TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 1117 of 1275
TM 9-2350-311-20-1 SECTION I. INTRODUCTION B-1 GENERAL This introduction (Section 1) provides a general explanation of all maintenance and repair functions authorized at various maintenance levels under the standard Army Maintenance System concept. The MAC in Section II designates overall authority and responsibility for the performance of maintenance functions on the identified end item or component. The application of the maintenance function to the end item or component will be consistent with the capacities and capabilities of the designated maintenance levels. Section Ill lists the Special Tools and Test Equipment (both special tools and common tool sets) required for each maintenance function as referenced from Section Il. B-2 MAINTENANCE FUNCTIONS Maintenance functions will be limited to and defined as follows (except for ammunition MAC): a. Inspect To determine the serviceability of an item by comparing its physical, mechanical and/or electrical characteristics with established standards through examination. b. Test To verify the serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of an item — and comparing those characteristics with prescribed standards. c. Service Operations required periodically to keep an item in proper operating condition, i.e., to clean (decontaminate), to preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids, or gasses. d. Adjust To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by setting the operating characteristics to specified parameters. e. Aline To adjust specified variable elements of an item to bring about optimum or desired performance. f. Calibrate To determine and cause corrections to be made or to be adjusted on instruments or test, measuring, and diagnostic equipment used in precision measurements. Consists of comparisons of two instruments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared. g. Remove/Install To remove and install the same item when required to perform service or other maintenance functions. Install may be B-2