TM 10-3930-664-24 2-120. ORBITAL STEERING VALVE REPLACEMENT This task covers: Removal, Cleaning, Inspection, and Installation INITIAL SETUP: Tools and Test Equipment: References: General Mechanics Tool Kit (1, App.   E) LO 10-3930-664-12 Drain Pan (10, App.   E) Vise (30, App.   E) Materials / Parts: O-Ring, Item 11 (4 ea.) O-Ring, Item 12 (1 ea.) A.    REMOVAL 1. Remove screws (1) to remove orbital steering valve (2) from steering column (3). NOTE Place            drain        pan        beneath        hoses        when disconnecting.   Drain hoses into pan. 2. Tag   and   disconnect   hose   assemblies   (4,   5,   6) from   fittings   (8).         Tag   and   disconnect   hose assemblies (7, 9) from elbow (10, 13). 3. Install  orbital  steering  valve  (2)  in  vise.  Remove fittings    (8)    and    elbows    (10,    13)    from    orbital steering  valve    (2).        Remove    and  discard  O- rings (11, 12). B.    CLEANING Clean    orbital    steering    valve    in    accordance    with paragraph 1-24. C.    INSPECTION Inspect   steering   valve   and   related   components   in accordance with paragraph 1-24. 2-326