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TM 5-3805-293-10
OPERATOR MAINTENANCE
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GENERAL INFORMATION
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SCOPE
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1. Type of Manual. This manual is for use in operating and performing operator troubleshooting and
maintenance on the 120M Motor Grader.
2. Model Numbers and Equipment Names. Grader, Road, Motorized, Diesel Engine Driven (DED), Heavy,
Commercial Construction Equipment (CCE) Model 120M.
3. Purpose of Equipment. The 120M Motor Grader is used for rough and finished grading, low and high bank
sloping, flat and V-ditching, scarifying bituminous road mixes, and snow removal. Mission support role includes
construction and maintenance of roads, airfields, hardstands, drainage, site preparation for pipeline, and river
crossing.
MAINTENANCE FORMS, RECORDS, AND REPORTS
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Department of the Army forms and procedures used for equipment maintenance will be those prescribed by (as
applicable) DA PAM 750-8, The Army Maintenance Management System (TAMMS) Users Manual or AR 700-138,
Army Logistics Readiness and Sustainability.
REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)
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If your 120M Motor Grader 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. (E-
Mail: TACOM-TECH-PUBS@conus.army.mil) We will send you a reply. The preferred method for submitting
Quality Deficiency Reports (QDRs) is through the Army Electronic Product Support (AEPS) website under the
Electronic Deficiency Reporting System (EDRS). The web address is: https://aeps.ria.army.mil. If the above
method is not available to you, put it on an SF 368 (Product Quality Deficiency Report), and mail it to us at:
Department of the Army, U.S. Army Tank-automotive and Armaments Command, AMSRD-TAR-E, PDQR MS 268,
6501 E. 11 Mile Road, Warren, MI 48397-5000.
CORROSION PREVENTION AND CONTROL (CPC)
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1. CPC of Army materiel is a continuing concern. It is important that any corrosion 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.
2. 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.
3. Plastics, composites, and rubbers can also degrade. Degradation is caused by thermal (heat), oxidation
(oxygen), solvation (solvents), or photolytic (light, typically UV) processes. The most common exposures are
excessive heat or light. Damage from these processes will appear as cracking, softening, swelling, and/or
breaking.
4. SF Form 368, Product Quality Deficiency Report should be submitted to the address specified in DA PAM
750-8, TAMMS Users Manual.
OZONE DEPLETING SUBSTANCES
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There are no ozone depleting substances contained on the machine or used during machine maintenance.
DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE
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For destruction of Army materiel to prevent enemy use, refer to TM 750-244-3.
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