TM-5-2350-378-24-P
HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
TM-5-2350-378-24-P - Page 16 of 790
TM 5--2350--378--24&P
0001 00--1
GENERAL INFORMATION
0001 00
SCOPE
Type of Manual:
Direct Support and General Support
Model Number and Equipment Name:
M9 ACE HDC -- Armored Combat Earthmover, Hydraulic Diagnostic Center.
Purpose of Equipment:
Reduce maintenance time when vehicle’s hydraulic system fails.
MAINTENANCE FORMS, RECORDS, AND REPORTS
Department of the Army forms and procedures used for equipment maintenance will be those prescribed by DA
PAM 738--750, The Army Maintenance Management System (TAMMS).
REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)
If your Hydraulic Diagnostic Center (HDC) needs improvement, let us know. Send us an EIR. You, the user, are
the only one who can tell us what you don’t like about your equipment. Let us know why you don’t like the design
or performance. Put it on an SF 368 (Quality Deficiency Report). Mail it to us: Commander, U.S. Army Tank--au-
tomotive and Armaments Command, ATTN: AMSTA--TR--E/MPA/267, Warren, MI 48397--5000. We’ll send you a
reply.
CORROSION PREVENTION AND CONTROL (CPC)
Corrosion Prevention and Control (CPC) of Army materiel is a continuing concern. It is important that any corro-
sion problems with this item be reported so that the problem can be corrected and improvements can be made to
prevent the problem in future items. Corrosion specifically occurs with metals. It is an electrochemical process
that causes the degradation of metals. It is commonly caused by exposure to moisture, acids, bases, or salts. An
example is the rusting of iron. Corrosion damage in metals can be seen, depending on the metal, as tarnishing,
pitting, fogging, surface residue, and/or cracking. Plastics, composites, and rubbers can also degrade. Degrada-
tion is caused by thermal (heat), oxidation (oxygen), solvation (solvents), or photolytic (light, typically UV) proces-
ses. The most common exposures are excessive heat or light. Damage from these processes will appear as
cracking, softening, swelling, and/or breaking. SF Form 368, Product Quality Deficiency Report should be sub-
mitted to the address specified in DA PAM 738--750, Functional Users Manual for the Army Maintenance Manage-
ment System (TAMMS).
DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE
When the tactical situation requires that Army materiel be abandoned, refer to TM 750--244--6, Procedures for De-
struction of Tank--Automotive Equipment to Prevent Enemy Use.
PREPARATION FOR STORAGE OR SHIPMENT
When not in use, stow HDC control box in stowage fixture with front of control box facing towards the rear wall
and electrical connectors at top. To secure HDC control box in stowed position, hand--tightened wing nuts against
retainer bar on threaded rods.
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