TM 9-2350-277-20-2PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDINGLUBRICATION INSTRUCTIONS — Continued0155 00ITEMNO.INTERVALMAN-HOURITEM TO BECHECKED ORSERVICEDCREWMEMBERPROCEDUREEQUIPMENTNOT READY/AVAILABLEIF:12Semi-AnnualSprocketMountingScrewsa. Check sprockets on both tracks for wearindicating that mounting screws have comeloose. Tighten loose screws to 110-115 lb-ft(149-156 N m) torque. Use torque wrench(WP 0926 00, Item 79).Any screwsare missing,loose, or worn.b. Check sprocket cushions for wear. Replacecushions if gouges, chips, or cuts causethumping (WP 0421 00).SPROCKETCUSHIONSSPROCKETSPROCKETHUBSCREWSMOUNTINGSCREWS0155 00-60
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