TM  10-3930-638-24&P 4-3.   FUEL   SYSTEM   MAINTENANCE   (cont) b. Fuel Injection Pump (cont). STEP LOCATION ITEM ACTION REMARKS DISASSEMBLY   (cont) 12 CAUTION cont) Rotor is no longer retained in hydraulic head. Don’t let them slip apart  when  performing  the  following  step. f. Hydraulic Place in head (81) holding fixture P/N 19965 g. Four fuel Remove line  connector screws  (112) and eight washers  (113) h. Retaining ring Remove Use snap ring pliers tool P/N 13337 (114) i.  Governor Lift  off weight and  remove retainer  (115) j. Cam ring (116) Lift  off and  remove k. Seal (117) Remove and discard l.  Cam  rollers Check  and  record (118) roller-to-roller dimension: a. Install fixture P/N 19969 in vise b. Assemble 1/4-18 NPT fitting to fixture air inlet c. Adapt fitting to a 30– 100 PSI source of clean, dry air CAUTION Handle hydraulic head carefully in following step and hold cam rollers (118) and shoes (119) in their slots to prevent rotor, cam rollers, and shoes from falling. 4-103