TM  9-2330-238-14 Section  II.    MAINTENANCE   ALLOCATION  CHART  (Con't) (1) (2) (3) (4) Maintenance   Level (5) (6) Unit DS GS Depot Group Maintenance Tools  and Number Component/Assembly Function C O F H D Equipment Remarks 60 STEAM   BOILERS,   WA- TER  HEATERS,  HEAT- ING  UNITS,  BURNERS 6004 Fuel  System Fuel  Pumps Replace 0.5 1 Fuel Lines Replace 1.0 1 6007 Fuel  Tank Replace 2.0 1 6010 Exhaust   System Replace 2.0 1 6014 Unit  Heater Heaters Replace 1.0 1 Repair 2.0 B-8 Change  1