TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 90 of 828
TM 9–2350–311–20–2 2–29 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 12 Annually or 1500 Rounds Torque Key NOTE • Do not mix grease. If changing between GMD and GAA wipe key and keyway. Clean before using new grease. • M185 cannon assembly has one torque key keyway. M284 cannon assembly has two keyways for redesigned torque key. Remove, measure, and lubricate torque key (located at top of cannon tube in front of exterior mount) (para 5–10). Measure torque key in at least three places. If mea- surement across torque key is less than 31/32 inch (24.6 mm) for M178 mount or 1–9/16 inches (3.97 cm) for M182 mount, replace torque key. Grease that part of torque key which fits in keyway with GMD or GAA and reinstall. M178 MOUNT CONFIGURATION M182 MOUNT CONFIGURATION