TM-9-2320-279-20-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3
TM-9-2320-279-20-1 - Page 569 of 985
TM 9-2320-279-20-1
Circuit Breaker Rack and Panel Removal/Installation. . .
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Instrument Panel Harness RemovaVInstallation. . .
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Brake ‘Treadle Valve Stoplight Switch Removal/Installation.
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Main Junction Box Assembly Removal/Installation (M978).
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Auxiliary Pump Junction Box Assembly Removal/Installation (M978).
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7-48
CHAPTER 7
ELECTRICAL SYSTEM MAINTENANCE
Contents
Para
General.
.................................................................
7-1
AlternatorTesting.
........................................................
7-2
Alternator and Pulley Removal/Installation.
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. . . .
. .
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7-3
Alternator Support and Adjusting Strap Removal/Installation .
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7-4
VoltageRegulatorRemoval/Installation.
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7-5
VoltageRegulatorAdjustment.
..............................................
7-6
Starter Motor Testing
.................................................................
7-7
Starter Motor Removal/Installation.
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7-8
Engine Speed Control Assembly Repair (M983).
.................
.................................
7-9
ENGINE HIGH IDLE Box Removal/Repair/Installation (M977, M985)
........................
7-10
ENGINE HIGH IDLE Box, Connector, Switches, and Bracket Removal/Installation
(Crane Mounted) (M984, M985E1).
..............................
...........................................
7-11
ENGINE HIGH IDLE Box, Connectors, and Switches Removal/Installation (Tire Davit
Mounted)(M984,M985E1).
......................................................................................
7-12
Oil Manifold Removal/Installation.
..........................
............................................
7-13
Engine Circuit Breaker Removal/Installation.
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...................................
7-14
Bus Bar Removal/Installation.
.............................
.................................................
7-15
Diode
Removal/Installation.
..................................
.................................................
7- 16
Sender Mounting Bracket Removal/installation .
................................
7-17
Utility Outlet Removal/Installation
.........................................................
7-18
Instrument Panel Removal/Installation.
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.......................................
7- 19
Oil Pressure Gage Removal/Installation.
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.......................................
7-20
7-21
Water Temperature Gage Removal/Installation.
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.................................
Transmission Oil Temperature Gage Removal/Installation. .
.......................
7-22
FuelGageRemoval/Installation.
........................................................
7-23
VoltmeterRemovaliInstaltation.
.......................................................
7-24
AmmeterRemoval/Installation.
...............................................................
7-25
Speedometer/OdometerRemoval/Installation.
...................................................................
7-26
Tachometer/HourmeterRemoval/Installation.
..........................................................
7-27
System Buzzer Removal/Installation
..........................................................
7-28
Junction Block Removal/Installation.
......................................................
7-29
Turn Indicator Light Assembly Removal/Installation.
.......................................
7-30
Warning Indicator Light Assembly Removal/Installation.
...................................
7-31
High Beam Indicator Light Assembly Removal/Installation.
...............................
7-32
Ignition Relay Removal/Installation.
.......................................................
7-33
Horn Relay Removal/Installation
............................................................
7-34
Magnetic Switch Removal/Installation
...................................................
7-35
Instrument Panel Receptacle Removal/Installation.
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..........................
7-36
ENGINE START Switch Removal/Installation.
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..............................
7-37
ENGINE STOP Switch Removal/Installation.
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.................................
7-38
Side Panel Switches Removal/Installation.
..........................
...............................
7-39
Engine Brake Indicator Light Removal/Installation.
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..............................
7-40
Main Light Switch Removal/Installation.
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.......................................
7-41
Heater Fan Switch Removal/Installation.
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7-42
Circuit Breaker (Center Console) Removal/Installation.
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...........................
7-43
7-44
7-45
7-46
7-47
Page.
7-3
7-3
7-5
7-7
7-9
7-10
7-11
7-13
7-15
7-25
7-32
7-51
7-60
7-63
7-68
7-73
7-74
7-76
7-79
7-81
7-82
7-84
7-86
7-88
7-90
7-92
7-93
7-94
7-95
7-96
7-98
7-100
7-101
7-103
7-105
7-109
7-111
7-113
7-114
7-116
7-117
7-118
7-119
7-122
7-125
7-139
7-142
7-150
7-1
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