ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 CAUTION Do  not  allow  camshaft  lobes  to  drag  on  engine  block  honed  bore  surfaces  while  Installing camshaft.      Machine   surfaces   may   become   scratched   or   scored.      Revolve   camshaft   during installation to avoid obstruction in any bore. d. Put clean engine lubricating oil (MIL-L-2104) on camshaft bearing journals. e. Install camshaft (3) and thrust plate (4) in engine block. f. Install two capscrews (1) and tighten to 35 ft-lbs (47 Nm). g. Time camshaft as follows: NOTE If not removed, remove upper idler gear, refer to paragraph 3-42.1. (1) With  timing  tool  (JD-254)  resting  on  nose  of  crankshaft,  turn  camshaft  (3)  until  timing  mark  aligns  with center of camshaft gear (5), refer to FIGURE 3-113. (2) Check injection pump gear timing with timing tool (JD-254).  Timing mark with 4" beside it, must align with center of injection pump gear. NOTE Use the timing mark corresponding to the number of cylinders. (3) Install upper idler gear (3, FIGURE 3-115) on is shaft without turning camshaft gear (5) or injection pump gear. (4) Install washer (2) so hole and spring pin align.  Install capscrew (1).  Tighten capscrew (1) to 65 ft-lbs (90 Nm). FIGURE 3-113.  Aligning Timing Mark and Camshaft Gear (5) Recheck gear timing to make sure it is still correct. h. Install timing gear cover, refer to paragraph 3-39.3. i. Install rocker arm assembly and pushrods, refer to paragraph 3-33.5. j. Install fuel supply pump, paragraph 3-25.3. 3-163