TM 10-3930-669-20 4-9.  FUEL FILTER HEAD REPLACEMENT (CONT ). b. Installation. (1) Install fuel filter head (3) on filter tray (10) with two screws (9), washers (8), and nuts (7). NOTE Install  fuel  hoses  as  tagged  during removal. (2) Install   two   fuel   hoses   (6)   on   fuel   filter head  (3)  with  four  washers  (5)  and  two screws (4). (3) Fill fuel filter (1) with fuel. (4) Coat   surface   of   preformed   packing   (2) with a light coat of clean fuel. (5) Install     fuel     filter     (1)     and     preformed packing (2) on fuel filter head (3).  Tighten fuel   filter   one-half   turn   after   preformed packing contacts fuel filter head. (6) Remove wiping rags from under fuel filter (1). (7) Start engine (TM 10-3930-669-10). NOTE Run engine for five minutes to allow air to escape from fuel system. (8) Shut off engine (TM 10-3930-669-10). NOTE Follow-on Maintenance: • Connect batteries (Para 7-48). • Close   right-hand   engine   access   cover   (TM   10- 3930-669-10). • Remove wheel chocks (TM 10-3930-669-10). END OF TASK 4-26