TM 10-3930-643-34 STEERING TROUBLESHOOTING AND  MAINTENANCE.  (cont) 9-6. Control Valve and Check Valve. (Sheet 14 of 15) INSTALLATION (cont) 95. 96. 97. NOTE The following is a difference between  M10A  Forklift  models. Install plate (5) and new preformed packing (4) on vehicles S/N 2001 and above. Position hose assembly (3) and two flange halves (2). Using a 9/16" socket and socket wrench  handle,  install four  bolts (l). ADJUSTMENT 98. 99. 100. 101. 102. Check  fluid  level  of  hydraulic  fluid reservoir, refer to LO  10-3930- 643-12. Fill to proper level. Check fluid filter, refer to TM 10- 3930-643-20.  Clean  or replace  as necessary. Using a 10" adjustable wrench, install relief valves, refer to TM 10-3930- 643-20. Using a 5/8"   socket  and  socket  wrench handle, remove one plug (48) and preformed  packing  (49). Discard preformed  packing  (49). Using a 10" adjustable wrench, install hydraulic pressure gage (0-3000 psi). Go to sheet 15 9-50