TM  5-3895-376-14&P 5-5.  FUEL  PUMP  MAINTENANCE  INSTRUCTIONS  -  Continued 2. Remove two hex nuts (1), lockwashers (2) and fuel  pump  (3)  from  gear  cover. 3. Remove shims (4) and gaskets (5), and set aside   for   reference/reinstallation. 4. Remove  setscrew  (6)  and  lockwasher  (7)  from inside the oil filler opening. 5. Remove  the  roller  tappet  (8). 6. Remove  studs  (9)  only  if  replacement  is  re- quired. CLEANING W A R N I N G P-D-680,Type  III,  is  moderaetly  toxic  to the  skin,  eyes  and  respiratory  tract; avoid prolonged exposure.  Skin and eye  protection  is  required.    Good  ventila- tion  is  required.    Do  not  use  near  open flame or excessive heat.  Flash point is 200°  F  (93.3°  C) 1. Clean  exterior  of  fuel  pump  with  rag  dampened  in dry  cleaning  solvent  and  dry  thoroughly. 2. Clean all other parts in dry cleaning solvent and dry  thoroughly. 3. Ensure  that  all  gasket  material  removed  from mating  surfaces. INSPECTION 1. Inspect roller tappet for signs of excessive wear, or  scoring  along  outside  diameter.    Replace  roller tappet that is damaged in any way. 2. Inspection  of  fuel  pump  consists  of  examining  the pump for signs of wear, and other signs of exter- nal damage.  Replace a worn of otherwise exter- nally  damaged  fuel  pump. 3 . Inspect  threaded  fasteners  for  stripped  threads  or other  damage.    Replace  damaged  fasteners. INSTALLATION 1 Install studs (9). if they were removed 2 If  reinstalling  the  pump  assembly  (3)  and  roller tappet that was removed from the engine. pro- ceed  as  follows: a Install  roller  tappet  in  bore  of  gear  cover, aligning the slot in side of tappet with hole for setscrew  (6)  in  the  oil  filler  passage. b. Install  setscrew  (6)  and  lockwasher  (7),  ensur- ing that pilot on end of setscrew (6) seats into groove  of  roller  tappet  (8)  and  that  tappet moves  freely  on  It’s  axis  for  length  of  slot. c. Install new gasket (5), with shims (4) that were  removed  onto  the  studs  (9). NOTE If  a  combination  of  steel  and  plastic shims  (4)  are  used,  always  place  the  steel shim between the plastic shim(s) and the gasket  (5) 5-10