TM  10-3930-638-24&P 4-3.   FUEL   SYSTEM   MAINTENANCE   (cont) b. Fuel Injection Pump (cont). Use tool P/N 13336 STEP LOCATION ITEM ACTION REMARKS DISASSEMBLY  (cont) d. Install hydraulic head (81) in fixture on air inlet side of (cont) fixture e, Rotate rotor until cam rollers (118) are pushed to their extreme  outward  position  by  air  pressure f. Use a two inch micrometer and measure cam roller-to-cam roller dimension as shown g. Dimension shall be 1.965  * .0015 inch. Record the dimension obtained h. Remove hydraulic head from fixture and install in fixture P/N 19965 m.  Adjusting Remove screw  (120) n. Leaf spring (121) Remove NOTE Handle following parts (118, 119, 122, and 123) carefully; hands must be clean and wet with clean diesel fuel. o. Two cam Remove rollers (118) p. Two cam Remove roller shoes (119) q. Two pumping Remove Use extractor P/N 13301 as shown plungers  (122) 4-104