
12 011310660 2 Bolt -
13 011310640 2 Bolt -
14 190196630 1 Caution Plate -
15 135996950 1 Gasket -
16 135566550 1 Air Intake -
17 011310620 2 Bolt -
Industrial

P843-3 5/13
2 - 1
GROUP 2 – INTAKE AND EXHAUST
Air Filter and Housing
Marine
A-10262, A-10312 / C-5444
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 10-22004 1 Connector, Air Inlet -
2 135996950 1 Gasket, Air Intake Mounting -
3 12-01131 2 Capscrew, Hex Head M6 x 1.0 x 20 mm -
4 15-99131 2 Wave Washer M6 S/S -
5 18-22002 1 Hose 1-3/4" ID x 2-1/4" -
6 19-01028 2 Hose Clamp #28 -
7 10-22006 1 Front Cover, Air Filter Housing -
8 28-22001 1 Plate, Air Filter Bafe -
9 24-22009 1 Element, Air Filter -
10 24-22011 1 Screen, Air Filter Retaining -
11 10-22003 1 Rear Cover, Air Filter Housing -
12 12-09132 4 Capscrew, Hex Head M6 x 1.0 x 85 mm S/S -
13 15-99131 4 Wave Washer M6 S/S -
14 23-22001 1 Bracket, Air Filter Support -
15 12-09751 4 Capscrew, Hex Head M8 x 1.25 x 16 mm S/S -
16 15-99707 4 Wave Washer M8 S/S -
17 18-22001 1 Hose, Air Intake (Molded) -
18 19-01028 1 Hose Clamp #28 -
19 19-70028 1 Cushion Clamp #28 -
20 12-01102 1 Capscrew, Hex Head M6 x 1.0 x 16 mm S/S -
21 15-01134 1 Flat Washer, M6 S/S -

P843-3 5/13
2 - 2
GROUP 2 – INTAKE AND EXHAUST
Air Filter and Mounting
Industrial
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 135016300 1 Air Filter Assembly (includes keys #13 - 16) -
2 19-00036 2 Clamp #36 -
3 135597860 1 Hose -
4 135876600 1 Bracket -
5 135976420 1 Bracket -
6 195816100 1 Lifting Eye -
7 011510820 2 Bolt -
8 011510816 4 Bolt -
9 011510825 1 Bolt -
10 026100008 4 Washer -
11 011510825 2 Bolt -
12 011510820 1 Bolt -
13 135326197 1 Housing -
14 24-27302 1 Element -
15 135326199 1 Cover Assembly -
16 314531163 1 Valve -
843NW3aircleaner