TM-9-2320-279-10-2
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
OPERATOR’S MANUAL VOLUME 2 OF 2
DECEMBER 1998
CHANGE 3
TM-9-2320-279-10-2 - Page 15 of 819
TM 9-2320-279-10- 2
CHAPTER 1
INTRODUCTION (CONT)
Content s
Para
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Maintenance Forms and Records. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Equipment Improvement Report and Maintenance Diges t
(EIR MD) and Equipment Improvement Report and
Maintenance Summary (EIR MS). . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Hand Receipt (HR) Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
Submitting Quality Deficiency Reports (QDR) . . . . . . . . . . . . . . . . 1-23
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Metric System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
Equipment Characteristics, Capabilities, and Features . . . . . . . . . 1-27
Location and Description of Major Components . . . . . . . . . . . . . . 1-28
Differences Between Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
Equipment Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30
Systems Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
Air System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
Main Hydraulic System (M984E1) . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
Power Steering Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
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1-6
1-9
1-9
1-15
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Section I. GENERAL INFORMATIO N
Vehicle Model
1-19. SCOPE. This volume is used for operation and operator-performe d
maintenance of the 95,000-lb (43 000 kg) GVWR, 8x8, M984E1 wrecker-recovery
vehicle. Refer to Volume 1 of this manual for description of all other models of
the M977 series vehicles.
Model
Description
M984E1 Wrecker vehicle with 95,000-lb (43 000 kg) GVWR and l14,000-lb
(51 700 kg) GCWR that can be increased to 155,000-lb (70 370 kg)
GCWR under certain conditions. Vehicle is equipped with material
handling crane with 6,000-lb (2 722 kg) load capacity at 18.2 ft (5.5 m)
boom radius 60,000-lb (27 240 kg) recovery winch, and equipment
body with 10 stowage compartments (fig. 1-21).
1-1
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