TM10-3930-660-34 16-4.  MAIN CONTROL VALVE ASSEMBLY - REPAIR (Cont’d) e.   Remove body (18) and O-ring (19). Discard O-ring (19). NOTE Do not remove relief valves unless they are being replaced. 2. REMOVE AND DISASSEMBLE TWO RELIEF VALVES (20) IF NECESSARY. a. Remove  nuts  (21  and  22).    Remove  and  discard  two seals (23) from nuts (21 and 22). b.   Remove adjusting screw (24), spring (25) and poppet (26). c. Remove  plug  (27),  O-ring  (28),  back-up  ring  (29)  and O-ring (30). Discard O-rings (28 and 30). d. Remove  spring  (31),  piston  (32),  O-ring  (33),  back-up ring  (34)  and  poppets  (35  and  36).    Discard  O-ring (33). e. Remove   body   (37)   and   O-ring   (38).   Discard   O-ring (38). 3.  DISASSEMBLE VALVE (39-68). a. Mark  housing  sections  of  valve.  These  marks  will  be used for assembly. b. Remove two nuts (39), one nut (40) and outlet section (41). NOTE Be careful not to loose springs (44) and poppets (45) when removing housing sections. c.    Remove housing sections (42 and 43). d.   Remove two springs (44) and two poppets (45). 16-20