P843K
For Models: M843NK, NL843NK,
M843JK, and NL843JK
PARTS CATALOG
Marine Generators | Marine Diesel Engines | Land-Based Generators
— CALIFORNIA —
Proposition 65 Warning:
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.
Northern Lights
4420 14th Avenue N.W.
Seattle, WA 98107
Tel: (206) 789-3880
Fax: (206) 782-5455
Copyright ©2003 Alaska Diesel Electric, Inc.
All rights reserved. Northern Lights™, and
the Northern Lights logo are trademarks of
Alaska Diesel Electric, Inc.
Printed in U.S.A.
PART NO.: P843K 12/03
PARTS CATALOG
for Models
M843nk, NL843nk, M843jk, and NL843jk
Please read thoroughly before aempting to use this manual:
Table of Contents ............................................................................................................................................ I
Model Designation & Serial Numbers .............................................................................................................. II
Reading a Parts Page ..................................................................................................................................... III
Table of Contents
GROUP 1 - ENGINE
Cylinder Block Assembly ......................... 0 - 3
Crankshaft Assembly ............................... 4 - 7
Camshaft and Oil Pump ............................8 - 9
Cylinder Head ...................................... 10 - 11
Rocker Arm ......................................... 12 - 13
GROUP 2 - INTAKE & EXHAUST SYSTEM
Air Intake and Filter ....................................... 0
Intake Manifold ............................................. 1
Air Filter and Mounting ............................2 - 4
Exhaust Manifold and Mufer ........................ 5
GROUP 3 - COOLING SYSTEM
Exhaust Manifold and Heat Exchanger ....... 0 - 1
Coolant Pump ............................................... 2
Coolant Pump and Thermostat Housing ........... 3
Raw Water Pump and Mounting ................. 4 - 5
Radiator and Guard ................................... 6 - 7
GROUP 4 - FUEL SYSTEM
General Arrangement ............................... 0 - 3
Governor and Timing Gear Case ................ 4 - 5
Fuel Filter and Piping ..................................... 6
Fuel Line Connection ..................................... 7
Coast Guard Fuel Line Connection .................. 8
Fuel Injection Pump ....................................... 9
Fuel Injector ................................................ 10
Fuel Feed Pump .......................................... 11
GROUP 5 - ELECTRICAL SYSTEM
12 Volt Engine ............................................... 0
Alternator and Starter ..................................... 1
Alternator ..................................................... 2
Starter Assembly ........................................... 3
Alternator Assembly ...................................... 4
Control Panels .......................................... 5 - 8
Belt Guard Assembly .............................. 9 - 10
GROUP 6 - GASKET SETS
Gasket Kit ..................................................... 0 - 1
GROUP 7 - GEAR AND ADAPTER SETS
Not available at this time.
GROUP 8 - FRAME & MOUNTING
Base Frame Assembly ............................... 0 - 1
GROUP 9 - ACCESSORIES
GROUP 9 - & OPTIONAL EQUIPMENT
PTO Adapter ............................................ 0 - 1
Electric Clutch ............................................ 2
Oil Drain Kit ................................................. 3
Remote Expansion Tank ................................. 4
Keel Cooling Conversion ............................... 5
Coolant Recovery Tank .................................. 6
Proprietary Information
This publication is the property of Alaska Diesel Electric, Inc.
It may not be reproduced in whole or in part without the written permission of Alaska Diesel Electric, Inc.
© Alaska Diesel Electric, Inc. All rights reserved. Litho U.S.A. Publication number P843K 12/03
P843K 12/03
I
INTRODUCTION
MODEL DESIGNATION
MODELS INCLUDED
This manual covers the operating instructions for:
M843nk and NL843nk , which both use the 843n engine;
and M843jk and NL843jk , which both use the 843j engine.
MODEL NUMBERS
Model numbers give the unit's application, block model, aspiration, and RPM:
M - NL 843 N
M - Northern Lights marine generator set
NL - Northern Lights industrial generator set
M843nk
M843jk
Northern Lights marine diesel generator set
with an 843n engine and a PXK generator.
Northern Lights marine diesel generator set
with an 843j engine and a PXK generator.
Model number of engine block
Bore Cylinders
84 mm 3
NL843nk
NL843jk
Northern Lights industrial diesel generator set
with an 843n engine and a PXK generator.
Northern Lights industrial diesel generator set
with an 843j engine and a PXK generator.
Additional letters
designate a series
within model number.
SERIAL NUMBERS
NORTHERN LIGHTS
Your set has three serial numbers: 1 an engine number stamped on the block, 2 a generator plate,
and 3 a 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.
Generator Set Serial Number
for units with PXK
generators
P843K 12/03
II
INTRODUCTION
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.
1
ELECTRICAL SYSTEM
ALTERNATOR ASSEMBLY: M - NL844K
4
6
5
KEY PART NUMBER QTY. DESCRIPTION SERIALNUMBER
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 -
7
8
10
3
2
9
13
11
P844K 06/96
5-2
14
12
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 identication. 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: a Arrows always point toward the front of the engine.
P843K 12/03
III
GROUP 1 – ENGINE
Cylinder Block Assembly M843JK
P843K 12/03
1 - 0
Fig. 01-00
GROUP 1 – ENGINE
Cylinder Block Assembly M843JK
KEY PART NUMBER QTY DESCRIPTION S/N
1 110103172 1 Cylinder Block Assembly (Includes keys #2 - #21, formerly #110103170 & 3171) -
2 064200015 1 Expansion Plug 15 mm 3 064200025 1 Expansion Plug 25 mm 4 064200040 4 Expansion Plug 40 mm 5 198466010 2 Blank Plug 6 198466020 3 Blank Plug 8 198466070 4 Blank Plug 9 165296131 1 Idle Gear Shaft Assembly 10 064410010 1 Plug 11 198517191 1 Bush; S.T.D.
198517195 1 Bush; U.S. 0.25
198517198 1 Bush; U.S. 0.50
12 040106203 1 Bearing 13 064100045 1 Expansion Plug 14 042309013 1 Bearing 15 030500612 2 Dowel Pin 16 030500616 2 Dowel Pin 17 030501025 2 Dowel Pin 18 030309005 2 Spring Pin 19 010109441 2 Stud Bolt 20 012110635 1 Stud Bolt 21 012110660 1 Stud Bolt 23 110996820 1 Gasket 24 198636170 1 Oil seal 25 198736120 1 Drain Cock, brass 26 140546020 1 Joint 27 24-03100 1 Oil Filter 28 120116160 6 Tappet 29 120456222 6 Push Rod 30 140036220 1 Relief Valve Assembly
31 052109078 1 O-ring 32 068115250 1 Tube 33 110707450 1 Oil Pan 34 010109235 26 Bolt 37 110756140 1 Dipstick Tube 38 052100100 2 O-ring 39 011300612 1 Bolt 40 198416320 1 Dipstick 41 052109076 1 O-ring 42 140986530 1 Oil Pipe 43 140406310 1 Suction Filter 44 011310612 2 Bolt 45 198486770 1 Bushing 46 140606710 1 Oil Drain Hose 47 198756200 1 Hose Clamp 48 052100280 1 O-ring
49 398430560 1 Cap 50 140976040 1 Bracket 51 011500812 1 Bolt 52 199436350 1 Bolt 53 027100010 1 Spring Washer 54 130976310 1 Bracket -
(formerly #198517190) -
(formerly #198517194) -
(formerly #198517197) -
(formerly #140036120) -
(formerly #054109013) -
P843K 12/03
1 - 1
GROUP 1 – ENGINE
Cylinder Block Assembly M - NL843NK
P843K 12/03
1 - 2
Fig. 01-02
GROUP 1 – ENGINE
Cylinder Block Assembly M - NL843NK
KEY PART # QTY DESCRIPTION SERIAL #
1 110107645 1 Cylinder Block Complete - Marine (white, formerly #110107643 & 44) -
110107604 1 Cylinder Block Complete - Industrial
(blue, formerly 110107602 & 03) -
2 064200015 1 Expansion Plug 15 mm 3 064200025 1 Expansion Plug 25 mm 4 064200040 4 Expansion Plug 40 mm 5 198466010 2 Blank Plug 6 198466020 3 Blank Plug 7 010109238 1 Plug, Hex Head M16 x 1.5
(use with Pan #110707391) -
8 198466070 4 Blank Plug 9 165296130 1 Idle Gear Shaft Complete 10 198466060 ** Bush 11 198517221 1 Bush; S.T.D.
198517225 1 Bush; U.S. 0.25
198517228 1 Bush; U.S. 0.50
(formerly #198517220) -
(formerly #198517224) -
(formerly #198517227) -
12 040106203 1 Bearing 13 064100045 1 Expansion Plug 14 042309013 1 Bearing 15 030500612 2 Dowel Pin 16 030500616 2 Dowel Pin 17 030501025 2 Dowel Pin 18 030309005 2 Spring Pin 19 012100820 2 Stud Bolt 20 012100635 1 Stud Bolt 21 012100660 1 Stud Bolt 22 064410010 ** Plug 23 110996820 1 Gasket
(formerly #110996560) -
24 198636170 1 Oil seal 25 198736120 1 Drain Cock, brass - Marine 198736052 1 Drain Cock, zinc - Industrial 26 140546020 1 Joint 27 24-03100 1 Oil Filter 28 120116160 6 Tappet 29 120456231 6 Push Rod 30 140036220 1 Relief Valve Assembly
(formerly #140036120) -
31 052100150 1 O-Ring 32 068115250 1 Tube 33 110707450 1 Oil Pan - Marine
110707391 1 Oil Pan - Industrial
(white) -
(blue) -
34 010109235 26 Bolt 35 010401212 ** Plug, Hex Head M12 x 1.25 36 025100012 ** Seal Washer - Industrial 025100016 1 Seal Washer - Industrial
(use with pan #11070391) -
37 110756140 1 Dipstick Tube 38 052100100 2 O-Ring 39 011300612 1 Bolt 40 198416320 1 Dipstick 41 052109076 1 O-Ring 42 140986530 1 Oil Pipe 43 140406310 1 Suction Filter 44 011310612 2 Bolt 45 198486770 1 Bushing 46 140606710 1 Oil Drain Hose* 47 198756200 1 Hose Clamp* 48 054109013 1 O-Ring* 49 398430560 1 Cap* 50 140976040 1 Stay* 51 011300812 1 Bolt* 52 199436350 1 Bolt* 53 027100010 1 Spring Washer* 54 130976310 1 Bracket* -
* *Items #46 through #54: Marine only.
**As required.
(Includes
}
(keys #2- #21)
P843K 12/03
1 - 3
GROUP 1 – ENGINE
Crankshaft Assembly M843JK
P843K 12/03
1 - 4
Fig. 1-4
GROUP 1 – ENGINE
Crankshaft Assembly M843JK
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 115256590 1 Crankshaft Assembly (includes keys #2, #4 & #24) 2 115276200 1 Crankshaft Gear 3 034100508 1 Key 4 030509020 1 Dowel Pin 5 110156161 1 Bearing Holder Assembly
6 010109406 6 Bolt 7 030500612 6 Dowel Pin 8 110156141 1 Bearing Holder Assembly
9 110156151 1 Bearing Holder Assembly
10 198517211 3 Bearing; S.T.D.
(formerly #198517210) -
198517215 3 Bearing; U.S. 0.25 mm
198517218 3 Bearing; U.S. 0.50 mm
11 198517201 3 Bearing; S.T.D.
(formerly #198517200) -
198517205 3 Bearing; U.S. 0.25 mm
198517208 3 Bearing; U.S. 0.50 mm
12 199266190 2 Thrust Washer 13 011311070 2 Bolt 14 010700865 2 Bolt 15 115107840 3 Ring Kit; S.T.D. 115107293 3 Ring Kit; O.S. 0.50 mm 115107295 3 Ring Kit; O.S. 1.00 mm 16 115017360 3 Piston Kit; S.T.D. 115016714 3 Piston Kit; O.S. 0.50 mm 115016717 3 Piston Kit; O.S. 1.00 mm 17 115326030 3 Piston Pin 18 036500025 6 Snap Ring 19 115026212 3 Connecting Rod Assembly
20 198517060 3 Bush 21 115176140 6 Connecting Rod Bolt 22 020109120 6 Nut 23 198517181 6 Bearing; S.T.D.
(formerly #198517180) -
198517185 6 Bearing; U.S. 0.25
198517188 6 Bearing; U.S. 0.50
24 030300816 1 Spring Pin 25 115397900 1 Crankshaft Pulley 26 020109086 1 Nut 28 115357730 1 Flywheel Assembly SAE #7-1/2
29 115376040 1 Ring Gear
(109 teeth) -
30 010109341 6 Bolt 31 1 Drive Belt
(see Alternator & Mtg.) -
(includes keys #6 & #7) -
(includes keys #6 & #7) -
(includes keys #6 & #7) -
(formerly #198517214) -
(formerly #198517217) -
(formerly #198517204) -
(formerly #198517207) -
(includes keys #20 - #22) -
(formerly #198517184) -
(formerly #198517187) -
(includes key #29) -
P843K 12/03
1 - 5
GROUP 1 – ENGINE
Crankshaft Assembly M - NL843NK
P843K 12/03
1 - 6
Fig. 1-6
GROUP 1 – ENGINE
Crankshaft Assembly M - NL843NK
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 115256580 1 Crankshaft Assembly (includes keys #2, #4 & #24) 2 115276200 1 Crankshaft Gear 3 034100508 1 Key 4 030509020 1 Dowel Pin 5 110156171 1 Bearing Holder Assembly
6 010111055 6 Bolt 7 030500612 6 Dowel Pin 8 110156181 1 Bearing Holder Assembly
9 110156191 1 Bearing Holder Assembly
10 198517231 3 Bearing; Std.
(formerly #198517230) -
198517235 3 Bearing; U.S. 0.25 mm
198517238 3 Bearing; U.S. 0.50 mm
11 198517241 3 Bearing; S.T.D.
(formerly #198517240) -
198517245 3 Bearing; U.S. 0.25 mm
198517248 3 Bearing; U.S. 0.50 mm
12 199266200 2 Thrust Washer 13 011311070 2 Bolt 14 010700865 2 Bolt 15 115107840 3 Ring Kit; Std.
(formerly #115107290) -
115104084 3 Ring Kit; O.S. 0.50 mm
115104087 3 Ring Kit; O.S. 1.00 mm
16 115017370 3 Piston Kit; Std.
(formerly #115016810) -
115016814 3 Piston Kit; O.S. 0.50 mm 115016817 3 Piston Kit; O.S. 1.00 mm 17 115326220 3 Piston Pin 18 036500028 6 Snap Ring 19 115026251 3 Connecting Rod Assembly
20 198517265 3 Bush 21 115176140 6 Connecting Rod Bolt 22 020109087 6 Nut 23 198517251 6 Bearing; Std.
(formerly #198517250) -
198517255 6 Bearing; U.S. 0.25 mm
198517258 6 Bearing; U.S. 0.50 mm
24 030300816 1 Spring Pin 25 115397390 1 Crankshaft Pulley - Marine
115396810 1 Crankshaft Pulley - Industrial
26 020109086 1 Nut 27 026100024 1 Washer
(no longer required) -
28 115357040 1 Flywheel Assembly SAE #7-1/2
29 115376040 1 Ring Gear
(109 teeth) -
30 010109341 6 Bolt 31 1 Drive Belt
(see Alternator & Mtg.) -
(includes keys #6 & #7) -
(includes keys #6 & #7) -
(includes keys #6 & #7) -
(formerly #198517234) -
(formerly #198517237) -
(formerly #198517244) -
(formerly #198517247) -
(formerly #115107293) -
(formerly #115107295) -
(includes keys #20 - #22) -
(formerly #198517254) -
(formerly #198517257) -
(white) -
(blue) -
(includes key #29) -
P843K 12/03
1 - 7
GROUP 1 – ENGINE
Camshaft and Oil Pump
P843K 12/03
1 - 8
Fig. 1-8
GROUP 1 – ENGINE
Camshaft and Oil Pump
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 165026120 1 Idle Gear Assembly (includes keys #14 - 18) 2 199266180 1 Thrust Washer 3 198216821 1 Spring 4 140166140 1 Rotor 5 140116140 1 Oil Pump Cover 6 199286150 1 Shim; t = 0.10 199286160 1 Shim; t = 0.15 199286170 1 Shim; t = 0.20 199286180 1 Shim; t = 0.50 7 198216720 1 Spring 8 199236540 1 Collar 9 036800010 1 Snap Ring 10 165166450 1 Front Plate - Marine
165166290 1 Front Plate - Industrial
11 165996361 1 Gasket
165996540 1 Gasket
(843NK) -
(843JK) -
12 011300612 2 Bolt 13 120026350 1 Camshaft Assembly -
14 120016050 1 Cam Gear 15 034100508 1 Key 16 120736081 1 Gear 17 199216230 3 Spacer 18 040156304 1 Bearing 19 125256120 1 Slider 20 199566651 1 Plate 21 011310612 2 Bolt -
(white) -
(blue) -
P843K 12/03
1 - 9
GROUP 1 – ENGINE
Cylinder Head
P843K 12/03
1 - 10
Fig. 1-9
GROUP 1 – ENGINE
Cylinder Head
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
•• 111017721 1 Cylinder Head Assembly - (843JK) (Includes keys #1 - 13,
formerly #111017720) -
•• 111017301 1 Cylinder Head Assembly -
formerly 111017300 & 111017310)
1 064210020 ** Expansion Plug 20 mm
064210018 ** Expansion Plug 18 mm 2 064200030 2 Expansion Plug 30 mm 3 064200025 4 Expansion Plug 25 mm 4 064200010 2 Expansion Plug 10 mm 5 120166270 3 Intake Valve 6 120176280 3 Exhaust Valve 7 120406070 3 Valve Guide Seal - Intake 8 198216700 6 Spring 9 120186080 6 Retainer 10 120226070 12 Keeper 11 120406050 3 Valve Guide Seal - Exhaust 12 120216040 6 Cap 13 110136251 3 Valve Seat; Intake 14 111147491 1 Head Gasket; t = 1.3 mm
111147501 1 Head Gasket; t = 1.4 mm
15 111136480 11 Head Bolt
16 111136490 3 Head Bolt
(14 mm Hex) -
(14 mm Hex) -
17 195816340 1 Lifting Eye - Marine
195816400 1 Lifting Eye - Marine
195816410 1 Lifting Eye - Industrial
18 011310816 2 Bolt -
(843NK) (Includes keys #1 - 13,
-
(formerly #064200020) -
(formerly #111147490) -
(formerly #111147500) -
(843JK) (white) -
(843NK) (white) -
(843NK) (blue) -
P843K 12/03
1 - 11
GROUP 1 – ENGINE
Rocker Arm Assembly
Fig. 1-10
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
•• 120036622 1 Rocker Arm Assembly - Marine -
•• 120036510 1 Rocker Arm Assembly - Industrial 1 120356200 3 Intake Rocker Arm 2 120356210 3 Exhaust Rocker Arm 3 199486220 6 Screw 4 020109076 6 Nut 5 120346241 1 Rocker Arm Bracket 6 120316210 1 Rocker Arm Shaft 7 198216780 2 Spring 8 199486320 1 Screw 9 198436150 1 Plug 10 052100120 1 O-ring 11 015100412 1 Screw 12 011300635 1 Bolt 13 011300625 1 Bolt 14 012109177 3 Stud 15 023100008 3 Nut 16 1 Oil Pressure Switch
17 140606691 1 Oil Pipe
140606701 1 Oil Pipe
(843JK) -
(843NK) -
(see Electrical System) -
18 140996260 4 Sealing Washer 19 198486780 1 Banjo Bolt 20 052109065 1 Gasket 21 198487590 1 Banjo Bolt 22 199280280 4 Shim
P843K 12/03
1 - 12
GROUP 1 – ENGINE
Rocker Arm Cover
Fig. 1-11a
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 052109064 1 Gasket 3 111026821 1 Rocker Arm Cover - Marine
111026810 1 Rocker Arm Cover - Industrial
4 110666050 1 Oil Stopper 5 110666060 1 Filter 6 011100610 2 Bolt 7 140996260 3 Gasket 8 024500008 3 Cap Nut 9 198436010 1 Cap 10 052100400 1 O-ring 11 140986581 1 Pipe 12 068209156 1 Vent Hose 13 190196630 1 Caution Label -
P843K 12/03
(white - includes keys #4 - #6 & #11) -
(blue - includes keys #4 - #6 & #11) -
1 - 13
GROUP 2 – INTAKE AND EXHAUST
Air Intake and Filter
Marine Application with ENMAA Noise Reduction
A-6636B/C-2939A
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 10-23111 1 Air Intake Manifold 2 24-23103 1 Screen 3 24-23102 1 Air Filter Element 4 28-28101 1 Intake Cover Plate 5 11-28101 1 Gasket 6 12-00751 2 Capscrew, Hex Head M8 x 1.25 x 16 mm 7 15-00701 2 Flat Washer M8 8 12-01134 3 Capscrew, Hex Head M6 x 1.0 x 100 mm 9 12-01136 3 Capscrew, Hex Head M6 x 1.0 x 90 mm 10 15-00008 6 Flat Washer M6 11 135996451 1 Gasket 12 135597200 1 Spacer 13 135996680 1 Gasket 14 18-23102 1 Air Intake Hose 15 19-00020 1 Hose Clamp #20 -
P843K 12/03
2 - 0
GROUP 2 – INTAKE AND EXHAUST
Intake Manifold
anifold an
Industrial Application
P843intakemanifold
KEY PART NUMBER QTY DESCRIPTION SERIAL NUMBER
1 135996451 1 Gasket 2 135597050 1 Spacer - Industrial
3 135996680 1 Gasket 4 030300414 Spring Pin* 5 135597140 1 Intake Manifold 6 027100006 2 Spring Washer 7 010109119 2 Bolt 8 011300660 4 Bolt -
*
No longer required
(Blue) -
P843K 12/03
2 - 1