TM 10-3930-671-24 10.1. Hydraulic Sump - Fluid and Filter Change Hydraulic Sump and Filter Installation ................................................................................................ F-449 Hydraulic Sump Fluid Level Check..................................................................................................... F-450 Sump Tank Breather Maintenance..................................................................................................... F-450 Oil Filter Maintenance......................................................................................................................... F-450 Hydraulic System Fluid and Filter Change ......................................................................................... F-451 Check Operation of Hydraulic System  ............................................................................................... F-453 Hydraulic Oil Filter and Base Assembly Parts.................................................................................... F-454 Hydraulic Sump and Filter Installation F-449