Description
1996 HMMWV M998 Series Unit Maintenance Manual Volume 2 (TM 9-2320-280-20-2)
This is Volume 2 of 3 of the Unit Maintenance Manual for the HMMWV (High Mobility Multipurpose Wheeled Vehicle) M998 series of 1-1/4 ton, 4×4 utility trucks. It covers Chapters 3 through 9 in full, taking the unit-level mechanic through engine systems, the complete electrical system, transmission and transfer case, propeller shafts, axles, suspension, service and parking brakes, wheels and steering, and frame repairs. The original January 1996 edition is presented here with the Change 1 and Change 2 updates incorporated, so the procedures, torques and illustrations reflect the later production configurations as well as the original setup.
File Details
- Manual type: Unit Maintenance Manual, Volume 2 of 3
- Document numbers: Army TM 9-2320-280-20-2, Air Force TO 36A12-1A-2092-1-2, Marine Corps TM 2320-20/7B
- Equipment: Truck, Utility, Cargo/Troop Carrier, 1-1/4 Ton, 4×4 – M998 series HMMWV
- Chapters covered: 3 through 9
- Language: English
- Page count: 952 pages
- File format: PDF
- Original publication date: 31 January 1996
- Updates included: Change 1 (14 September 1998) and Change 2 (30 June 1999)
Complete PDF Bookmark Tree
Complete Bookmarks
The complete bookmarks in the “1996 HMMWV M998 Series Unit Maintenance Manual Volume 2 (TM 9-2320-280-20-2)” are as follows:
TABLE OF CONTENTSp. 18
WARNINGp. 2
+CHAPTERS
+CHAPTER 3p. 20
PARA 3-2p. 21
PARA 3-3p. 23
PARA 3-4p. 24
PARA 3-5p. 25
PARA 3-6p. 27
PARA 3-7p. 29
PARA 3-8p. 31
PARA 3-9p. 33
PARA 3-10p. 37
PARA 3-12p. 39
PARA 3-13p. 41
PARA 3-14p. 45
PARA 3-15p. 47
PARA 3-16p. 48
PARA 3-17p. 49
PARA 3-18p. 50
PARA 3-19p. 51
PARA 3-20p. 52
PARA 3-21p. 53
PARA 3-22p. 54
PARA 3-23p. 55
PARA 3-24p. 57
PARA 3-25p. 69
PARA 3-26p. 71
PARA 3-27p. 73
PARA 3-28p. 75
PARA 3-29p. 77
PARA 3-30p. 79
PARA 3-31p. 80
PARA 3-32p. 81
PARA 3-33p. 83
PARA 3-34p. 85
PARA 3-35p. 87
PARA 3-36p. 89
PARA 3-37p. 93
PARA 3-38p. 95
PARA 3-39p. 96
PARA 3-40p. 97
PARA 3-42p. 99
PARA 3-43p. 103
PARA 3-44p. 104
PARA 3-45p. 105
PARA 3-47p. 107
PARA 3-48p. 109
PARA 3-49p. 111
PARA 3-50p. 113
PARA 3-51p. 115
PARA 3-52p. 116
PARA 3-53p. 117
PARA 3-54p. 119
PARA 3-55p. 121
PARA 3-56p. 123
PARA 3-57p. 125
PARA 3-58p. 127
PARA 3-60p. 129
PARA 3-61p. 131
PARA 3-62p. 137
PARA 3-63p. 138
PARA 3-64p. 139
PARA 3-65p. 140
PARA 3-66p. 141
PARA 3-67p. 142
PARA 3-68p. 143
PARA 3-69p. 145
PARA 3-70p. 146
PARA 3-71p. 147
PARA 3-72p. 148
PARA 3-73p. 149
PARA 3-74p. 150
PARA 3-75p. 151
PARA 3-76p. 152
PARA 3-76.1p. 153
PARA 3-77p. 157
PARA 3-78p. 159
PARA 3-79p. 161
PARA 3-80p. 162
PARA 3-81p. 163
PARA 3-82p. 165
PARA 3-83p. 167
PARA 3-84p. 171
+CHAPTER 4p. 173
PARA 4-2p. 174
PARA 4-2.1p. 180
PARA 4-2.2p. 182
PARA 4-3p. 194
PARA 4-4p. 196
PARA 4-4.1p. 198
PARA 4-5p. 200
PARA 4-5.1p. 202
PARA 4-5.3p. 205
PARA 4-5.4p. 209
PARA 4-5.5p. 211
PARA 4-5.6p. 215
PARA 4-5.7p. 217
PARA 4-5.8p. 221
PARA 4-5.9p. 223
PARA 4-5.10p. 225
PARA 4-5.11p. 227
PARA 4-5.12p. 229
PARA 4-5.13p. 237
PARA 4-7p. 239
PARA 4-8p. 241
PARA 4-9p. 245
PARA 4-11p. 248
PARA 4-12p. 250
PARA 4-13p. 252
PARA 4-13.1p. 254
PARA 4-13.2p. 256
PARA 4-14p. 258
PARA 4-15p. 260
PARA 4-15.1p. 262
PARA 4-16p. 268
PARA 4-17p. 270
PARA 4-17.1p. 272
PARA 4-18p. 274
PARA 4-19p. 275
PARA 4-20p. 276
PARA 4-21p. 277
PARA 4-22p. 278
PARA 4-23p. 279
PARA 4-24p. 280
PARA 4-25p. 281
PARA 4-26p. 282
PARA 4-27p. 283
PARA 4-28p. 284
PARA 4-29p. 286
PARA 4-30p. 288
PARA 4-31p. 289
PARA 4-32p. 290
PARA 4-33p. 291
PARA 4-34p. 292
PARA 4-36p. 295
PARA 4-37p. 296
PARA 4-38p. 298
PARA 4-39p. 299
PARA 4-40p. 300
PARA 4-41p. 302
PARA 4-42p. 303
PARA 4-42.1p. 304
PARA 4-43p. 306
PARA 4-44p. 308
PARA 4-45p. 310
PARA 4-46p. 312
PARA 4-48p. 315
PARA 4-49p. 317
PARA 4-50p. 319
PARA 4-51p. 321
PARA 4-52p. 323
PARA 4-53p. 325
PARA 4-54p. 326
PARA 4-55p. 327
PARA 4-56p. 329
PARA 4-57p. 331
PARA 4-58p. 332
PARA 4-59p. 333
PARA 4-60p. 335
PARA 4-61p. 337
PARA 4-62p. 339
PARA 4-63p. 340
PARA 4-64p. 341
PARA 4-65p. 343
PARA 4-66p. 344
PARA 4-67p. 345
PARA 4-68p. 346
PARA 4-69p. 347
PARA 4-70p. 349
PARA 4-72p. 351
PARA 4-73p. 353
PARA 4-74p. 359
PARA 4-76p. 364
PARA 4-77p. 365
PARA 4-78p. 369
PARA 4-79p. 371
PARA 4-80p. 373
PARA 4-81p. 375
PARA 4-82p. 379
PARA 4-83p. 381
PARA 4-84p. 383
PARA 4-85p. 391
PARA 4-87p. 395
PARA 4-88p. 397
PARA 4-89p. 399
PARA 4-90p. 401
PARA 4-91p. 403
PARA 4-92p. 405
PARA 4-93p. 407
PARA 4-94p. 409
PARA 4-95p. 411
PARA 4-96p. 413
PARA 4-97p. 419
PARA 4-98p. 425
PARA 4-99p. 431
PARA 4-100p. 439
PARA 4-101p. 449
PARA 4-102p. 459
PARA 4-103p. 469
PARA 4-104p. 471
PARA 4-105p. 473
PARA 4-106p. 475
PARA 4-107p. 481
PARA 4-108p. 487
PARA 4-109p. 493
PARA 4-110p. 499
PARA 4-110.1p. 503
PARA 4-111p. 507
PARA 4-112p. 509
PARA 4-113p. 511
PARA 4-114p. 515
PARA 4-115p. 517
PARA 4-116p. 519
PARA 4-117p. 521
PARA 4-118p. 523
PARA 4-119p. 525
PARA 4-120p. 527
PARA 4-121p. 529
PARA 4-122p. 531
PARA 4-123p. 537
PARA 4-124p. 543
PARA 4-125p. 553
PARA 4-126p. 555
PARA 4-127p. 564
+CHAPTER 5p. 571
PARA 5-2p. 572
PARA 5-3p. 578
PARA 5-4p. 582
PARA 5-5p. 584
PARA 5-6p. 586
PARA 5-7p. 588
PARA 5-8p. 590
PARA 5-9p. 592
PARA 5-10p. 596
PARA 5-11p. 598
PARA 5-12p. 600
PARA 5-13p. 602
PARA 5-14p. 604
PARA 5-15p. 606
PARA 5-16p. 608
PARA 5-17p. 611
PARA 5-18p. 612
PARA 5-19p. 614
PARA 5-20p. 615
PARA 5-21p. 616
PARA 5-23p. 618
PARA 5-24p. 620
PARA 5-25p. 622
PARA 5-26p. 627
+CHAPTER 6p. 630
PARA 6-2p. 631
PARA 6-3p. 635
PARA 6-4p. 637
PARA 6-5p. 639
PARA 6-6p. 641
PARA 6-7p. 643
PARA 6-9p. 646
PARA 6-10p. 655
PARA 6-11p. 657
PARA 6-12p. 663
PARA 6-13p. 665
PARA 6-14p. 669
PARA 6-15p. 671
PARA 6-16p. 672
PARA 6-17p. 673
PARA 6-18p. 675
PARA 6-19p. 679
PARA 6-20p. 682
PARA 6-21p. 683
PARA 6-23p. 686
PARA 6-24p. 687
PARA 6-25p. 688
PARA 6-26p. 689
PARA 6-27p. 691
PARA 6-28p. 693
PARA 6-29p. 695
PARA 6-30p. 697
PARA 6-31p. 699
+CHAPTER 7p. 704
PARA 7-2p. 705
PARA 7-3p. 707
PARA 7-4p. 713
PARA 7-5p. 715
PARA 7-6p. 717
PARA 7-7p. 719
PARA 7-8p. 720
PARA 7-8.1p. 723
PARA 7-10p. 727
PARA 7-11p. 732
PARA 7-12p. 734
PARA 7-13p. 736
PARA 7-14p. 738
PARA 7-15p. 740
PARA 7-16p. 752
PARA 7-17p. 754
PARA 7-18p. 756
PARA 7-19p. 758
PARA 7-21p. 760
PARA 7-22p. 766
PARA 7-23p. 770
PARA 7-24p. 772
PARA 7-25p. 776
PARA 7-26p. 778
+CHAPTER 8p. 780
PARA 8-2p. 781
PARA 8-3p. 785
PARA 8-4p. 787
PARA 8-4.1p. 795
PARA 8-5p. 805
PARA 8-5.1p. 815
PARA 8-6p. 824
PARA 8-7p. 825
PARA 8-8p. 826
PARA 8-9p. 829
PARA 8-10p. 831
PARA 8-11p. 837
PARA 8-13p. 843
PARA 8-14p. 845
PARA 8-15p. 847
PARA 8-16p. 849
PARA 8-17p. 851
PARA 8-18p. 853
PARA 8-19p. 857
PARA 8-20p. 861
PARA 8-21p. 863
PARA 8-22p. 867
PARA 8-23p. 869
PARA 8-24p. 871
PARA 8-24.1p. 875
PARA 8-24.2p. 877
PARA 8-25p. 881
PARA 8-26p. 883
PARA 8-27p. 887
PARA 8-28p. 889
PARA 8-29p. 891
PARA 8-30p. 893
+CHAPTER 9p. 894
PARA 9-2p. 895
PARA 9-3p. 896
PARA 9-4p. 897
PARA 9-5p. 899
PARA 9-6p. 901
PARA 9-7p. 902
PARA 9-8p. 903
PARA 9-9p. 904
PARA 9-10p. 905
PARA 9-11p. 907
PARA 9-11.1p. 908
PARA 9-12p. 909
PARA 9-13p. 914
PARA 9-14p. 915
PARA 9-15p. 916
PARA 9-16p. 918
+TABLES
TABLE 3-1p. 130
TABLE 3-2p. 166
TABLE 8-1p. 833
TABLE 8-2p. 839
INDEXp. 919
+PAGES
PAGE WARNING Cp. 4
PAGE Ap. 13
PAGE Dp. 16
PAGE Ip. 17
PAGE IIp. 18
PAGE 3-1p. 20
PAGE 3-2p. 21
PAGE 3-4p. 23
PAGE 3-5p. 24
PAGE 3-6p. 25
PAGE 3-8p. 27
PAGE 3-10p. 29
PAGE 3-12p. 31
PAGE 3-13p. 32
PAGE 3-14p. 33
PAGE 3-18p. 37
PAGE 3-19p. 38
PAGE 3-20p. 39
PAGE 3-22p. 41
PAGE 3-25p. 44
PAGE 3-26p. 45
PAGE 3-28p. 47
PAGE 3-29p. 48
PAGE 3-30p. 49
PAGE 3-31p. 50
PAGE 3-32p. 51
PAGE 3-33p. 52
PAGE 3-34p. 53
PAGE 3-35p. 54
PAGE 3-36p. 55
PAGE 3-38p. 57
PAGE 3-41p. 60
PAGE 3-46.1p. 66
PAGE 3-46.2p. 67
PAGE 3-48p. 69
PAGE 3-49p. 70
PAGE 3-50p. 71
PAGE 3-52p. 73
PAGE 3-53p. 74
PAGE 3-54p. 75
PAGE 3-56p. 77
PAGE 3-58p. 79
PAGE 3-59p. 80
PAGE 3-60p. 81
PAGE 3-61p. 82
PAGE 3-62p. 83
PAGE 3-64p. 85
PAGE 3-65p. 86
PAGE 3-66p. 87
PAGE 3-68p. 89
PAGE 3-69p. 90
PAGE 3-70p. 91
PAGE 3-71p. 92
PAGE 3-72p. 93
PAGE 3-73p. 94
PAGE 3-74p. 95
PAGE 3-75p. 96
PAGE 3-76p. 97
PAGE 3-77p. 98
PAGE 3-78p. 99
PAGE 3-82p. 103
PAGE 3-83p. 104
PAGE 3-84p. 105
PAGE 3-85p. 106
PAGE 3-86p. 107
PAGE 3-88p. 109
PAGE 3-90p. 111
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PAGE 3-94p. 115
PAGE 3-95p. 116
PAGE 3-96p. 117
PAGE 3-98p. 119
PAGE 3-100p. 121
PAGE 3-102p. 123
PAGE 3-104p. 125
PAGE 3-106p. 127
PAGE 3-107p. 128
PAGE 3-108p. 129
PAGE 3-109p. 130
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PAGE 3-116p. 137
PAGE 3-117p. 138
PAGE 3-118p. 139
PAGE 3-119p. 140
PAGE 3-120p. 141
PAGE 3-121p. 142
PAGE 3-122p. 143
PAGE 3-124p. 145
PAGE 3-125p. 146
PAGE 3-126p. 147
PAGE 3-127p. 148
PAGE 3-128p. 149
PAGE 3-129p. 150
PAGE 3-130p. 151
PAGE 3-130.1p. 152
PAGE 3-130.2p. 153
PAGE 3-132p. 157
PAGE 3-134p. 159
PAGE 3-136p. 161
PAGE 3-137p. 162
PAGE 3-138p. 163
PAGE 3-139p. 164
PAGE 3-140p. 165
PAGE 3-142p. 167
PAGE 3-143p. 170
PAGE 3-144p. 171
PAGE 3-145p. 172
PAGE 4-1p. 173
PAGE 4-2p. 174
PAGE 4-6.1p. 179
PAGE 4-6.2p. 180
PAGE 4-6.4p. 182
PAGE 4-7p. 193
PAGE 4-8p. 194
PAGE 4-10p. 196
PAGE 4-10.2p. 198
PAGE 4-12p. 200
PAGE 4-12.2p. 202
PAGE 4-12.5p. 204
PAGE 4-12.6p. 205
PAGE 4-12.9p. 208
PAGE 4-12.10p. 209
PAGE 4-12.12p. 211
PAGE 4-12.15p. 214
PAGE 4-12.16p. 215
PAGE 4-12.18p. 217
PAGE 4-12.21p. 220
PAGE 4-12.22p. 221
PAGE 4-12.24p. 223
PAGE 4-12.26p. 225
PAGE 4-12.28p. 227
PAGE 4-12.30p. 229
PAGE 4-12.37p. 236
PAGE 4-12.38p. 237
PAGE 4-13p. 238
PAGE 4-14p. 239
PAGE 4-16p. 241
PAGE 4-20p. 245
PAGE 4-23p. 247
PAGE 4-24p. 248
PAGE 4-26p. 250
PAGE 4-28p. 252
PAGE 4-28.1p. 253
PAGE 4-28.2p. 254
PAGE 4-28.4p. 256
PAGE 4-30p. 258
PAGE 4-31p. 259
PAGE 4-32p. 260
PAGE 4-32.2p. 262
PAGE 4-32.6p. 266
PAGE 4-34p. 268
PAGE 4-36p. 270
PAGE 4-36.2p. 272
PAGE 4-38p. 274
PAGE 4-39p. 275
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PAGE 4-41p. 277
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PAGE 4-52p. 288
PAGE 4-53p. 289
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PAGE 4-56p. 292
PAGE 4-57p. 293
PAGE 4-58p. 294
PAGE 4-59p. 295
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PAGE 4-62p. 298
PAGE 4-63p. 299
PAGE 4-64p. 300
PAGE 4-66p. 302
PAGE 4-66.1p. 303
PAGE 4-66.2p. 304
PAGE 4-68p. 306
PAGE 4-69p. 307
PAGE 4-70p. 308
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PAGE 4-94p. 331
PAGE 4-95p. 332
PAGE 4-96p. 333
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PAGE 4-99p. 336
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PAGE 4-102p. 339
PAGE 4-103p. 340
PAGE 4-104p. 341
PAGE 4-106p. 343
PAGE 4-107p. 344
PAGE 4-108p. 345
PAGE 4-109p. 346
PAGE 4-110p. 347
PAGE 4-112p. 349
PAGE 4-113p. 350
PAGE 4-114p. 351
PAGE 4-115p. 352
PAGE 4-116p. 353
PAGE 4-121p. 358
PAGE 4-122p. 359
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PAGE 4-127p. 364
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PAGE 4-194p. 431
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PAGE 4-222p. 459
PAGE 4-232p. 469
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PAGE 4-260.2p. 503
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PAGE 4-319p. 564
PAGE 4-320p. 565
PAGE 5-1p. 571
PAGE 5-2p. 572
PAGE 5-7p. 577
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PAGE 5-22p. 592
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PAGE 5-30p. 600
PAGE 5-32p. 602
PAGE 5-34p. 604
PAGE 5-36p. 606
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PAGE 5-46p. 616
PAGE 5-47p. 617
PAGE 5-48p. 618
PAGE 5-50p. 620
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PAGE 5-52.4p. 626
PAGE 5-53p. 627
PAGE 5-54p. 628
PAGE 6-1p. 630
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PAGE 7-1p. 704
PAGE 7-2p. 705
PAGE 7-4p. 707
PAGE 7-6p. 709
PAGE 7-9p. 712
PAGE 7-10p. 713
PAGE 7-12p. 715
PAGE 7-14p. 717
PAGE 7-16p. 719
PAGE 7-17p. 720
PAGE 7-18p. 721
PAGE 7-18.2p. 723
PAGE 7-18.5p. 726
PAGE 7-19p. 727
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PAGE 8-1p. 780
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PAGE 8-14.2p. 795
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PAGE 8-21p. 810
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PAGE 8-24.4p. 817
PAGE 8-24.7p. 820
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Chapters Covered in This Volume
- Chapter 3 – Engine Systems Maintenance: lubrication system (dipstick tube, filler tube, filter adapter, oil service, oil pan, cooler lines, oil cooler assembly, CDR valve and hoses), fuel system (air cleaner, filter element, air horn, air restriction gauge, fuel pump, fuel tank, supply/return lines, vent line and filter, filler cap and spout, fuel filter, glow plug, injection line brackets), accelerator system (linkage, pedal, idle speed, hand throttle cable), exhaust system (tailpipe, muffler, catalytic converter, crossover pipe, heat shields, exhaust manifolds), cooling system (servicing, radiator and fan shroud, surge tank, hoses, thermostat, water pump and adapter plate, water crossover, fan drive, drivebelts, tensioner)
- Chapter 4 – Electrical System Maintenance: generating and protective control box system (60/100/200 ampere alternators, regulators, cables, pulleys, mounting brackets, protective control box, distribution box, dual voltage alternator and regulator systems), starter and starting control system (rotary switch, starter, circuit breaker), instruments, sending units, switches and horn (instrument cluster and panel, gauges, tachometer, speedometer, warning lamps, switches, horn), transfer case and transmission electrical (indicator switches and lamps, transmission circuit breakers, relays, TCM, E-PROM, kick-down switch, TP sensor, speed sensors), lighting system (service headlight, blackout drive light, composite lights, side marker lights, directional signals, stoplight switches, backup lights), battery system (cables, terminal clamps, power feed through stud, buss bar, starter power cables, holddown, tray, slave receptacle, shunt, hood harness, connector repair), ambulance electrical system (ceiling lights, spotlights, control boxes, NBC control box and harness, interior lighting, antenna and intercom cables, 200 ampere alternator packages, heat/vent control panels)
- Chapter 5 – Transmission and Transfer Case Maintenance: transmission service (draining, filter, fluid), oil cooler lines, by-pass valve, dipstick tube, neutral start switch, shift controls housing assemblies, transmission shift rod, modulator assembly and link, vent line, converter housing covers, transmission mount, road test, transfer case shift rod, speedometer driven gear, vent line, oil seals
- Chapter 6 – Propeller Shafts, Axles, and Suspension Maintenance: front and rear propeller shafts, universal joint repair, halfshafts, geared hub side cover, geared hub replacement, geared hub input and spindle seals, spindle bearing adjustment, wheel studs, differential vent line, geared hub vent lines, steering stop, air lifting bracket, differential cover, stabilizer bar and link, radius rod, upper and lower ball joints, upper and lower control arms, coil springs, shock absorbers
- Chapter 7 – Brake System Maintenance: parking brake system (adjustment, caliper and rotor, lever, cable, rod, heat shields), service brake system (bleeding, pads, calipers, master cylinder, hydro-boost, lines, pedals, proportioning valve, rotor), rear dual service/parking brake system (pads, calipers, cables, rod, adjustment)
- Chapter 8 – Wheels and Steering Maintenance: wheel and runflat system (jacking, wheel replacement, tire/wheel/runflat maintenance for bias and radial tires, runflat compressor belts, inner rim studs, balancing, front toe-in and rear toe-out alignment), steering components (steering wheel, pitman arm, center link, tie rod and tie rod ends, idler arm, steering column, intermediate shaft, steering gear, U-joints, close-off, power steering pump, hydraulic hoses, control valve, cooler hoses, cooler, bleeding, relief valve)
- Chapter 9 – Frame Maintenance: front bumper and towing brackets, frame extension, tiedown ring, radiator front mount bracket, rear bumper brace, rear crossmember brace, rear bumper, inner mounting bracket, towing pintle, lifting shackle, receptacle mounting bracket, transmission mount crossmember, rear crossmember
This HMMWV M998 series unit maintenance manual volume gives the unit-level mechanic the full removal, disassembly, cleaning and inspection, assembly and installation procedures for every major system on the truck. The scope is broad: engine lubrication and fuel systems, the complete 24-volt electrical system including alternator and starting circuits, the transmission and transfer case, driveline and suspension, hydraulic and mechanical brake systems, wheels with runflat assemblies, steering, and the frame. Each task is structured with initial setup, tools and materials, equipment conditions, step-by-step procedures with torque values and clearances, and follow-on task references so the work can be scheduled in sequence without missing a step. Wiring diagrams, exploded views, sealant diagrams, and tightening sequences are placed with their procedures, which is what separates a usable unit maintenance manual from a general repair guide.
What This Volume Covers for the M998, M998A1, M1038, M1038A1, M1097, M1097A1, M1097A2 and M1123
Volume 2 is the middle volume of the three-part unit maintenance set. Volume 1 carries Chapters 1 and 2 (general information and troubleshooting), and Volume 3 carries Chapters 10 through 13 and the appendices. Having this volume means the engine and driveline work, the electrical diagnostics, the transmission and transfer case service, brake overhaul, and steering and frame repair are all covered in one document for the cargo/troop carrier, heavy variant, and up-armored HMMWV configurations. The towing carrier, armament carrier, S250 shelter carrier, and ambulance variants (M966, M996, M997, M1035, M1025, M1026, M1043, M1044, M1037, M1042, and their A1/A2 updates) are also addressed where their systems differ – particularly in the ambulance electrical section and the rear dual service/parking brake section for A2 vehicles.
Why This Manual Matters
Torque values on the HMMWV are not guesswork: the spindle retaining nut, halfshaft capscrews, ball joint locknuts, hub locknuts, brake caliper capscrews, and wheel locknuts all have published specifications that must be followed or the components will fail prematurely. This manual supplies those values, the tightening sequences for the wheel locknuts and the caliper halves, the sealant and adhesive application points, and the adjustment procedures for the parking brake, throttle position sensor, drivebelts, and toe-in and toe-out alignment. It also flags the safety warnings – drycleaning solvent use, compressed air limits, exhaust poisoning, wheel assembly inflation limits, and the danger of mixing radial and bias tires – that a mechanic needs to work on the truck without injury.
Instant PDF Delivery
The complete 1996 HMMWV M998 series unit maintenance manual Volume 2 (TM 9-2320-280-20-2) is delivered as an instant PDF download after checkout. No shipping, no waiting, no paper to lose. Read it on a laptop, tablet or phone in the bay, print only the pages you need for the job, and keep the full set on hand for every M998 series truck you service. Whether you are chasing an electrical fault, replacing a geared hub, adjusting the parking brake, or rebuilding a propeller shaft, this volume carries the procedures and specifications to do it correctly.
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