TM-9-2320-279-34-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS DIRECT SUPPORT AND GENERAL SUPPORT, VOLUME 1 OF 3
TM-9-2320-279-34-1 - Page 19 of 709
TM 9-2320-279-34-1
LIST OF TABLES (CONT)
Number
Title
Page
18-1
18-2
18-3
18-4
18-5
18-6
18-7
18-8
18-9
18-10
18-11
18-12
18-13
18-14
18-15
B-1
B-2
B-3
B-4
D-1
D-2
D-3
Extensions No. 3 and No. 4 Hoses and Tubes (Hose Reel Side) . . . . . . . . . . . . . . . . . . . . . . 18-79
Extensions No. 3 and No. 4 Hoses and Tubes (Hose Reel Side) . . . . . . . . . . . . . . . . . . . . . . 18-80
Extensions No. 1 and No. 2 Hoses and Tubes (Hose Reel Side) . . . . . . . . . . . . . . . . . . . . . . 18-81
Extensions No. 1 and No. 2 Hoses and Tubes (Hoist Cable Tiedown Block Side). . . . . . . . 18-82
Extensions No. 1 and No. 2 Hoses and Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-83
Hoist Hoses and Tubes (Hose Reel Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-84
Hoist Hoses and Tubes (Hose Reel Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-85
Hoist Hoses and Tubes (Hoist Cable Tiedown Block Side) . . . . . . . . . . . . . . . . . . . . . . . . . . 18-86
Inner Boom Hoses and Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-88
Unfolding Cylinders Hoses and Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-89
Main Hydraulic Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-90
Slewing System Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-92
Outrigger Control Tubes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-94
Outrigger Hoses and Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-95
Main Control Valve Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-96
Hoses and Hose Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-14
Locking Strips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-17
Locking Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-18
Harness Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-18
Torque Limits for Dry Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Torque Limits for Wet Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-3
Dry Torque Limits for M983 Crane (Metric) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-4
HOW TO USE THIS MANUAL
This manual is designed to help maintain the M977 series vehicles. In addition to this manual
TM 9-2320-354-24&P provides additional unique maintenance instructions for the M984 with HIAB 8109
crane and TM 9-2320-355-24&P provides additional unique maintenance instructions for the M985E1 with
HIAB 8108 crane. Listed below are some of the special features which have been put into help locate and
use needed information.
The front cover index provides a quick reference to chapters and sections that will be used often.
The appendixes are located at the end of the manual. They contain a reference guide to other
manuals, a manufactured items list, a list of expendable supplies and materials, and tables for torque
values.
Subject headings and certain other essential information are printed in bold type throughout the
manual to make them more visible.
The maintenance tasks describe what must be done to the vehicle before starting the task, and what
must be done to return the vehicle to operating condition after the task is finished.
The manual is divided into chapters containing direct support and general support maintenance
procedures. These procedures describe a number of things such as:
What will be needed to do the job.
If any assistance will be needed.
How long the job will take.
Important safety precautions.
In addition to the text, there will be an exploded-view illustration of most steps. This illustration is keyed
to the text and shows you how to take the part off and put it on. Cleaning and inspection procedures are
also included when required. The following problem will describe some of the features of this manual.
PROBLEM
The vehicle operator brings an M977 vehicle into the shop with a problem. Whenever the crane is
operated, the remote controller will not operate the crane. Organizational maintenance troubleshooting has
been completed and trouble has not been fixed.
vii
Change 1
Back to Top
