TM 10-3930-643-34 STEERING  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 9-6. Control Valve and Check Valve. (Sheet REMOVAL 2 of 15) 1. 2. 3. 4. 5. 6. 7. NOTE Tag all hose and tube assemblies before disconnecting to aid in installation. Using a 9/16" socket and socket wrench handle, remove two bolts (1) and two flange halves (2) from under right side of cab. Disconnect hose assembly (3) from check valve (11). NOTE The following is a difference between  M10A  Forklift  models. Using a scribe, remove preformed packing (4) and plate (5) from vehicles S/N 2001 and above. Discard preformed packing (4). Remove  and  discard  preformed  packing (6). Using a 9/16” socket and socket wrench handle, remove four bolts (7) and two flange halves (8). Disconnect hose assembly (9). Remove preformed packing (10) and check valve (11). Discard  preformed packing (10). Go to sheet 3 9-38