TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 86 of 828
TM 9–2350–311–20–2 2–25 Table 2-2. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF- PROPELLED HOWITZER – CONTINUED Location Item No. Not Fully Mission Capable if: Procedure Item to Check/Service Interval 5 Quarterly Elevation Mechanism a. Position vehicle on level ground. b. Release travel lock and stow. c. Elevate cannon through entire range of –53 to +1333 mils: Elevating fails af- ter attempting both methods. 1. Manual (a) From AG side of turret, manually elevate and depress howitzer. (b) Check for leaks in hydraulic lines, valves, and controls. Also for smoothness. Repair as necessary. 2. Power (a) Turn MASTER switch (1) and CAB POWER switch (2) to ON (light lit). (b) Turn ELEVATION CONTROL switch (3) to GUNNER posi- tion. (1) Elevate and depress can- non through entire range using gunner’s control handle (4). (2) Check for smoothness of operation through entire range. (3) Check for leaks in hy- draulic lines, valves, and controls. Repair as nec- essary. (c) Turn ELEVATION CONTROL switch (3) to NO. 1 position. Perform steps 2(a) through 2(c) again. 1 2 4 3