TM  10-3930-643-34 ENGINE,  FUEL,  EXHAUST  AND  COOLING  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 4-14. Fuel Injection Pump, Cover Plate, Adapter and Drive Gears. (Sheet 4 of 9) DISASSEMBLY 15. Using an 11/16” open end wrench, remove adapters (40, 41 and 42) and elbows (43, 44 and 45) from fuel injection pump (36). 16. Using a 9/16”   socket and socket wrench handle,   remove two nuts (46), washers  (47)  and  adapter  (48). 17. Remove three bolts (49) and gear (50). 18. Using a 1/2”   socket,  socket wrench handle and a 1/2” open box wrench, remove two locknuts (51), washers (52), plate (53), two spacers (54), bolts  (55),  washers  (56),  gear (57) and pin (58) from adapter (48). 19. Using a 1/2” open end wrench and vise grip, remove two studs (59) and pins (60)0 20. Remove plug (61). NOTE The following are differences between M10A Forklift models. The disassembly/assembly  procedure  is identical. 210 Using 1–5/16”   and 1-1/4” open end wrenches,   remove  tachometer  drive (62) and locknut (62a) from cover (38), from vehicles S/N 2001 and above,   or remove plug (63) from cover (38),   from vehicles S/N 2000 and  below. 22. Using a 3/4” open end wrench, remove elbow (64) from cover (38). Go to sheet 5 4-96