TM 9-2350-287-10Table 2-1. Preventive Maintenance Checks and Services for Model M992A1LocationItemIntervalItem toCrewmemberNot Fully MissionNo.Check/ProcedureCapable If:Service38AfterSprocketsNOTE(continued)· Only two sprocket teeth havewear indicators.· Sprocket teeth wear faster on theinside. A tooth may be excessivelyworn, but still not show wear intowear mark.b. Check sprocket teeth for exces-b. One or moresive wear. Using a ruler, measuresprocket teeth wornfrom inside edge of tooth into wearinto edge of weararea. Then measure distance fromindicator; one oredge of tooth to wear indicator. Ifmore sprocket teeththe first measurement is equal to orshowing excessivegreater than the second, sprocketwear.wear is excessive. Notify Unitmaintenance.2-59
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