TM 5-4610-223-12 Section II.  MAINTENANCE ALLOCATION CHART - Continued (1) (2) (3) (4) (5) (6) *Maintenance Category Group Component/ Maintenance Tools and Number Assembly Function C O F H D Equipment Remarks Volute housing' Housing: Replace 1.8 Seal assembly: Replace 1.5 Impeller; Rotor, Diaphragm Replace 1.5 Suction valve Suction Heads: Replace 1 5 Gasket Replace 1 5 Hose Fittings Inspect 0 2 Replace 0 5 12 PRECISION AND TOPOGRAPHICAL INSTRUMENTS Levels: Inspect Replace 0.5 13 FIRE FIGHTING EQUIPMENT: Fire Extinguishers: Service 0 5 Replace 0.2 *Subcolumns are as follows: C - Operator/Crew O - Organizational F - Direct Support H - General Support D - Depot D-17