CUMMINS N14 Specifications Page 539
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Connecting Rod - Twist:
• (Without Bushing) 0.50 MAX 0.020
• (With Bushing) 0.25 MAX 0.010
The instructions for performing a magnetic crack inspection of the connecting rod is provided in
Group 01. Refer to Connecting Rods - Magnetic Inspection (01-15), Page 1-109.
Camshaft Bushing Journal O.D. 63.37 MIN 2.495
63.42 MAX 2.497
Camshaft Thrust Washer Thickness 2.29 MIN 0.090
2.49 MAX 0.098
Camshaft Gear Bore I.D.
• Flanged Camshaft 44.455 MIN 1.7502
44.475 MAX 1.7510
• Flangeless Camshaft 45.662 MIN 1.7977
45.682 MAX 1.7985
Camshaft Gear Press Fit O.D.
• Flanged Camshaft 44.526 MIN 1.7530
44.539 MAX 1.7535
• Flangeless Camshaft 45.733 MIN 1.8005
45.745 MAX 1.8010
The instructions for performing a magnetic crack inspection of the camshaft and camshaft gear is
provided in Group 01. Refer to Camshaft - Magnetic Inspection (01-18), Page 1-118 and Camshaft
Gear - Magnetic Inspection (01-19), Page 1-123.
Specifications Cylinder Block - Rebuild Specifications
NT 855 Page 18-35
Part or Assembly Ref. Point mm in
- Foreword 2
- TABLE OF CONTENTS 3
- Section I - Introduction 5
- Manual Organization 6
- General Repair Instructions 7
- General Safety Instructions 8
- Symbols Used in this Manual 9
- Illustrations 13
- Glossary Of Terms 14
- Engine Identification 16
- Engine Diagrams 17
- N14Page i-14 18
- N14 Page i-15 19
- General Cleaning Instructions 20
- Engine Disassembly (00-01) 30
- Coolant - Drainage 31
- Coolant Filter - Removal 31
- Crankcase Breather - Removal 32
- Turbocharger - Removal 32
- Exhaust Manifold - Removal 33
- Starting Motor - Removal 33
- Fan and Fan Spacer - Removal 33
- Alternator Belts - Removal 33
- Alternator - Removal 34
- Water Header Covers - Removal 36
- Flywheel - Removal 38
- Flywheel Housing - Removal 39
- Rear Cover - Removal 40
- Fan Belts - Removal 40
- - Removal 41
- Water Pump Belt - Removal 41
- Thermostat Housing - Removal 42
- Outlet Tubes - Removal 42
- Water Pump - Removal 43
- Vibration Damper - Removal 43
- (ECM) - Removal 48
- CELECT™ Ambient Air Pressure 48
- Sensor - Removal 48
- Fuel Pump - Removal 49
- Air Compressor - Removal 50
- Viscosity Sensor - Removal 52
- Intake Manifold - Removal 53
- Engine Brakes - Removal 54
- Valve Crossheads - Removal 55
- Push Tubes - Removal 55
- Injectors - Removal 55
- Fuel Crossovers - Removal 57
- Cylinder Heads - Removal 57
- Lubricating Oil Pan - Removal 59
- Gear Cover - Removal 59
- Camshaft - Removal 59
- Cylinder Liners - Removal 62
- Crankshaft - Removal 64
- Engine Assembly (00-02) 66
- Crankshaft - Installation 68
- Rear Cover - Installation 85
- Bore Alignment - Measurement 88
- Face Alignment - Measurement 90
- Flywheel - Installation 92
- Cylinder Heads - Installation 96
- Camshaft - Installation 98
- Timing Tool Installation 102
- (EPS) - Installation 111
- Gear Cover - Installation 112
- Injectors - Installation 120
- STC Engines 121
- Push Tubes - Installation 122
- Installation 124
- Injector and Valve Adjustment 125
- Engine Brake - Installation 135
- Engine Brake - Adjustment 135
- C-Brake - Alternate Method 138
- Jacobs Brake 139
- Sensor - Installation 141
- Fuel Tubing - Installation 143
- Air Compressor - Installation 144
- Fuel Pump - Installation 144
- Water Pump - Installation 153
- Adjustment 154
- - Installation 155
- Outlet Tubes - Installation 155
- Alternator - Installation 162
- Starting Motor - Installation 164
- Turbocharger - Installation 165
- Coolant Filter - Installation 167
- Section Contents 169
- N14Page 1-6 174
- Dowel Pin - Removal 178
- Camshaft Bushings - Removal 179
- Cylinder Block - Cleaning 179
- Camshaft Bore - Cleaning 183
- Camshaft Bore - Inspection 183
- Cylinder Block - Inspection 188
- Coolant Passage - Inspection 189
- Coolant Passage - Repairing 191
- Dowel Pin - Installation 202
- Cleaning 204
- Inspection 206
- Inspection (01-09) 215
- Alignment - Inspection 216
- Twist - Inspection 217
- Inspection (01-11) 219
- Inspection (01-12) 220
- Inspection (01-13) 221
- Inspection (01-16) 230
- Thrust Bearings - Inspection 231
- Cylinder Head - Service Tools 244
- Cylinder Head - Exploded View 248
- Disassembly 252
- Grinding the Valve Seats 259
- Assembly 263
- Guides (02-03) 267
- Seat Inserts (02-05) 269
- Sleeves (02-07) 273
- Checking (02-09) 279
- Seating for Reuse (02-10) 280
- Crack Inspection (02-11) 282
- Checking for Reuse (02-12) 283
- Inspection (02-13) 284
- N14Page 3-4 288
- Cleaning and Inspection 292
- Rocker Lever - Magnetic Crack 298
- Inspection (03-03) 298
- Inspection for Reuse (03-04) 298
- Water Manifold Tube - Removal 299
- Inspection for Reuse (03-06) 303
- Replacement (03-08) 305
- Inspection - Magnetic Crack 319
- Inspection - Dimensional 319
- Cleaning - PT Fuel Pump 328
- Cleaning - CELECT™ Fuel Pump 329
- Inspection - PT Fuel Pump 329
- Fuel Pump - Rebuild (05-02) 332
- Inspection for Reuse (06-01) 339
- Inspection - CELECT™ 340
- Injectors - Rebuild (06-02) 341
- Reuse (06-05) 342
- Inspection for Reuse (07-01) 350
- Inspection for Reuse (07-05) 352
- Bushing - Replacement (07-07) 361
- Bushing - Replacement (07-08) 367
- Shaft - Replacement (07-09) 368
- Replacement (07-10) 369
- Rebuild (07-11) 370
- Testing - Oil Cooler Core 375
- Poppet Valve Spring 377
- Inspection (08-01) 386
- Water Pump Assembly - Rebuild 387
- Inspection (08-05) 399
- Inspection (08-09) 404
- Drive Units - Service Tools 406
- Accessory Drive 408
- Inspection for Reuse (09-01) 409
- Inspection for Reuse (09-04) 417
- Replacement (09-05) 417
- Checking (10-02) 426
- - Checking (10-03) 426
- Inspection for Reuse (11-01) 431
- Exhaust Manifold Turbocharger 432
- Air Compressor 434
- Air Compressor - Cleaning and 435
- Inspection for Reuse (12-01) 435
- General Information 442
- Cummins 1991 N14 Heavy Duty 443
- Engine Operating Curve 443
- Definitions: 443
- General Run-In Procedures 444
- Fuel Rate 452
- Fuel Inlet Restriction 452
- Fuel Pressure 453
- Fuel Drain Line Restriction 453
- Systems (14-02) 458
- Dynamometer (14-03) 464
- Dynamometer Worksheet 468
- Chassis Dynamometer Operation 469
- Dynamometer (14-05) 471
- Intake Manifold Pressure 474
- Charge Air Cooler Restriction 475
- Intake Air Restriction 475
- Exhaust Air Restriction 476
- Engine Blowby 476
- Lubricating Oil Pressure 477
- Coolant Pressure 477
- Dynamometer (14-06) 478
- Dynamometer (14-07) 481
- Engine Painting (14-08) 482
- Air Heaters 490
- Coolant Heaters 490
- Engine Protection Controls 490
- Fuel Warmers 490
- Oil Heaters 491
- Reuse (16-01) 496
- Inspection for Reuse (16-03) 497
- Flywheel Housing - Redowel to 498
- Cylinder Block (16-04) 498
- Specifications - Group 18 505
- General Engine Specifications 507
- Exhaust System 508
- Fuel System 508
- Electrical System 508
- Pipe Plug Torque Values 510
- NT 855 Page 18-9 513
- Page 18-10 NT 855 514
- NT 855 Page 18-11 515
- Page 18-12 NT 855 516
- NT 855 Page 18-13 517
- Page 18-14 NT 855 518
- NT 855 Page 18-15 519
- Page 18-16 NT 855 520
- NT 855 Page 18-17 521
- Page 18-18 NT 855 522
- NT 855 Page 18-19 523
- Page 18-20 NT 855 524
- NT 855 Page 18-21 525
- Page 18-22 NT 855 526
- NT 855 Page 18-23 527
- Page 18-24 NT 855 528
- NT 855 Page 18-25 529
- Page 18-26 NT 855 530
- NT 855 Page 18-27 531
- Page 18-28 NT 855 532
- NT 855 Page 18-29 533
- Page 18-30 NT 855 534
- NT 855 Page 18-31 535
- Page 18-32 NT 855 536
- NT 855 Page 18-33 537
- Page 18-34 NT 855 538
- NT 855 Page 18-35 539
- Page 18-36 NT 855 540
- NT 855 Page 18-37 541
- Page 18-38 NT 855 542
- NT 855 Page 18-39 543
- Page 18-40 NT 855 544
- NT 855 Page 18-41 545
- Page 18-42 NT 855 546
- Cylinder Head - Torque Values 547
- Page 18-44 NT 855 548
- ST-1182 549
- NT 855 Page 18-45 549
- Fixed Injection Timing 550
- MVT Injection Timing 550
- NT 855 Page 18-47 551
- Page 18-48 NT 855 552
- NT 855 Page 18-49 553
- Page 18-50 NT 855 554
- NT 855 Page 18-51 555
- Page 18-52 NT 855 556
- NT 855 Page 18-53 557
- Page 18-54 NT 855 558
- NT 855 Page 18-55 559
- Page 18-56 NT 855 560
- NT 855 Page 18-57 561
- Page 18-58 NT 855 562
- NT 855 Page 18-59 563
- Page 18-60 NT 855 564
- NT 855 Page 18-61 565
- Cooling System -Torque Values 566
- NT 855 Page 18-63 567
- Page 18-64 NT 855 568
- NT 855 Page 18-65 569
- Page 18-66 NT 855 570
- NT 855 Page 18-67 571
- JacobsW Engine Brake 573
- Cummins C Brake 573
- Component Manufacturers 574
- N14Page C-2 575
- Torque Converters 576
- Additional Service Literature 578
- Order Total 580
- Page X-1 582
- Page X-2 583
- Page X-3 584
- Page X-4 585
- BUSINESS REPLY MAIL 586
- Literature Survey Form 587
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