TM-9-2320-279-10-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
OPERATOR’S MANUAL VOLUME 1 OF 2
DECEMBER 1998
CHANGE 5
TM-9-2320-279-10-1 - Page 19 of 773
TM 9-2320-279-10-1
CHAPTER 1
INTRODUCTION
Contents
Scope .
....................................................
Maintenance Forms and Records
............................
Equipment Improvement Report and Maintenance Digest
(EIR MD) and Equipment Improvement Report and
Maintenance Summary (EIR MS) .
..........................
Hand Receipt (HR) Manuals .
...............................
Submitting Quality Deficiency Reports (QDR) .
...............
Warranty Information
.....................................
Metric System.
. ...........................................
Reference Information .
....................................
Equipment Characteristics, Capabilities, and Features .
.......
Location and Description of Major Components .
.............
Differences Between Models .
...............................
Equipment Data .
..........................................
Systems Introduction .
.....................................
Electrical System .
.........................................
Air System .
...............................................
Main Hydraulic System (All models except M984E1) .
.........
Main Hydraulic System (M984E1) .
.........................
Power Steering Hydraulic System .
..........................
Section I. GENERAL INFORMATION
Vehicle Models
Para
1-1
1-2
Page
1-1
1-10
1-3
1-10
1-4
1-11
1-5
1-11
1-6
1-11
1-7
1-11
1-8
1-12
1-9
1-13
1-10
1-14
1-11
1-22
1-12
1-23
1-13
1-32
1-14
1-32
1-15
1-34
1-16
1-36
1-17
1-37
1-18
1-38
1-1. SCOPE
This manual is used for operation and operator-performed
maintenance of the 60,000-lb (27 240 kg) GVWR, 8x8, M977 series, Heavy
Expanded Mobility Tactical Truck (HEMTT). The M977 series vehicles consists of
a number of different models all built on similar chassis but specially equipped to
perform different missions. The models are as follows:
Model
Description
M977
Cargo vehicle with 62,000-lb (28 100 kg) GVWR and 100,000-lb
(45 400 kg) GCWR. Vehicle is equipped with material handling crane
with 2500-lb (1 135 kg) load capacity at 19 ft (5.8 m) boom radius and
has 18-foot cargo body (fig. l-l).
M978
Tanker vehicle with 2500-gal (9 463 L) tank and fuel resupply module
(fig. 1-2).
M983
Tractor vehicle with 100,000-lb (45 400 kg) GCWR. Vehicle is equipped
with fifth wheel, 2-inch or 3 1/2-inch kingpin.
Change 5
1-1
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