Section I. GENERAL
a. These instructions are published for the use of the personnel to whom the mixer is issued. They provide
information on the operation and organizational maintenance of the equipment.
of publications applicable
to this manual. Appendix B contains the maintenance
allocation chart. Appendix C contains the list of basic issue items list, items-troop installed or authorized.
1-2. Maintenance Forms and Records
a. DA forms and procedures used for equipment maintenance will be only those prescribed by TM 38-750, The
Army Maintenance Management System (TAMMS).
b. Reporting Errors and Recommending Improvements. You can help improve this manual. If you find any
mistakes or if you know of a way to improve the procedures, please let us know. Mail your letter or DA 2028
(Recommended Changes to Publications and Blank Forms) direct to: Commander, US Army Tank-Automotive
Materiel Readiness Command, ATTN: DRSTA-MBP, Warren, MI 48090. A reply will be furnished to you.
Section II. DESCRIPTION AND DATA
The concrete mixer, Model 499A (fig. 1-1 and 1-2) is a four wheel, portable mixer equipped with a four
cylinder, air-cooled gasoline engine. The skip has a closed end with an arched cover plate for fast charging.
The water tank is an automatic vertical siphon type with a gauge graduated in pounds and gallons. The skip
clutch, skip brake, water controls, and discharge wheel are within arm's length of operator.