TM 10-3930-643-34 HYDRAULIC  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 12-19. Hydraulic Reservoir and Filter. (Sheet 4 of 11) REMOVAL  (cont) 10. Using a 9/16"   socket and socket wrench handle or 1/2" open end wrench, remove four bolts (21) and two flange halves (22) from right side of hydraulic reservoir (35) 11. Disconnect hose assembly (23) 12. Remove  and  discard  preformed  packing (24). 13. Using a 5/8"   socket  and  socket  wrench handle,   remove four bolts (25) and two flange halves (26). 14. Disconnect  hose  assembly  (27)  and remove  and  discard  preformed  packing (28). 15. Using a 5/8"   socket  and  socket  wrench handle,    remove  four  bolts  (29)  from hose assembly (30) on top of hydraulic pump. 16. Disconnect  hose  assembly  (30). 17. Disconnect  hose  assembly  from hydraulic  control  valve,  refer  to TM  20-3930-643-20. 18. Disconnect  hose  assembly  (30a)  from shut off valve on rear of engine. Go to sheet 5 12-173